988K Wheel Loader Steel Mill Arrangement

988K (Steel Mill Arrangement) Large Wheel Loader

988K Wheel Loader Steel Mill Arrangement

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.

Benefits & Features

Product Specs

Engine

Net Power
541.0hp
Engine Model
Cat® C18 ACERT™
Net Power - SAE J1349
541.0hp
Bore
5.7in
Stroke
7.2in
Displacement
1105.0in3
Torque Rise
58.0%
Rated Speed
1,700 rpm
Emissions
U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Gross (ISO 14396)
580.0hp
Peak Power Speed
1,500 rpm
Peak Power Speed @ 1,500 rpm: Gross - ISO 14396
580.0hp
Peak Power Speed @ 1,500 rpm: Gross - SAE J1995
588.0hp
Peak Power Speed @ 1,500 rpm: Net Power - SAE J1349
541.0hp
Peak Torque @ 1,200 rpm
2104.0lb ft

Operating Specifications

Operating Weight
112574.0lb
Rated Payload
12.5tons
Rated Payload - Standard
12.5tons
Bucket Capacity Range
6.4-7.6 m3 (8.3-10 yd3)
Cat Truck Match - Standard
770-772
Cat Truck Match - High Lift
773-775
Rated Payload - High Lift
12.5tons

Buckets

Bucket Capacities
5.4-6.3 m3 (7.0-8.3 yd3)

Transmission

Transmission Type
Cat planetary power shift
Forward 1
4.0mph
Forward 2
7.2mph
Forward 3
12.7mph
Forward 4
21.6mph
Reverse 1
4.7mph
Reverse 2
8.3mph
Reverse 3
14.4mph
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 2
7.8mph
Direct Drive - Forward 3
13.9mph
Direct Drive - Forward 4
24.4mph
Direct Drive - Reverse 1
5.0mph
Direct Drive - Reverse 2
8.9mph
Direct Drive - Reverse 3
15.8mph

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
±6°

Hydraulic System - Steering

Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Relief Valve Setting - Steering
4351.0psi
Maximum Flow
71.3gal/min
Steering Cycle Time (high idle)
3.4Seconds
Steering Cycle Time (low idle)
5.6Seconds
Total Steering Angle
80.0Degrees

Service Refill Capacities

Fuel Tank
181.0gal
Cooling System
31.7gal
Crankcase
15.9gal
Transmission
31.7gal
Differentials and Final Drives - Front
49.1gal
Differentials and Final Drives - Rear
49.1gal
Hydraulic System (tank only)
63.4gal
Diesel Exhaust Fluid Tank (Tier 4)
8.7gal
Hydraulic System Factory Fill
125.5gal

Sound Performance - Standard

Machine Sound Level (ISO 6395)
111.0dB(A)
Operator Sound Level (ISO 6396)
71.0dB(A)

Hydraulic System - Lift/Tilt

Cylinders, Double Acting: Lift, Bore and Stroke
210 mm × 1050 mm (8.3 in × 41.3 in)
Cylinders, Double Acting: Tilt, Bore and Stroke
267 mm × 685 mm (10.5 in × 27.0 in)
Lift/Tilt System
Variable displacement piston
Maximum Flow
13.7gal/min
Maximum Flow at 1,400-1,860 rpm
153.0gal/min
Pilot System
Variable displacement piston
Relief Valve Setting
551.0psi
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt
4757.0psi

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

Dump
2.2Seconds
Lower Float Down
3.5Seconds
Rackback
4.5Seconds
Raise
8.0Seconds
Total Hydraulic Cycle Time (empty bucket)
18.2Seconds

Sound Performance - Suppression

Machine Sound Level (ISO 6395)
109.0dB(A)
Operator Sound Level (ISO 6396)
70.0dB(A)

Brakes

Brakes
SAE J1473 OCT90, ISO 3450:1992

Worktool Attachments

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
    • Transmission lockout
  • 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, 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, Next Generation Modular (NGMR)
    • 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
  • 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

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
    • Payload Control System (PCS)
  • Operator Environment
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
  • Miscellaneous Attachments
    • Front and rear roading fenders

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