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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 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.

Engine

Units:
Net Power 541.0 HP 403.0 kW Less
Engine Model Cat® C18 ACERT™ Cat® C18 ACERT™ Less
Bore 5.7 in 145.0 mm Less
Stroke 7.2 in 183.0 mm Less
Displacement 1105.0 in³ 18.1 l Less
Torque Rise 58.0 % 58.0 % Less
Rated Speed 1,700 rpm 1,700 rpm Less
Emissions U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent Less
Gross - ISO 14396 580.0 HP 432.0 kW Less
Net Power - SAE J1349 541.0 HP 403.0 kW Less
Peak Power Speed 1,500 rpm 1,500 rpm Less
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580.0 HP 432.0 kW Less
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588.0 HP 439.0 kW Less
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541.0 HP 403.0 kW Less
Peak Torque - 1,200 rpm 2104.0 lb/ft 2852.0 N·m Less

Operating Specifications

Operating Weight 112574.0 lb 51062.0 kg Less
Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3) 4.7-13 m3 (6.2-17 yd3) Less
Cat Truck Match - High Lift 773-775 773-775 Less
Cat Truck Match - Standard 770-772 770-772 Less
Rated Payload - Loose Material 16.0 t 14.5 t Less
Rated Payload - Quarry Face 12.5 t 11.3 t Less

Transmission

Transmission Type Cat planetary power shift Cat planetary power shift Less
Forward - 1 4.0 mile/h 6.5 km/h Less
Forward - 2 7.2 mile/h 11.6 km/h Less
Forward - 3 12.7 mile/h 20.4 km/h Less
Forward - 4 21.6 mile/h 34.7 km/h Less
Reverse - 1 4.7 mile/h 7.5 km/h Less
Reverse - 2 8.3 mile/h 13.3 km/h Less
Reverse - 3 14.4 mile/h 23.2 km/h Less
Direct Drive - Forward 1 Lock-up disabled Lock-up disabled Less
Direct Drive - Forward 2 7.8 mile/h 12.5 km/h Less
Direct Drive - Forward 3 13.9 mile/h 22.3 km/h Less
Direct Drive - Forward 4 24.4 mile/h 39.3 km/h Less
Direct Drive - Reverse 1 5.0 mile/h 8.0 km/h Less
Direct Drive - Reverse 2 8.9 mile/h 14.3 km/h Less
Direct Drive - Reverse 3 15.8 mile/h 25.5 km/h Less

Hydraulic System - Lift/Tilt

Cylinders, Double Acting - Lift, Bore and Stroke 210 mm × 1050 mm (8.7 in × 41.3 in) 210 mm × 1050 mm (8.7 in × 41.3 in) Less
Cylinders, Double Acting - Tilt, Bore and Stroke 269 mm × 685 mm (8.7 in × 27 in) 269 mm × 685 mm (8.7 in × 27 in) Less
Lift/Tilt System Variable displacement piston Variable displacement piston Less
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing EH- Positive Flow Control, Flow Sharing Less
Maximum Flow 13.7 gal/min 52.0 l/min Less
Maximum Flow at 1,400-1,860 rpm 153.0 gal/min 580.0 l/min Less
Pilot System Variable displacement piston Variable displacement piston Less
Relief Valve Setting 551.0 psi 3800.0 kPa Less
Relief Valve Setting - Lift/Tilt 4757.0 psi 32800.0 kPa Less

Service Refill Capacities

Fuel Tank 188.0 gal (US) 712.0 l Less
Cooling System 31.7 gal (US) 120.0 l Less
Crankcase 15.9 gal (US) 60.0 l Less
Transmission 31.7 gal (US) 120.0 l Less
Hydraulic System - Tank Only 63.4 gal (US) 240.0 l Less
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only) 8.7 gal (US) 33.0 l Less
Differential - Final Drives - Front 49.1 gal (US) 186.0 l Less
Differential - Final Drives - Rear 49.1 gal (US) 186.0 l Less
Hydraulic System Factory Fill 125.5 gal (US) 475.0 l Less
Coolant (Validated by Test Cell Fill Quantities) 33.0 gal (US) 125.0 l Less
Transmission - Validated by Test Cell Fill Quantities 29.0 gal (US) 110.0 l Less

Buckets

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

Axles

Front Fixed Fixed Less
Rear Trunnion Trunnion Less
Oscillation Angle 13° 13° Less

Brakes

Brakes SAE J1473 OCT90, ISO 3450:1992 SAE J1473 OCT90, ISO 3450:1992 Less

Hydraulic System - Steering

Maximum Flow 71.3 gal/min 270.0 l/min Less
Relief Valve Setting - Steering 4351.0 psi 30000.0 kPa Less
Steering Cycle Times - High Idle 3.4 s 3.4 s Less
Steering Cycle Times - Low Idle 5.6 s 5.6 s Less
Steering System - Circuit Pilot, load sensing Pilot, load sensing Less
Steering System - Pump Piston, variable displacement Piston, variable displacement Less
Total Steering Angle 86° 86° Less

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

Dump 2.2 s 2.2 s Less
Lower Float Down 3.5 s 3.5 s Less
Rack Back 4.5 s 4.5 s Less
Raise 8.0 s 8.0 s Less
Total Hydraulic Cycle Time - Empty Bucket 18.2 s 18.2 s Less

Sound Performance - Tier 4 Final/Stage IV - Standard

Machine Sound Level (ISO 6395) 111.0 dB(A) 111.0 dB(A) Less
Operator Sound Level (ISO 6396) 72.0 dB(A) 72.0 dB(A) Less

Sound Performance - Tier 4 Final/Stage IV: Suppression

Machine Sound Level (ISO 6395) 109.0 dB(A) 109.0 dB(A) Less
Operator Sound Level (ISO 6396) 72.0 dB(A) 72.0 dB(A) Less

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Machine Sound Level (ISO 6395) 112.0 dB(A) 112.0 dB(A) Less
Operator Sound Level ( ISO 6396) 73.0 dB(A) 73.0 dB(A) Less

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

Machine Sound Level (ISO 6395) 110.0 dB(A) 110.0 dB(A) Less
Operator Sound Level (ISO 6396) 72.0 dB(A) 72.0 dB(A) Less

Efficiency

Structures

Power Train

Hydraulics

Operator Station

Technology Solutions

Serviceability

Customer Support

Safety

Sustainability

System Match Efficiency

Bucket Ground Engaging Tools

Operating Costs

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