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988 Wheel Loader

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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.

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 emission standards, Brazil MAR-1 and China Nonroad Stage IV emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA, and U.S. EPA Tier 2 and EU Stage II
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
Net Power - SAE J1349:2011: 538hp
Engine Power - ISO 14396:2002: 580hp
Gross Power - SAE J1995:2014: 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

Sound Performance - Tier 4 Final / Stage V - Standard

Operator Sound Pressure Level (ISO 6396:2008): 73dB(A)
Machine Sound Power Level (ISO 6395:2008): 111dB(A)

Sound Performance - Tier 3 / Stage III - Standard

Operator Sound Pressure Level (ISO 6396:2008): 73dB(A)
Machine Sound Power Level (ISO 6395:2008): 112dB(A)

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