988K

Overview

Cat® Large Wheel Loaders are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Introduced in 1963, the 988 has been the industry leader for 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.
Net Power403 kW541 HP
Engine ModelCat® C18 ACERT™
Bore145 mm5.7 in
Stroke183 mm7.2 in
Displacement18.1 l1105 in³
Torque Rise58 %58 %
Rated Speed1,700 rpm
EmissionsU.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross - ISO 14396432 kW580 HP
Net Power - SAE J1349403 kW541 HP
Peak Power Speed1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396432 kW580 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995439 kW588 HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349403 kW541 HP
Peak Torque - 1,200 rpm2852 N·m2104 lb/ft
Operating Weight51062 kg112574 lb
Bucket Capacity Range4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - High Lift773-775
Cat Truck Match - Standard770-772
Rated Payload - Loose Material14.5 t16 t
Rated Payload - Quarry Face11.3 t12.5 t
Transmission TypeCat planetary power shift
Forward - 16.5 km/h4 mile/h
Forward - 211.6 km/h7.2 mile/h
Forward - 320.4 km/h12.7 mile/h
Forward - 434.7 km/h21.6 mile/h
Reverse - 17.5 km/h4.7 mile/h
Reverse - 213.3 km/h8.3 mile/h
Reverse - 323.2 km/h14.4 mile/h
Direct Drive - Forward 1Lock-up disabled
Direct Drive - Forward 212.5 km/h7.8 mile/h
Direct Drive - Forward 322.3 km/h13.9 mile/h
Direct Drive - Forward 439.3 km/h24.4 mile/h
Direct Drive - Reverse 18 km/h5 mile/h
Direct Drive - Reverse 214.3 km/h8.9 mile/h
Direct Drive - Reverse 325.5 km/h15.8 mile/h
Cylinders, Double Acting - Lift, Bore and Stroke210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke269 mm × 685 mm (8.7 in × 27 in)
Lift/Tilt SystemVariable displacement piston
Lift/Tilt System - CircuitEH- Positive Flow Control, Flow Sharing
Maximum Flow52 l/min13.7 gal/min
Maximum Flow at 1,400-1,860 rpm580 l/min153 gal/min
Pilot SystemVariable displacement piston
Relief Valve Setting3800 kPa551 psi
Relief Valve Setting - Lift/Tilt32800 kPa4757 psi
Fuel Tank712 l188 gal (US)
Cooling System120 l31.7 gal (US)
Crankcase60 l15.9 gal (US)
Transmission120 l31.7 gal (US)
Hydraulic System - Tank Only240 l63.4 gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)33 l8.7 gal (US)
Differential - Final Drives - Front186 l49.1 gal (US)
Differential - Final Drives - Rear186 l49.1 gal (US)
Hydraulic System Factory Fill475 l125.5 gal (US)
Bucket Capacities4.7-13 m3 (6.2-17 yd3)
FrontFixed
RearTrunnion
Oscillation Angle13°
BrakesSAE J1473 OCT90, ISO 3450:1992
Maximum Flow270 l/min71.3 gal/min
Relief Valve Setting - Steering30000 kPa4351 psi
Steering Cycle Times - High Idle3.4 s3.4 s
Steering Cycle Times - Low Idle5.6 s5.6 s
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Total Steering Angle86°
Dump2.2 s2.2 s
Lower Float Down3.5 s3.5 s
Rack Back4.5 s4.5 s
Raise8 s8 s
Total Hydraulic Cycle Time - Empty Bucket18.2 s18.2 s
Machine Sound Level (ISO 6395)111 dB(A)111 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)
Machine Sound Level (ISO 6395)109 dB(A)109 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)
Coolant (Validated by Test Cell Fill Quantities)125 l33 gal (US)
Transmission - Validated by Test Cell Fill Quantities110 l29 gal (US)
Machine Sound Level (ISO 6395)112 dB(A)112 dB(A)
Operator Sound Level ( ISO 6396)73 dB(A)73 dB(A)
Machine Sound Level (ISO 6395)110 dB(A)110 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)

988K Standard Equipment

  • ELECTRICAL
    • Alarm, back-up
    • Alternator, single 150 amp
    • Batteries, dry
    • Converter, 10/15 amp, 24V to 12V
    • Lighting system (halogen, work lights, access and service platform lighting)
    • Starting and charging system, 24V
    • Starter emergency start receptacle
    • Starter lockout in bumper
    • Transmission lockout in bumper
  • OPERATOR ENVIRONMENT
    • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
    • Air conditioner
    • Cat Detect Vision, rear vision camera system
    • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
    • Controls, lift and tilt function
    • Heater, defroster
    • Horn, electric
    • Instrumentation, gauges: – Coolant temperature – Engine hour meter – Hydraulic oil temperature – Power train oil temperature
    • Light, cab, dome
    • Lunchbox, beverage holders
    • Mirrors, rearview (externally mounted)
    • Rimpull Control System
    • Seat, Cat Comfort (cloth), air suspension, six-way adjustable
    • Seat belt minder
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC Control System
    • UV glass
    • Transmission gear indicator
    • Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
    • Wet-Arm wipers/washers (front and rear): – Intermittent front and rear wipers
    • Lights, directional
  • POWER TRAIN
    • Brakes, oil-cooled, multi-disc, service/secondary
    • Case drain screens
    • Crankcase guard
    • Electro hydraulic parking brake
    • Engine, C18 ACERT MEUI diesel, turbocharged/aftercooled
    • Ground level engine shutoff
    • Turbine precleaner, engine air intake
    • Radiator, Aluminum Modular Radiator (AMR)
    • Starting aid, ether, automatic
    • Throttle lock, electronic
    • Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
    • Transmission, planetary powershift, 4F/3R electronic control
    • Manual switch and automatic fuel priming
    • Cat Production Measurement ready
  • OTHER
    • Automatic bucket lift kickout/positioner
    • Base machine price includes a rim allowance
    • Hydraulically driven demand fan
    • Couplings, Cat O-ring face seals
    • Doors, service access (locking)
    • Ecology drains for engine, radiator, hydraulic tank
    • Fuel tank, 731 L (188 gal)
    • Hitch, drawbar with pin
    • Hoses, Cat XT™
    • Hydraulic, steering and brake filtration/screening system
    • Cat Clean Emission Module
    • Oil sampling valves
    • Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
    • Rear access to cab and service platform
    • Steering, load sensing
    • Toe kicks
    • Vandalism protection caplocks

