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988K Wheel Loader Steel Mill Arrangement

Net Power

541 HP

Operating Weight

112,574 lb

Bucket Capacities

5.4-6.3 m3 (7.0-8.3 yd3)

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SPECIFICATIONS

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.

FULL SPECIFICATIONS

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

±6°

Brakes

SAE J1473 OKT90, ISO 3450:1992

Buckets

Bucket Capacities

5.4-6.3 m3 (7.0-8.3 yd3)

Engine

Net Power

541 HP

Engine Model

Cat® C18 ™

Net Power - SAE J1349

541 HP

Bore

5.7 in

Stroke

7.2 in

Displacement

1,105 in³

Torque Rise

58 %

Rated Speed

1700/min

Peak Torque - 1,200 rpm

2,104 lb/ft

Peak Power Speed - 1,500 rpm - Gross - ISO 14396

580 HP

Emissions

Einhaltung von EPA Tier 4 Final (USA)/Stufe V (EU), Tier-2-konform

Peak Power Speed - 1,500 rpm - Net Power - SAE J1349

541 HP

Gross - ISO 14396

580 HP

Peak Power Speed

1500/min

Peak Power Speed - 1,500 rpm - Gross - SAE J1995

588 HP

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

Dump

2.2 s

Raise

8 s

Total Hydraulic Cycle Time - Empty Bucket

18.2 s

Rack Back

4.5 s

Lower Float Down

3.5 s

Hydraulic System - Lift/Tilt

Cylinders, Double Acting - Lift, Bore and Stroke

210 mm × 1050 mm (8.3 in × 41.3 in)

Lift/Tilt System

Variable displacement piston

Maximum Flow

13.7 gal/min

Pilot System

Variable displacement piston

Cylinders, Double Acting - Tilt, Bore and Stroke

267 mm × 685 mm (10.5 in × 27.0 in)

Maximum Flow at 1,400-1,860 rpm

153 gal/min

Relief Valve Setting - Main

551 psi

Lift/Tilt System - Circuit

EH- Positive Flow Control, Flow Sharing

Relief Valve Setting - Lift/Tilt

4,757 psi

Hydraulic System - Steering

Steering System - Circuit

Pilot, load sensing

Steering System - Pump

Piston, variable displacement

Relief Valve Setting - Steering

4,351 psi

Total Steering Angle

80 °

Steering Cycle Times - High Idle

3.4 s

Steering Cycle Times - Low Idle

5.6 s

Maximum Flow

71.3 gal/min

Operating Specifications

Operating Weight

112,574 lb

Rated Payload

12.5 t

Rated Payload - Standard

12.5 t

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

12.5 t

Service Refill Capacities

Fuel Tank

181 gal (US)

Cooling System

31.7 gal (US)

Crankcase

15.9 gal (US)

Transmission

31.7 gal (US)

Differential - Final Drives - Front

49.1 gal (US)

Differential - Final Drives - Rear

49.1 gal (US)

Hydraulic System - Tank Only

63.4 gal (US)

Diesel Exhaust Fluid Tank (Tier 4)

8.7 gal (US)

Hydraulic System Factory Fill

125.5 gal (US)

Sound Performance - Standard

Machine Sound Level (ISO 6395)

111 dB(A)

Operator Sound Level (ISO 6396)

71 dB(A)

Sound Performance - Suppression

Machine Sound Level (ISO 6395)

109 dB(A)

Operator Sound Level (ISO 6396)

70 dB(A)

Transmission

Transmission Type

Cat-Planetenlastschaltgetriebe

Forward - 1

4 mile/h

Forward - 2

7.2 mile/h

Forward - 3

12.7 mile/h

Forward - 4

21.6 mile/h

Reverse - 1

4.7 mile/h

Reverse - 2

8.3 mile/h

Reverse - 3

14.4 mile/h

Direct Drive - Forward 1

Lock-up disabled

Direct Drive - Forward 2

7.8 mile/h

Direct Drive - Forward 3

13.9 mile/h

Direct Drive - Forward 4

24.4 mile/h

Direct Drive - Reverse 1

5 mile/h

Direct Drive - Reverse 2

8.9 mile/h

Direct Drive - Reverse 3

15.8 mile/h

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
- 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

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
- 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