988K
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.
Net Power
541.0 HP
Engine Model
Cat® C18 ™
Bore
5.7 in
Specification
Value
Net Power
541.0 HP
Engine Model
Cat® C18 ™
Bore
5.7 in
Stroke
7.2 in
Displacement
1105.0 in³
Torque Rise
58.0 %
Rated Speed
1700/min
Peak Torque - 1,200 rpm
2104.0 lb/ft
Net Power - SAE J1349
541.0 HP
Peak Power Speed
1500/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396
580.0 HP
Gross - ISO 14396
580.0 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995
588.0 HP
Emissions
U.S. EPA Tier 4 Final/EU Stage V OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
541.0 HP
Specification
Value
Operating Weight
112574.0 lb
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Rated Payload - Quarry Face
12.5 t
Cat Truck Match - High Lift
773～775
Rated Payload - Loose Material
16 t
Cat Truck Match - Standard
770～772
Specification
Value
Transmission Type
Cat-Planetenlastschaltgetriebe
Forward - 1
4.0 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 - Reverse 2
8.9 mile/h
Direct Drive - Reverse 3
15.8 mile/h
Direct Drive - Forward 2
7.8 mile/h
Direct Drive - Reverse 1
5.0 mile/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 3
13.9 mile/h
Direct Drive - Forward 4
24.4 mile/h
Specification
Value
Maximum Flow
13.7 gal/min
Maximum Flow at 1,400-1,860 rpm
153.0 gal/min
Lift/Tilt System
Variable displacement piston
Cylinders, Double Acting - Tilt, Bore and Stroke
269 mm × 685 mm (8.7 in × 27 in)
Relief Valve Setting - Main
551 psi
Relief Valve Setting - Lift/Tilt
4757 psi
Pilot System
Variable displacement piston
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Specification
Value
Fuel Tank
188.0 gal (US)
Cooling System
31.7 gal (US)
Crankcase
15.9 gal (US)
Transmission
31.7 gal (US)
Hydraulic System - Tank Only
63.4 gal (US)
Differential - Final Drives - Rear
49.1 gal (US)
Hydraulic System Factory Fill
125.5 gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)
8.7 gal (US)
Differential - Final Drives - Front
49.1 gal (US)
Coolant (Validated by Test Cell Fill Quantities)
33 gal (US)
Transmission - Validated by Test Cell Fill Quantities
29 gal (US)
Specification
Value
Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Specification
Value
Front
Fixed
Rear
Trunnion
Oscillation Angle
13 °
Specification
Value
Brakes
SAE J1473 OKT90, ISO 3450:1992
Specification
Value
Steering System - Pump
Piston, variable displacement
Total Steering Angle
86 °
Maximum Flow
71.3 gal/min
Relief Valve Setting - Steering
4351.0 psi
Steering Cycle Times - High Idle
3.4 s
Steering System - Circuit
Pilot, load sensing
Steering Cycle Times - Low Idle
5.6 s
Specification
Value
Total Hydraulic Cycle Time - Empty Bucket
18.2 s
Lower Float Down
3.5 s
Rack Back
4.5 s
Raise
8.0 s
Dump
2.2 s
Specification
Value
Operator Sound Level (ISO 6396)
72 dB(A)
Machine Sound Level (ISO 6395)
111 dB(A)
Specification
Value
Machine Sound Level (ISO 6395)
109 dB(A)
Operator Sound Level (ISO 6396)
72 dB(A)
Specification
Value
Operator Sound Level (ISO 6396)
72 dB(A)
Machine Sound Level (ISO 6395)
110 dB(A)
Specification
Value
Machine Sound Level (ISO 6395)
112 dB(A)
Operator Sound Level ( ISO 6396)
73 dB(A)