988K Optional Equipment

  • POWER TRAIN
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling – software
    • Cat Production Measurement
  • OPERATOR ENVIRONMENT
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
    • Handrail mounted mirrors
  • MISCELLANEOUS ATTACHMENTS
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler

Exterior

Interior

Efficiency

Efficiency

Cat C18 ACERT™ Engine
Cat C18 ACERT™ Engine - The Cat C18 ACERT engine is built and tested to meet your most demanding applications while meeting Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent emission standards.
  • Fully integrated electronic engine controls works in concert with the entire machine to make your fuel go farther.
  • Use less fuel idling with Engine Idle Shutdown.
  • Maximized durability with Delayed Engine Shutdown.
Cat Planetary Powershift Transmission
Cat Planetary Powershift Transmission - Featuring all new Advanced Productivity Electronic Control Shifting (APECS) transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points.
Impeller Clutch Torque Converter (ICTC)
Impeller Clutch Torque Converter (ICTC) - Enable your operators to maximize efficiency by varying machine rimpull while putting more horsepower to hydraulics.
  • Reduced tire wear
  • Enables full throttle shifts for faster cycle times
  • Provides smooth approach to the dump target for less spillage and faster cycle times.
Cat Torque Converter with Lock-up Clutch
Cat Torque Converter with Lock-up Clutch -
  • Eliminates TC losses while lowering system heat
  • Improves travel speeds
  • Reduces cycle times in load and carry operations
Economy Mode
Economy Mode - Enabling maximum productivity and efficiency, all day every day. The 988K systems work hard to save you fuel through advanced technologies. Utilizing On Demand Throttle, operators maintain normal operation with the left pedal and implements while the 988K manages the engine speed.
  • Provides similar control and feel to our traditional throttle lock feature.
  • Efficiency of manual throttle and the ergonomics of throttle lock operation.
  • Reduced fuel consumption by up to 20% compared to the 988H.

Structures

Structures

Robust Structures - Your bottom line is improved by highly durable structures that achieve multiple life cycles and withstand the toughest loading conditions.
  • Full box-section rear frame resists torsional shock and twisting forces.
  • Heavy-duty steering cylinder mounts efficiently transmit steering loads into the frame.
  • Axle mounting has been optimized for increased structural integrity.
  • Lower hitch pin, frame plate, and bearing size have been increased for longer life.
Lift Arms
Lift Arms -
  • Excellent visibility to the bucket edges and work area through a Z-bar design.
  • High load stresses are absorbed by the solid steel lift arms.
  • Enhance strength in key pin areas through the use of one piece castings.
  • Stress relieved lift arms increase durability and lengthen time to repair.
Front Linkage
Front Linkage - To ensure long life and reliability, the linkage pin joints feature a greased pin design with an auto lube system attachment available from the factory.

Power Train

Power Train

Steering and Transmission Integrated Control System (STIC™)
Steering and Transmission Integrated Control System (STIC™) - Experience maximum responsiveness and control with STIC that combines directional selection, gear selection and steering into a single lever.
  • Simple side-to-side motion turns machine right or left, minimizing operator movements.
  • Easy to operate finger controlled gear selection.
  • Smoother, faster cycles and less operator fatigue through the use of low effort integrated controls.
Cat Planetary Powershift Transmission
Cat Planetary Powershift Transmission - Building your success begins with a best-in-class transmission designed specifically for mining applications.
  • Consistent, smooth shifting and efficiency through integrated electronic controls that utilize Advanced Productivity Electronic Control Strategy (APECS).
  • Long life and reliability through heat treat gear and metallurgy.
  • Four forward and three reverse speeds to match your application.
Cat C18 ACERT Engine
Cat C18 ACERT Engine - Durability and efficiency at the heart of your 988K comes from the Cat C18 ACERT Engine. Optimum performance is built in through the use of a 6 cylinder, four-stroke design.
  • Optimized performance and quick engine response with an electronic control module.
  • Reliable efficiency with complete control over injection timing, duration and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
  • Extended engine life and improved fuel efficiency with reduced rated speed.
  • Designed to meet Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent emission standards.
Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) - Lower your cost per ton utilizing advanced ICTC and RCS for modulated rimpull.
  • Reduce tire slippage and wear by modulating rimpull from 100 to 25 percent while depressing left pedal. After 25 percent rimpull is achieved the left pedal applies the brake.
  • Reduce the potential for wheel slippage without reducing hydraulic efficiency with RCS.
  • Improve fuel efficiency in certain applications with our lock-up clutch torque converter providing direct drive.

