988K Wheel Loader

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Product Description

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.

Specifications
Us
Metric
Engine
Net Power
541.0 hp
403.0 kW
Engine Model
Cat® C18 ACERT™
Net Power – SAE J1349
541.0 hp
403.0 kW
Bore
5.7 in
145.0 mm
Stroke
7.2 in
183.0 mm
Displacement
1105.0 in3
18.1 L
Torque Rise
58.0 %
58.0 %
Rated Speed
1,700 rpm
Emissions
U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross (ISO 14396)
580.0 hp
432.0 kW
Peak Power Speed
1,500 rpm
Peak Power Speed @ 1,500 rpm: Gross – ISO 14396
580.0 hp
432.0 kW
Peak Power Speed @ 1,500 rpm: Gross – SAE J1995
588.0 hp
439.0 kW
Peak Power Speed @ 1,500 rpm: Net Power – SAE J1349
541.0 hp
403.0 kW
Peak Torque @ 1,200 rpm
2104.0 lb ft
2852.0 N·m
Operating Specifications
Operating Weight
112574.0 lb
51062.0 kg
Rated Payload – Quarry Face
12.5 tons
11.3 tonnes
Rated Payload – Loose Material
16 tons
14.5 tonnes
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Cat Truck Match – Standard
770-772
Cat Truck Match – High Lift
773-775
Buckets
Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Transmission
Transmission Type
Cat planetary power shift
Forward 1
4.0 mph
6.5 km/h
Forward 2
7.2 mph
11.6 km/h
Forward 3
12.7 mph
20.4 km/h
Forward 4
21.6 mph
34.7 km/h
Reverse 1
4.7 mph
7.5 km/h
Reverse 2
8.3 mph
13.3 km/h
Reverse 3
14.4 mph
23.2 km/h
Direct Drive Forward 1
Lock-up disabled
Direct Drive Forward 2
7.8 mph
12.5 km/h
Direct Drive Forward 3
13.9 mph
22.3 km/h
Direct Drive Forward 4
24.4 mph
39.3 km/h
Direct Drive Reverse 1
5.0 mph
8.0 km/h
Direct Drive Reverse 2
8.9 mph
14.3 km/h
Direct Drive Reverse 3
15.8 mph
25.5 km/h
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
13°
Hydraulic System – Steering
Steering System – Circuit
Pilot, load sensing
Steering System – Pump
Piston, variable displacement
Relief Valve Setting – Steering
4351.0 psi
30000.0 kPa
Maximum Flow
71.3 gal/min
270.0 L/min
Steering Cycle Time (high idle)
3.4 sec
3.4 sec
Steering Cycle Time (low idle)
5.6 sec
5.6 sec
Total Steering Angle
86°
Service Refill Capacities
Fuel Tank
188.0 gal
712.0 L
Cooling System
31.7 gal
120.0 L
Crankcase
15.9 gal
60.0 L
Transmission
31.7 gal
120.0 L
Differentials and Final Drives – Front
49.1 gal
186.0 L
Differentials and Final Drives – Rear
49.1 gal
186.0 L
Hydraulic System (tank only)
63.4 gal
240.0 L
Diesel Exhaust Fluid Tank (for Tier 4 Final/Stage IV only)
8.7 gal
33.0 L
Hydraulic System Factory Fill
125.5 gal
475.0 L
Sound Performance – Tier 4 Final/Stage IV: Standard
Operator Sound Level (ISO 6396)
72 dB(A)
72 dB(A)
Machine Sound Level (ISO 6395)
111 dB(A)
111 dB(A)
Hydraulic System – Lift/Tilt
Cylinders, Double Acting: Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting: Tilt, Bore and Stroke
269 mm × 685 mm (8.7 in × 27 in)
Lift/Tilt System
Variable displacement piston
Maximum Flow
13.7 gal/min
52.0 L/min
Maximum Flow at 1,400-1,860 rpm
153.0 gal/min
580.0 L/min
Pilot System
Variable displacement piston
Relief Valve Setting
551 psi
3800 kPa
Lift/Tilt System – Circuit
EH- Positive Flow Control, Flow Sharing
Relief Valve Setting – Lift/Tilt
4757 psi
32800 kPa
Hydraulic Cycle Time (1,400-1,860 rpm)
Dump
2.2 Seconds
2.2 Seconds
Lower Float Down
3.5 Seconds
3.5 Seconds
Rackback
4.5 Seconds
4.5 Seconds
Raise
8.0 Seconds
8.0 Seconds
Total Hydraulic Cycle Time (empty bucket)
18.2 Seconds
18.2 Seconds
Sound Performance – Tier 4 Final/Stage IV: Suppression
Operator Sound Level (ISO 6396)
72 dB(A)
72 dB(A)
Machine Sound Level (ISO 6395)
109 dB(A)
109 dB(A)
Brakes
Brakes
SAE J1473 OCT90, ISO 3450:1992
Service Refill Capacities
Coolant (validated by test cell fill quantities)
33 gal
125 L
Transmission (validated by test cell fill quantities)
29 gal
110 L
Sound Performance – Tier 2 Equivalent/Stage II: Standard
Operator Sound Level (ISO 6396)
73 dB(A)
73 dB(A)
Machine Sound Level (ISO 6395)
112 dB(A)
112 dB(A)
Sound Performance – Tier 2 Equivalent/Stage II: Suppression
Operator Sound Level (ISO 6396)
72 dB(A)
72 dB(A)
Machine Sound Level (ISO 6395)
110 dB(A)
110 dB(A)
Standard/Optional

Standard Equipment

ELECTRICAL
OPERATOR ENVIRONMENT
POWER TRAIN
OTHER

Optional Equipment

POWER TRAIN
OPERATOR ENVIRONMENT
MISCELLANEOUS ATTACHMENTS

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