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988 Wheel Loader

988 Wheel Loader

Large Wheel Loaders

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 low cost per ton. Introduced in 1963, the 988 has been an industry leader for 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

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PROVEN RELIABILITY
        
  • Cat C18 engine is built and tested to meet your most demanding applications.
    •     
  • Cat torque converter with lock-up clutch helps reduce torque converter losses and lowers system heat.
    •     
  • Maximum responsiveness with Steering and Transmission Integrated Control (STIC™).
LONG TERM VALUE AND DURABILITY
        
  • World-class transmission for long life and consistent, smooth shifting; specifically designed for mining applications.
    •     
  • Advanced productivity electronic control strategy (APECS) transmission controls for optimal momentum on grades.
PERFORMANCE AND PRODUCTIVITY
        
  • Superior digging, higher bucket fill factors, reduced dig times.
    •     
  • Improved visibility over the top of the linkage.
    •     
  • Operators can now monitor tire pressure during operation. Any change sending a fault code to VisionLink®, helps prevent premature tire failure.
PERFORMANCE WITH LESS FUEL
        
  • Economy mode helps optimize engine speed control for reduced fuel consumption no matter if operating in manual throttle or throttle lock.
    •     
  • Flow sharing hydraulics provide full flow at reduced engine rpm.
    •     
  • Fully integrated electronic engine controls help make your fuel go farther.
PRODUCTIVITY WITH TECHNOLOGY
        
  • Cat Technologies developed to monitor, manage, and enhance your jobsite operations.
    •     
  • Cat Payload provides accurate weighing* of the materials you are loading and hauling. Payload data is displayed in real-time to improve productivity and reduce overloading.
SAFETY FIRST
        
  • Achieve precise positioning for easy loading in tight areas with 43 degrees of steering articulation.
    •     
  • Precise machine control by load-sensing hydraulic steering system.
    •     
  • Reduced stairway angles and standard stairway lighting provide reduced risk of slips, trips, and falls due to better visbility of the steps and stairway.
SAVE ON SERVICE AND MAINTENANCE
        
  • Grouped service points provide easy access to critical daily service checks.
    •     
  • Swing-out engine compartment service doors.
    •     
  • Reduced waste with maintenance-free batteries.
    •     
  • Ecology drains to prevent spills and allow for easier service.
OPERATOR COMFORT AND CONTROL
        
  • World-class operator comfort and ergonomics.
    •     
  • Cat Premium Plus seat with standard features including leather finish, forced air heating and cooling, two-way thigh adjustment, power lumbar and back bolster adjustment, and dynamic end dampening to provide total comfort throughout the workday.
PURPOSE-BUILT SPECIALTY MODELS - BLOCK HANDLER
        
  • Delivers stability and durability with an optimized counterweight for block handling applications.
    •     
  • A high rimpull powertrain features a torque converter and transmission specially designed for this application to maximize rimpull.
    •     
  • An additional hydraulic valve with the quick coupler allows the operator to switch work tools and immediately lock the work tool during load and carry applications.
PURPOSE-BUILT SPECIALTY MODELS - MILLYARD
        
  • Unload a typical full-length log truck in a single pass with the larger lift and tilt cylinders and a unique tilt lever to maximize linkage force. Designed with more lift capacity and 26% more tilt capacity over the standard 988. 
    •     
  • Swing out fan radiator design for easy service in high-debris millyard applications helping to reduce maintenance and service down time. Auto reversing fan system to help dislodge debris and keep air flowing across the radiator cores. 
PURPOSE-BUILT SPECIALTY MODELS - STEEL MILL
        
  • Durable and reinforced attachments for operator comfort, safety, and easy machine access.
    •     
  • Radiator is designed for easy cleaning and to keep material from building up.
    •     
  • Auto reversing fan and easy access to cooling cores help keep cab at comfortable temperature.
PROVEN RELIABILITY
        
  • Cat C18 engine is built and tested to meet your most demanding applications.
    •     
  • Cat torque converter with lock-up clutch helps reduce torque converter losses and lowers system heat.
    •     
  • Maximum responsiveness with Steering and Transmission Integrated Control (STIC™).
    •     
  • Moves more material efficiently with improved power and control.
    •     
  • Durable construction withstands the toughest loading conditions and multiple lifecycles.
LONG TERM VALUE AND DURABILITY
        