Hydraulics

Hydraulics

Positive Flow Control Hydraulics
Positive Flow Control Hydraulics - Increase efficiency through our Positive Flow Control (PFC) Hydraulic System. PFC has concurrent pump and valve control. By optimizing pump control, hydraulic oil flow is proportionate to implement lever movement.
  • Fast, productive cycles are enabled by the fully variable implement pump.
  • Increase bucket feel and control through increased hydraulic response.
  • Consistent performance and efficiency with lower system heat.
  • Full hydraulic flow down to 1,400 engine rpm enabled by flow sharing technology.
Electro Hydraulic Controls
Electro Hydraulic Controls - Operators increase productivity with our responsive implements feature.
  • Operate comfortably through electronically controlled hydraulic cylinder stops.
  • Handle easy-to-use soft detent controls.
  • Conveniently set automatic implement kickouts from inside the cab.
Steering System
Steering System - Confident loader operation starts with precise machine control enabled by the 988K's load sensing hydraulic steering system.
  • Increase efficiency with our variable displacement piston pumps.
  • Achieve precise positioning for easy loading in tight areas with 43 degrees of steering articulation.
  • Enhance operator comfort with integrated steering and transmission control functions.
Filtration System
Filtration System - Benefit from extended performance and reliability of your hydraulic system with our advanced filtration system.
  • Case drain screens.
  • Hydraulic oil cooler return filter.
  • Pilot filter.
  • Return screens inside hydraulic tank.
  • Axle oil cooler screens if equipped.

Operator Station

Operator Station

Your operators can work more efficiently and stay comfortable with our customer-inspired cab features.
Entry and Exit - Enter and exit the cab easily and safely with these newly designed, ergonomic features.
  • Fold up STIC steer/armrest.
  • Reduced access stairway angles.
  • Standard stairway lighting.
Cat Comfort Series III Seat
Cat Comfort Series III Seat - Enhance comfort and helps reduce operator fatigue with Cat Comfort Series III seat.
  • Mid back design and extra thick, contoured cushions.
  • Air suspension system.
  • Easy-to-reach seat levers and controls for six way adjustments.
  • Seat-mounted implement pod and STIC steer that moves with the seat.
  • 76 mm (3 in) wide retractable seat belt.
Control Panel
Control Panel - Ergonomic placement of switches and information display keep your operators comfortable all day every day.
  • Large backlit membrane switches feature LED activation indicators.
  • Switches feature ISO symbols for quick function identification.
  • Two position rocker switch activates the electro hydraulic park brake.
Environment
Environment - Your operator's productivity is enhanced with our clean, comfortable cab environment.
  • Experience reduced vibrations from isolated cab mounts and seat air suspension.
  • Maintain desired cab temperature with automatic temperature controls.
  • Pressurized cab with filtered air.
  • Reduced operator sound levels.
  • Convenient floor storage tray/lunch box.

Technology Solutions

Technology Solutions

Integrated electronics provide flexible levels of information to both the site and the operator. This integration creates a smart machine and more informed operator, maximizing the productivity of both.
Information Display
Information Display - We have worked hard to help our customers and operators perform at their best through our newly upgraded touch screen information display.
  • Intuitive operation and easy navigation with our enhanced user interface.
  • Decrease service time by keeping operators informed about machine systems.
  • Quick on-the-go weighing with the Cat Production Measurement.
Cat Product Link™
Cat Product Link™ - Take the guesswork out of asset management with Product Link remote monitoring.
  • Remote access to information through the easy-to-use VisionLink® interface.
  • Maximize uptime by staying informed on machine systems and diagnostic codes.
  • Track machine with utilization, fuel usage, and payload summaries.
  • Stay up to date on machine location, service meter hours, and reporting status.
Vital Information Management System (VIMS™) - Connect directly to the machine for access to a wide range of sensor information and enhanced machine data.
  • Create productivity reports with payload and work cycle segmentation.
  • Identify operator training needs through productivity data.
  • Detailed data logging of machine parameters and diagnostic codes.
  • Track machine sensor information with trend analysis and histograms to monitor machine health.

Serviceability

Serviceability

  • Safe and convenient service with ground level or platform access and grouped service points.
  • Swing-out doors on both sides of the engine compartment provide easy access to important daily service checks.
  • Ecology drains for ease of service and prevention of spilling potential environmental contaminants.
  • Reduce downtime with VIMS system notifications so your operators and technicians can resolve any problems before failure.
  • Ground level access to transmission control valves.

Customer Support

Customer Support

Legendary Cat Dealer Support - A valued partner, your Cat dealer is available whenever you need them.
  • Preventive maintenance programs and guaranteed maintenance contracts.
  • Best-in-class parts availability.
  • Improve your efficiency with operator training.
  • Genuine Cat Remanufactured parts.

Safety

Safety

We are constantly improving our products in an effort to provide a safe work environment for the operator and those who work on your job site.
Machine Access
Machine Access -
  • Left and right hand stairs with 45 degree angle enhance safety for operators getting on and off the 988K.
  • Continuous walkway with non-skid surfaces are designed into the service areas.
  • Maintain three points of contact at all times through ground level or platform accessible service areas.
Visibility -
  • Optional heated mirrors ensure enhanced visibility for safe operation.
  • Standard Cat Vision or optional Cat Detect with radar increase operator awareness around the machine.
  • Optional HID or LED lights provide excellent workspace visibility.
  • Optional cab mounted LED warning beacons.
Operator Environment
Operator Environment -
  • Reduced vibrations to the operator with isolated cab mounts and seat mounted implement and steering controls.
  • Low interior sound levels.
  • Pressurized cab with filtered air.
  • Standard 76 mm (3 in) seat belts on the operator seat.

Sustainability

Sustainability

Reducing the Impact to the Environment - Sustainability is designed and built into our 988K's features.
  • Burns up to 20% less fuel than the previous model to minimize your carbon footprint.
  • Engine Idle Shutdown can help you save fuel by avoiding unnecessary idling.
  • Reduce waste with our maintenance free batteries.
  • Built for multiple lives, the Cat 988 is one of the most rebuilt products. To assist with maximizing machine life, Caterpillar provides a number of sustainable options such as our Reman and Certified Rebuild programs. In these programs, reused or remanufactured components can deliver cost savings of 40 to 70 percent, which lowers operating cost while benefiting the environment.
  • Caterpillar offers retrofit packages to bring new features to older machines, maximizing your resource. And, when you go through the Cat Certified Rebuild program, these retrofit kits are part of the rebuild process.

System Match Efficiency

System Match Efficiency

Efficient Combination - For full truck payloads with minimum loading time, an efficient loading/hauling system starts with a perfect match. Cat wheel loaders are matched with Cat off-highway trucks to maximize volume of material moved at the lowest operating cost per ton. The 988K equipped with the standard linkage will pass match the 770 (36 tonnes/40 tons) in 3 passes and the 772 (45 tonnes/50 tons) in 4 passes. Equipped with a high lift linkage the 988K is capable of loading a 773 (56 tonnes/61.7 tons) in 5 passes and the 775 (64 tonnes/70 tons) in 6 passes.

Bucket Ground Engaging Tools

Bucket Ground Engaging Tools

Enhance the productivity of your loader and protect your investment in buckets with our Ground Engaging Tools (GET). Your knowledgeable Cat dealer will work with you to understand your application and needs for the GET that is best for you.
Performance Series Buckets - Performance Series Buckets feature an optimized profile maximizing material retention and minimizing dig time, translating into significant productivity and fuel efficiency improvements. All 988K buckets are manufactured with the Performance Series design.
Rock Bucket
Rock Bucket - Applications: Face loading tightly compacted pit materials.
General Purpose Bucket - Applications: Loading loose, stockpiled material.
GET Options - Multiple GET options are available to customize your 988K to your application, such as:
  • Sidebar protectors.
  • General duty and penetration tips.
  • Standard and half arrow segments.

Operating Costs

Operating Costs

Data from customer machines show Cat wheel loaders are among the most fuel efficient machines in the industry. Several features contribute to this excellent fuel efficiency:
  • Performance Series Buckets - Deliver faster fill times and better material retention, ultimately reducing cycle times while improving productivity and fuel efficiency.
  • Positive Flow Control Hydraulics - Provides only the hydraulic flow required by the implement and steering systems for improved fuel efficiency and greater rimpull.
  • ACERT Engine - Advanced engine controls maximizes power and efficiency.
  • Economy Mode - Featuring On Demand Throttle, Economy Mode optimizes power for maximum fuel savings with minimal impact on production.
  • Engine Idle Shutdown - Automatic engine and electrical system shutdown conserves fuel.
  • Lock up Torque Converter - Transfers more power to the ground and optimizes fuel efficiency in all applications.
  • Advanced Productivity Electronic Control Strategy (APECS) - All new APECS transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points. Machine configuration, operator technique, and job site layout can impact fuel consumption.
  • Machine Configuration - Select the correct work tool and tire type based on machine application. Ensure proper inflation pressures. Utilize the Economy Mode setting for maximum efficiency.
  • Job Site Layout - Spot loading targets in the right position. Avoid traveling more than 1.5 tire revolutions during truck loading cycles. Reduce transport distance for load and carry cycles by optimizing job site layout.
  • Loading Bucket - Load in first gear. Raise and tilt bucket quickly and do not use a “pumping” motion. Avoid lift lever detent and use impeller clutch.
  • Loading Truck or Hopper - Do not raise the work tool any higher than necessary. Keep engine rpm low and unload in controlled manner.
  • Idle - Set the parking brake to engage Engine Idle Management System.
2479mm (98in)

Fork Width
2489 mm98 in

Width - Over Tines
2412 mm95 in

Width - Between Tines
2412 mm95 in

6.9m³ (9yd³) Serrated Edge

Capacity
6.9 m³9 yd³

Width
3970 mm156 in

Weight
4790 kg10540 lb

6.9m³ (9yd³) Performance Series

Capacity
6.9 m³9 yd³

Width
4020 mm158 in

Bucket Linkage
Pin-On

6.4m³ (8.3yd³) Performance Series

Capacity
6.4 m³8.3 yd³

Width
4020 mm158 in

Bucket Linkage
Pin-on

6.9m³ (9yd³) Performance Series

Capacity
6.9 m³9 yd³

Width
4020 mm158 in

Bucket Linkage
Pin-on

7.7m³ (10yd³) Performance Series

Capacity
7.7 m³10 yd³

Width
4020 mm158 in

Bucket Linkage
Pin-on

6.4m³ (8.3yd³) Serrated Edge

Capacity
6.4 m³8.3 yd³

Width
3968 mm156 in

Bucket Linkage
Pin-on

6.9m³ (9yd³) Serrated Edge

Capacity
6.9 m³9 yd³

Width
3968 mm156 in

Bucket Linkage
Pin-on

4.4m³ (5.75yd³) Iron Ore

Capacity
4.4 m³5.75 yd³

Width
3940 mm155 in

Bucket Linkage
Pin-On

4.7m³ (6.2yd³) Iron Ore

Capacity
4.7 m³6.2 yd³

Width
3922 mm154 in

Bucket Linkage
Pin-on

6.4m³ (8.3yd³) Performance Series

Capacity
6.4 m³8.3 yd³

Width
3986 mm157 in

Bucket Linkage
Pin-on

11.5m³ (15yd³)