  • World-class transmission for long life and consistent, smooth shifting; specifically designed for mining applications.
    •     
  • Advanced productivity electronic control strategy (APECS) transmission controls for optimal momentum on grades.
    •     
  • Positive flow control (PFC) hydraulic system helps increase efficiency, bucket feel, and responsiveness with consistent performance.
    •     
  • Advanced filtration system for extended performance and reliability of the hydraulic system.
    •     
  • Impeller clutch torque converter (ICTC) helps minimize tire spin by allowing torque to adjust to underfoot conditions.
PERFORMANCE AND PRODUCTIVITY
        
  • Superior digging, higher bucket fill factors, reduced dig times.
    •     
  • Improved visibility over the top of the linkage.
    •     
  • Operators can now monitor tire pressure during operation. Any change sending a fault code to VisionLink®, helps prevent premature tire failure.
    •     
  • Convenient, responsive, electro-hydraulic controls help increase operator productivity.
PERFORMANCE WITH LESS FUEL
        
  • Economy mode helps optimize engine speed control for reduced fuel consumption no matter if operating in manual throttle or throttle lock.
    •     
  • Flow sharing hydraulics provide full flow at reduced engine rpm.
    •     
  • Fully integrated electronic engine controls help make your fuel go farther.
    •     
  • Engine idle shutdown for less fuel used while idling.
    •     
  • Increased hydraulic speed and fast cycle times helps decrease idle and fuel burn, with optimal efficiency.
PRODUCTIVITY WITH TECHNOLOGY
        
  • Cat Technologies developed to monitor, manage, and enhance your jobsite operations.
    •     
  • Cat Payload provides accurate weighing* of the materials you are loading and hauling. Payload data is displayed in real-time to improve productivity and reduce overloading.
    •     
  • Cat Detect enhances awareness of the environment around working equipment and provides alerts to help keep people and assets safe on the jobsite.
    •     
  • Product Link™ wirelessly connects you to your equipment, giving you access to essential information you need to know to run your business.
    •     
  • Gain valuable insight into how your machine or fleet is performing.
    •     
  • Optional advanced productivity plan provides comprehensive actionable information to help you manage and improve the productivity and profitability of your operations.
    •     
  • Improved cycle times and bucket fill factors with optional operator coaching.
    •     
  • Optimized dig segment cycle with optional operator assist – tire slip prevention, auto set tires, and lift stall prevention.
    •     
  • Easy to operate in single pedal with dynamic braking and operator
        assist features that allow faster training of new operators.
    •     
  • Increase operator efficiency with Operator Coaching through onboard
        tips for truck loading operations.
*Not legal for trade.
SAFETY FIRST
        
  • Achieve precise positioning for easy loading in tight areas with 43 degrees of steering articulation.
    •     
  • Precise machine control by load-sensing hydraulic steering system.
    •     
  • Reduced stairway angles and standard stairway lighting provide reduced risk of slips, trips, and falls due to better visbility of the steps and stairway.
    •     
  • Computerized monitoring system with warning indicators.
    •     
  • Standard Cat Vision enhances visibility behind the machine, helping you work safely and confidently.
    •     
  • Pressurized cabin with filtered air and reduced sound levels.
SAVE ON SERVICE AND MAINTENANCE
        
  • Grouped service points provide easy access to critical daily service checks.
    •     
  • Swing-out engine compartment service doors.
    •     
  • Reduced waste with maintenance-free batteries.
    •     
  • Ecology drains to prevent spills and allow for easier service.
    •     
  • Vehicle Information Management System (VIMS™) notifications to help resolve problems before failure.
    •     
  • Ground level access to transmission control valves.
    •     
  • Long life, rebuildability, and high resale value.
OPERATOR COMFORT AND CONTROL
        
  • World-class operator comfort and ergonomics.
    •     
  • Cat Premium Plus seat with standard features including leather finish, forced air heating and cooling, two-way thigh adjustment, power lumbar and back bolster adjustment, and dynamic end dampening to provide total comfort throughout the workday.
    •     
  • Easy-to-reach levers and seat-mounted implement pod to help reduce fatigue.
    •     
  • Ergonomic switch placement and displays with LED indicators.
    •     
  • Two-position rocker switch activates the electro-hydraulic parking brake.
    •     
  • Reduced vibrations from isolated cab mounts and seat air suspension.
    •     
  • Automatic cab temperature controls.
PURPOSE-BUILT SPECIALTY MODELS - BLOCK HANDLER
        