Capacity
11.5 m³15 yd³

Width
4120 mm162 in

Bucket Linkage
Pin-On

11.5m³ (15yd³)

Capacity
11.5 m³15 yd³

Width
4120 mm162 in

Bucket Linkage
Pin-on

13m³ (17yd³)

Capacity
13 m³17 yd³

Width
4120 mm162 in

Bucket Linkage
Pin-on

6.4m³ (8.3yd³) Performance Series

Capacity - Adapters
6.4 m³8.3 yd³

Width
4080 mm161 in

Bucket Linkage
Pin-on

6.4m³ (8.3yd³) Performance Series

Capacity - Adapters
6.4 m³8.3 yd³

Width
4080 mm161 in

Bucket Linkage
Pin-on

988K

Width
2000 mm78.7 in

Height
858 mm33.8 in

Weight
1598 kg3523 lb

Specifications

Net Power403 kW541 HP
Engine ModelCat® C18 ACERT™
Bore145 mm5.7 in
Stroke183 mm7.2 in
Displacement18.1 l1105 in³
Torque Rise58 %58 %
Rated Speed1,700 rpm
EmissionsU.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross - ISO 14396432 kW580 HP
Net Power - SAE J1349403 kW541 HP
Peak Power Speed1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396432 kW580 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995439 kW588 HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349403 kW541 HP
Peak Torque - 1,200 rpm2852 N·m2104 lb/ft
Operating Weight51062 kg112574 lb
Bucket Capacity Range4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - High Lift773-775
Cat Truck Match - Standard770-772
Rated Payload - Loose Material14.5 t16 t
Rated Payload - Quarry Face11.3 t12.5 t
Transmission TypeCat planetary power shift
Forward - 16.5 km/h4 mile/h
Forward - 211.6 km/h7.2 mile/h
Forward - 320.4 km/h12.7 mile/h
Forward - 434.7 km/h21.6 mile/h
Reverse - 17.5 km/h4.7 mile/h
Reverse - 213.3 km/h8.3 mile/h
Reverse - 323.2 km/h14.4 mile/h
Direct Drive - Forward 1Lock-up disabled
Direct Drive - Forward 212.5 km/h7.8 mile/h
Direct Drive - Forward 322.3 km/h13.9 mile/h
Direct Drive - Forward 439.3 km/h24.4 mile/h
Direct Drive - Reverse 18 km/h5 mile/h
Direct Drive - Reverse 214.3 km/h8.9 mile/h
Direct Drive - Reverse 325.5 km/h15.8 mile/h
Cylinders, Double Acting - Lift, Bore and Stroke210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke269 mm × 685 mm (8.7 in × 27 in)
Lift/Tilt SystemVariable displacement piston
Lift/Tilt System - CircuitEH- Positive Flow Control, Flow Sharing
Maximum Flow52 l/min13.7 gal/min
Maximum Flow at 1,400-1,860 rpm580 l/min153 gal/min
Pilot SystemVariable displacement piston
Relief Valve Setting3800 kPa551 psi
Relief Valve Setting - Lift/Tilt32800 kPa4757 psi
Fuel Tank712 l188 gal (US)
Cooling System120 l31.7 gal (US)
Crankcase60 l15.9 gal (US)
Transmission120 l31.7 gal (US)
Hydraulic System - Tank Only240 l63.4 gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)33 l8.7 gal (US)
Differential - Final Drives - Front186 l49.1 gal (US)
Differential - Final Drives - Rear186 l49.1 gal (US)
Hydraulic System Factory Fill475 l125.5 gal (US)
Bucket Capacities4.7-13 m3 (6.2-17 yd3)
FrontFixed
RearTrunnion
Oscillation Angle13°
BrakesSAE J1473 OCT90, ISO 3450:1992
Maximum Flow270 l/min71.3 gal/min
Relief Valve Setting - Steering30000 kPa4351 psi
Steering Cycle Times - High Idle3.4 s3.4 s
Steering Cycle Times - Low Idle5.6 s5.6 s
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Total Steering Angle86°
Dump2.2 s2.2 s
Lower Float Down3.5 s3.5 s
Rack Back4.5 s4.5 s
Raise8 s8 s
Total Hydraulic Cycle Time - Empty Bucket18.2 s18.2 s
Machine Sound Level (ISO 6395)111 dB(A)111 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)
Machine Sound Level (ISO 6395)109 dB(A)109 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)
Coolant (Validated by Test Cell Fill Quantities)125 l33 gal (US)
Transmission - Validated by Test Cell Fill Quantities110 l29 gal (US)
Machine Sound Level (ISO 6395)112 dB(A)112 dB(A)
Operator Sound Level ( ISO 6396)73 dB(A)73 dB(A)
Machine Sound Level (ISO 6395)110 dB(A)110 dB(A)
Operator Sound Level (ISO 6396)72 dB(A)72 dB(A)

Equipment

988K Standard Equipment

  • ELECTRICAL
    • Alarm, back-up
    • Alternator, single 150 amp
    • Batteries, dry
    • Converter, 10/15 amp, 24V to 12V
    • Lighting system (halogen, work lights, access and service platform lighting)
    • Starting and charging system, 24V
    • Starter emergency start receptacle
    • Starter lockout in bumper
    • Transmission lockout in bumper
  • OPERATOR ENVIRONMENT
    • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
    • Air conditioner
    • Cat Detect Vision, rear vision camera system
    • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
    • Controls, lift and tilt function
    • Heater, defroster
    • Horn, electric
    • Instrumentation, gauges: – Coolant temperature – Engine hour meter – Hydraulic oil temperature – Power train oil temperature
    • Light, cab, dome
    • Lunchbox, beverage holders
    • Mirrors, rearview (externally mounted)
    • Rimpull Control System
    • Seat, Cat Comfort (cloth), air suspension, six-way adjustable
    • Seat belt minder
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC Control System
    • UV glass
    • Transmission gear indicator
    • Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
    • Wet-Arm wipers/washers (front and rear): – Intermittent front and rear wipers
    • Lights, directional
  • POWER TRAIN
    • Brakes, oil-cooled, multi-disc, service/secondary
    • Case drain screens
    • Crankcase guard
    • Electro hydraulic parking brake
    • Engine, C18 ACERT MEUI diesel, turbocharged/aftercooled
    • Ground level engine shutoff
    • Turbine precleaner, engine air intake
    • Radiator, Aluminum Modular Radiator (AMR)
    • Starting aid, ether, automatic
    • Throttle lock, electronic
    • Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
    • Transmission, planetary powershift, 4F/3R electronic control
    • Manual switch and automatic fuel priming
    • Cat Production Measurement ready
  • OTHER
    • Automatic bucket lift kickout/positioner
    • Base machine price includes a rim allowance
    • Hydraulically driven demand fan
    • Couplings, Cat O-ring face seals
    • Doors, service access (locking)
    • Ecology drains for engine, radiator, hydraulic tank
    • Fuel tank, 731 L (188 gal)
    • Hitch, drawbar with pin
    • Hoses, Cat XT™
    • Hydraulic, steering and brake filtration/screening system
    • Cat Clean Emission Module
    • Oil sampling valves
    • Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
    • Rear access to cab and service platform
    • Steering, load sensing
    • Toe kicks
    • Vandalism protection caplocks

988K Optional Equipment

  • POWER TRAIN
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling – software
    • Cat Production Measurement
  • OPERATOR ENVIRONMENT
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
    • Handrail mounted mirrors
  • MISCELLANEOUS ATTACHMENTS
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler

360° Interactive

Exterior

Interior

Benefits and Features

Efficiency

Efficiency

Cat C18 ACERT™ Engine
Cat C18 ACERT™ Engine - The Cat C18 ACERT engine is built and tested to meet your most demanding applications while meeting Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent emission standards.
  • Fully integrated electronic engine controls works in concert with the entire machine to make your fuel go farther.
  • Use less fuel idling with Engine Idle Shutdown.
  • Maximized durability with Delayed Engine Shutdown.
Cat Planetary Powershift Transmission
Cat Planetary Powershift Transmission - Featuring all new Advanced Productivity Electronic Control Shifting (APECS) transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points.
Impeller Clutch Torque Converter (ICTC)
Impeller Clutch Torque Converter (ICTC) - Enable your operators to maximize efficiency by varying machine rimpull while putting more horsepower to hydraulics.
  • Reduced tire wear
  • Enables full throttle shifts for faster cycle times
  • Provides smooth approach to the dump target for less spillage and faster cycle times.
Cat Torque Converter with Lock-up Clutch
Cat Torque Converter with Lock-up Clutch -
  • Eliminates TC losses while lowering system heat
  • Improves travel speeds
  • Reduces cycle times in load and carry operations
Economy Mode
Economy Mode - Enabling maximum productivity and efficiency, all day every day. The 988K systems work hard to save you fuel through advanced technologies. Utilizing On Demand Throttle, operators maintain normal operation with the left pedal and implements while the 988K manages the engine speed.
  • Provides similar control and feel to our traditional throttle lock feature.
  • Efficiency of manual throttle and the ergonomics of throttle lock operation.
  • Reduced fuel consumption by up to 20% compared to the 988H.

Structures

Structures

Robust Structures - Your bottom line is improved by highly durable structures that achieve multiple life cycles and withstand the toughest loading conditions.
  • Full box-section rear frame resists torsional shock and twisting forces.
  • Heavy-duty steering cylinder mounts efficiently transmit steering loads into the frame.
  • Axle mounting has been optimized for increased structural integrity.
  • Lower hitch pin, frame plate, and bearing size have been increased for longer life.
Lift Arms
Lift Arms -
  • Excellent visibility to the bucket edges and work area through a Z-bar design.
  • High load stresses are absorbed by the solid steel lift arms.
  • Enhance strength in key pin areas through the use of one piece castings.
  • Stress relieved lift arms increase durability and lengthen time to repair.
Front Linkage
Front Linkage - To ensure long life and reliability, the linkage pin joints feature a greased pin design with an auto lube system attachment available from the factory.