  • Delivers stability and durability with an optimized counterweight for block handling applications.
    •     
  • A high rimpull powertrain features a torque converter and transmission specially designed for this application to maximize rimpull.
    •     
  • An additional hydraulic valve with the quick coupler allows the operator to switch work tools and immediately lock the work tool during load and carry applications.
    •     
  • Purpose-built tilt and lift cylinders on the linkage help improve load control and ensure safe and long lasting operation.
    •     
  • Ride control acts as a shock absorber, providing the operator with a smoother ride over rough terrain.
PURPOSE-BUILT SPECIALTY MODELS - MILLYARD
        
  • Unload a typical full-length log truck in a single pass with the larger lift and tilt cylinders and a unique tilt lever to maximize linkage force. Designed with more lift capacity and 26% more tilt capacity over the standard 988. 
    •     
  • Swing out fan radiator design for easy service in high-debris millyard applications helping to reduce maintenance and service down time. Auto reversing fan system to help dislodge debris and keep air flowing across the radiator cores. 
    •     
  • Additional counterweight to help increase stability for improved confidence while maneuvering with full loads. 
    •     
  • Purpose-built lift arm with lowered cross member to help increase visibility to the tips of the forks helping to increase the speed when lining up the load and reduce operator movements to see the forks. 
PURPOSE-BUILT SPECIALTY MODELS - STEEL MILL
        
  • Durable and reinforced attachments for operator comfort, safety, and easy machine access.
    •     
  • Radiator is designed for easy cleaning and to keep material from building up.
    •     
  • Auto reversing fan and easy access to cooling cores help keep cab at comfortable temperature.
    •     
  • Equipped with extra guarding and heat protection for critical machine functions.
    •     
  • Flame resistant ecosafe hydraulic fluid available as an option.
    •     
  • Performance series, serrated edge slag, straight edge slag, and slag buckets help maximize material retention and minimize dig time.
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Engine

Net Power
541HP
Engine Model
Cat® C18 ™
Bore
5.7in
Stroke
7.2in
Displacement
1105in³
Torque Rise
58%
Rated Speed
1700/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396
580HP
Peak Power Speed
1500/rpm
Peak Power Speed - 1,500 rpm - Gross - SAE J1995
588HP
Net Power - SAE J1349
541HP
Peak Torque - 1,200 rpm
2230lb/ft
Emissions
U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
541HP
Gross - ISO 14396
580HP
Engine Power - ISO 14396
580HP
Gross Power - SAE J1995
588HP

Air Conditioning System

Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Operating Specifications

Operating Weight
112574lb
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Rated Payload - Loose Material
16t
Rated Payload - Quarry Face
12.5t
Cat Truck Match - High Lift
773～775
Cat Truck Match - Standard
770～772

Transmission

Transmission Type
Cat planetary powershift
Forward - 1
4mile/h
Forward - 2
7.2mile/h
Forward - 3
12.7mile/h
Forward - 4
21.6mile/h
Reverse - 1
4.7mile/h
Reverse - 2
8.3mile/h
Reverse - 3
14.4mile/h
Direct Drive - Forward 2
7.8mile/h
Direct Drive - Reverse 2
8.9mile/h
Direct Drive - Forward 4
24.4mile/h
Direct Drive - Reverse 3
15.8mile/h
Direct Drive - Reverse 1
5mile/h
Direct Drive - Forward 3
13.9mile/h
Direct Drive - Forward 1
Lock-up disabled

Hydraulic System - Lift/Tilt

Relief Valve Setting - Main
551psi
Cylinders, Double Acting - Tilt, Bore and Stroke
269 mm × 685 mm (8.7 in × 27 in)
Pilot System
Variable displacement piston
Maximum Flow at 1,400-1,860 rpm
153gal/min
Relief Valve Setting - Lift/Tilt
4757psi
Maximum Flow
13.7gal/min
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)
Lift/Tilt System
Variable displacement piston
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing

Service Refill Capacities

Fuel Tank
188gal (US)
Cooling System
31.7gal (US)
Crankcase
15.9gal (US)
Transmission
31.7gal (US)
Hydraulic System - Tank Only
63.4gal (US)
Differential - Final Drives - Rear
49.1gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)
8.7gal (US)
Differential - Final Drives - Front
49.1gal (US)
Hydraulic System Factory Fill
125.5gal (US)
Coolant (Validated by Test Cell Fill Quantities)
33gal (US)
Transmission - Validated by Test Cell Fill Quantities
29gal (US)
Diesel Exhaust Fluid Tank
8.7gal (US)

Buckets

Bucket Capacities
4.7-13 m3 (6.2-17 yd3)

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
13 °

Brakes

Brakes
ISO 3450:2011

Hydraulic System - Steering

Maximum Flow
71.3gal/min
Total Steering Angle
86 °
Relief Valve Setting - Steering
4351psi
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Steering Cycle Times - Low Idle
5.6s
Steering Cycle Times - High Idle
3.4s

Hydraulic Cycle Time (1,400-1,860 rpm)

Dump
2.2s
Total Hydraulic Cycle Time - Empty Bucket
18.2s
Rack Back
4.5s
Lower Float Down
3.5s
Raise
8s

Sound Performance - Tier 4 Final/Stage IV - Standard

Machine Sound Level (ISO 6395)
111dB(A)
Operator Sound Level (ISO 6396)
72dB(A)

Sound Performance - Tier 4 Final/Stage IV: Suppression

Operator Sound Level (ISO 6396)
72dB(A)
Machine Sound Level (ISO 6395)
109dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Machine Sound Level (ISO 6395)
112dB(A)
Operator Sound Level (ISO 6396)
73dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

Machine Sound Level (ISO 6395)
110dB(A)
Operator Sound Level (ISO 6396)
72dB(A)

Operator's Cab

ROPS/FOPS
ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards

Sound Performance - Tier 4 Final/EU Stage V - Standard

Operator Sound Level (ISO 6396)
72dB(A)
Machine Sound Level (ISO 6395)
111dB(A)
Note (1)
The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (2)
Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS
13.8ft
Ground to Top of Hood
10.9ft
Ground to Top of Exhaust Stacks
14.8ft
Rear Axle - Centerline to Bumper
10.5ft
Front Axle Centerline to Bucket Tip
14ft
Wheel Base
14.9ft
Maximum Overall Length
39.3ft
Ground to Lower Hitch Clearance
1.9ft
Clearance at Maximum Lift
11.9ft
B-Pin Height - Maximum Lift
18ft
Maximum Overall Height - Bucket Raised
24.5ft
Reach - Maximum Lift
6.5ft

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS
13.8ft
Ground to Top of Exhaust Stacks
14.8ft
Ground to Top of Hood
10.9ft
Rear Axle - Centerline to Bumper
10.5ft
Front Axle Centerline to Bucket Tip
15.3ft
Wheel Base
14.9ft
Maximum Overall Length
40.7ft
Ground to Lower Hitch Clearance
1.9ft
Clearance at Maximum Lift
13.3ft
B-Pin Height - Maximum Lift
19.3ft
Maximum Overall Height - Bucket Raised
25.8ft
Reach - Maximum Lift
6.8ft

Standard/Optional Features

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • 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
    • Jump 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 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, deluxe
    • 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 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, 712 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

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • 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
  • Additional Equipment
    • Additional counterweight
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries), engine block heater 120V or 240V, heated fuel lines
  • Other Optional Configurations
    • Aggregate Handler

Take The Virtual Product Tour To Explore The Features And Benefits of the 988 Wheel Loader

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988 Large Wheel Loaders

Operating Weight
112574 lb
Net Power
541 HP
Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Gross Power - SAE J1995
588 HP
Selected Model

903D Compact Wheel Loaders

Operating Weight
9414 lb
Maximum Gross Power
42 HP
Bucket Capacities
0.6-1.0 m3 (0.8-1.3 yd3)
View Full Specs

907 Compact Wheel Loaders

Operating Weight
12765 lb
Maximum Gross Power
74.7 HP
Bucket Capacities
0.75-1.55 m³ (1.0-2.0 yd³)
View Full Specs

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