Power Train

Power Train

Steering and Transmission Integrated Control System (STIC™)
Steering and Transmission Integrated Control System (STIC™) - Experience maximum responsiveness and control with STIC that combines directional selection, gear selection and steering into a single lever.
  • Simple side-to-side motion turns machine right or left, minimizing operator movements.
  • Easy to operate finger controlled gear selection.
  • Smoother, faster cycles and less operator fatigue through the use of low effort integrated controls.
Cat Planetary Powershift Transmission
Cat Planetary Powershift Transmission - Building your success begins with a best-in-class transmission designed specifically for mining applications.
  • Consistent, smooth shifting and efficiency through integrated electronic controls that utilize Advanced Productivity Electronic Control Strategy (APECS).
  • Long life and reliability through heat treat gear and metallurgy.
  • Four forward and three reverse speeds to match your application.
Cat C18 ACERT Engine
Cat C18 ACERT Engine - Durability and efficiency at the heart of your 988K comes from the Cat C18 ACERT Engine. Optimum performance is built in through the use of a 6 cylinder, four-stroke design.
  • Optimized performance and quick engine response with an electronic control module.
  • Reliable efficiency with complete control over injection timing, duration and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
  • Extended engine life and improved fuel efficiency with reduced rated speed.
  • Designed to meet Tier 4 Final/Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent emission standards.
Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) - Lower your cost per ton utilizing advanced ICTC and RCS for modulated rimpull.
  • Reduce tire slippage and wear by modulating rimpull from 100 to 25 percent while depressing left pedal. After 25 percent rimpull is achieved the left pedal applies the brake.
  • Reduce the potential for wheel slippage without reducing hydraulic efficiency with RCS.
  • Improve fuel efficiency in certain applications with our lock-up clutch torque converter providing direct drive.

Hydraulics

Hydraulics

Positive Flow Control Hydraulics
Positive Flow Control Hydraulics - Increase efficiency through our Positive Flow Control (PFC) Hydraulic System. PFC has concurrent pump and valve control. By optimizing pump control, hydraulic oil flow is proportionate to implement lever movement.
  • Fast, productive cycles are enabled by the fully variable implement pump.
  • Increase bucket feel and control through increased hydraulic response.
  • Consistent performance and efficiency with lower system heat.
  • Full hydraulic flow down to 1,400 engine rpm enabled by flow sharing technology.
Electro Hydraulic Controls
Electro Hydraulic Controls - Operators increase productivity with our responsive implements feature.
  • Operate comfortably through electronically controlled hydraulic cylinder stops.
  • Handle easy-to-use soft detent controls.
  • Conveniently set automatic implement kickouts from inside the cab.
Steering System
Steering System - Confident loader operation starts with precise machine control enabled by the 988K's load sensing hydraulic steering system.
  • Increase efficiency with our variable displacement piston pumps.
  • Achieve precise positioning for easy loading in tight areas with 43 degrees of steering articulation.
  • Enhance operator comfort with integrated steering and transmission control functions.
Filtration System
Filtration System - Benefit from extended performance and reliability of your hydraulic system with our advanced filtration system.
  • Case drain screens.
  • Hydraulic oil cooler return filter.
  • Pilot filter.
  • Return screens inside hydraulic tank.
  • Axle oil cooler screens if equipped.

Operator Station

Operator Station

Your operators can work more efficiently and stay comfortable with our customer-inspired cab features.
Entry and Exit - Enter and exit the cab easily and safely with these newly designed, ergonomic features.
  • Fold up STIC steer/armrest.
  • Reduced access stairway angles.
  • Standard stairway lighting.
Cat Comfort Series III Seat
Cat Comfort Series III Seat - Enhance comfort and helps reduce operator fatigue with Cat Comfort Series III seat.
  • Mid back design and extra thick, contoured cushions.
  • Air suspension system.
  • Easy-to-reach seat levers and controls for six way adjustments.
  • Seat-mounted implement pod and STIC steer that moves with the seat.
  • 76 mm (3 in) wide retractable seat belt.
Control Panel
Control Panel - Ergonomic placement of switches and information display keep your operators comfortable all day every day.
  • Large backlit membrane switches feature LED activation indicators.
  • Switches feature ISO symbols for quick function identification.
  • Two position rocker switch activates the electro hydraulic park brake.
Environment
Environment - Your operator's productivity is enhanced with our clean, comfortable cab environment.
  • Experience reduced vibrations from isolated cab mounts and seat air suspension.
  • Maintain desired cab temperature with automatic temperature controls.
  • Pressurized cab with filtered air.
  • Reduced operator sound levels.
  • Convenient floor storage tray/lunch box.

Technology Solutions

Technology Solutions

Integrated electronics provide flexible levels of information to both the site and the operator. This integration creates a smart machine and more informed operator, maximizing the productivity of both.
Information Display
Information Display - We have worked hard to help our customers and operators perform at their best through our newly upgraded touch screen information display.
  • Intuitive operation and easy navigation with our enhanced user interface.
  • Decrease service time by keeping operators informed about machine systems.
  • Quick on-the-go weighing with the Cat Production Measurement.
Cat Product Link™
Cat Product Link™ - Take the guesswork out of asset management with Product Link remote monitoring.
  • Remote access to information through the easy-to-use VisionLink® interface.
  • Maximize uptime by staying informed on machine systems and diagnostic codes.
  • Track machine with utilization, fuel usage, and payload summaries.
  • Stay up to date on machine location, service meter hours, and reporting status.
Vital Information Management System (VIMS™) - Connect directly to the machine for access to a wide range of sensor information and enhanced machine data.
  • Create productivity reports with payload and work cycle segmentation.
  • Identify operator training needs through productivity data.
  • Detailed data logging of machine parameters and diagnostic codes.
  • Track machine sensor information with trend analysis and histograms to monitor machine health.

Serviceability

Serviceability

  • Safe and convenient service with ground level or platform access and grouped service points.
  • Swing-out doors on both sides of the engine compartment provide easy access to important daily service checks.
  • Ecology drains for ease of service and prevention of spilling potential environmental contaminants.
  • Reduce downtime with VIMS system notifications so your operators and technicians can resolve any problems before failure.
  • Ground level access to transmission control valves.

Customer Support

Customer Support

Legendary Cat Dealer Support - A valued partner, your Cat dealer is available whenever you need them.
  • Preventive maintenance programs and guaranteed maintenance contracts.
  • Best-in-class parts availability.
  • Improve your efficiency with operator training.
  • Genuine Cat Remanufactured parts.

Safety

Safety

We are constantly improving our products in an effort to provide a safe work environment for the operator and those who work on your job site.
Machine Access
Machine Access -
  • Left and right hand stairs with 45 degree angle enhance safety for operators getting on and off the 988K.
  • Continuous walkway with non-skid surfaces are designed into the service areas.
  • Maintain three points of contact at all times through ground level or platform accessible service areas.
Visibility -
  • Optional heated mirrors ensure enhanced visibility for safe operation.
  • Standard Cat Vision or optional Cat Detect with radar increase operator awareness around the machine.
  • Optional HID or LED lights provide excellent workspace visibility.
  • Optional cab mounted LED warning beacons.
Operator Environment
Operator Environment -
  • Reduced vibrations to the operator with isolated cab mounts and seat mounted implement and steering controls.
  • Low interior sound levels.
  • Pressurized cab with filtered air.
  • Standard 76 mm (3 in) seat belts on the operator seat.

Sustainability

Sustainability

Reducing the Impact to the Environment - Sustainability is designed and built into our 988K's features.
  • Burns up to 20% less fuel than the previous model to minimize your carbon footprint.
  • Engine Idle Shutdown can help you save fuel by avoiding unnecessary idling.
  • Reduce waste with our maintenance free batteries.
  • Built for multiple lives, the Cat 988 is one of the most rebuilt products. To assist with maximizing machine life, Caterpillar provides a number of sustainable options such as our Reman and Certified Rebuild programs. In these programs, reused or remanufactured components can deliver cost savings of 40 to 70 percent, which lowers operating cost while benefiting the environment.
  • Caterpillar offers retrofit packages to bring new features to older machines, maximizing your resource. And, when you go through the Cat Certified Rebuild program, these retrofit kits are part of the rebuild process.

System Match Efficiency

System Match Efficiency

Efficient Combination - For full truck payloads with minimum loading time, an efficient loading/hauling system starts with a perfect match. Cat wheel loaders are matched with Cat off-highway trucks to maximize volume of material moved at the lowest operating cost per ton. The 988K equipped with the standard linkage will pass match the 770 (36 tonnes/40 tons) in 3 passes and the 772 (45 tonnes/50 tons) in 4 passes. Equipped with a high lift linkage the 988K is capable of loading a 773 (56 tonnes/61.7 tons) in 5 passes and the 775 (64 tonnes/70 tons) in 6 passes.

Bucket Ground Engaging Tools

Bucket Ground Engaging Tools

Enhance the productivity of your loader and protect your investment in buckets with our Ground Engaging Tools (GET). Your knowledgeable Cat dealer will work with you to understand your application and needs for the GET that is best for you.
Performance Series Buckets - Performance Series Buckets feature an optimized profile maximizing material retention and minimizing dig time, translating into significant productivity and fuel efficiency improvements. All 988K buckets are manufactured with the Performance Series design.
Rock Bucket
Rock Bucket - Applications: Face loading tightly compacted pit materials.
General Purpose Bucket - Applications: Loading loose, stockpiled material.
GET Options - Multiple GET options are available to customize your 988K to your application, such as:
  • Sidebar protectors.
  • General duty and penetration tips.
  • Standard and half arrow segments.

Operating Costs

Operating Costs

Data from customer machines show Cat wheel loaders are among the most fuel efficient machines in the industry. Several features contribute to this excellent fuel efficiency:
  • Performance Series Buckets - Deliver faster fill times and better material retention, ultimately reducing cycle times while improving productivity and fuel efficiency.
  • Positive Flow Control Hydraulics - Provides only the hydraulic flow required by the implement and steering systems for improved fuel efficiency and greater rimpull.
  • ACERT Engine - Advanced engine controls maximizes power and efficiency.
  • Economy Mode - Featuring On Demand Throttle, Economy Mode optimizes power for maximum fuel savings with minimal impact on production.
  • Engine Idle Shutdown - Automatic engine and electrical system shutdown conserves fuel.
  • Lock up Torque Converter - Transfers more power to the ground and optimizes fuel efficiency in all applications.
  • Advanced Productivity Electronic Control Strategy (APECS) - All new APECS transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points. Machine configuration, operator technique, and job site layout can impact fuel consumption.
  • Machine Configuration - Select the correct work tool and tire type based on machine application. Ensure proper inflation pressures. Utilize the Economy Mode setting for maximum efficiency.
  • Job Site Layout - Spot loading targets in the right position. Avoid traveling more than 1.5 tire revolutions during truck loading cycles. Reduce transport distance for load and carry cycles by optimizing job site layout.
  • Loading Bucket - Load in first gear. Raise and tilt bucket quickly and do not use a “pumping” motion. Avoid lift lever detent and use impeller clutch.
  • Loading Truck or Hopper - Do not raise the work tool any higher than necessary. Keep engine rpm low and unload in controlled manner.
  • Idle - Set the parking brake to engage Engine Idle Management System.

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988K

Width
2000 mm78.7 in

Height
858 mm33.8 in

Weight
1598 kg3523 lb

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