Caterpillar 988K Wheel Loader
Specifications
Engine
Net Power
541hp
Rated Speed
1700rpm
Displacement
1105cu in
Torque Rise
58%
Bore
5.7in
Stroke
7.2in
Emissions
U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Net Power - Sae J1349
541hp
Engine Model
Cat C18 ACERT
Peak Torque - 1,200 Rpm
2104lb ft
Gross - Iso 14396
580hp
Peak Power Speed
1,500 rpm
Peak Power Speed - 1,500 Rpm - Gross - Iso 14396
580hp
Peak Power Speed - 1,500 Rpm - Gross - Sae J1995
588hp
Peak Power Speed - 1,500 Rpm - Net Power - Sae J1349
541hp
Operational
Operating Weight
112574lb
Transmission
Transmission Type
Cat planetary power shift
Forward - 1
4mph
Forward - 2
7.2mph
Forward - 3
12.7mph
Forward - 4
21.6mph
Reverse - 1
4.7mph
Reverse - 2
8.3mph
Direct Drive - Forward 3
13.9mph
Direct Drive - Reverse 3
15.8mph
Direct Drive - Forward 4
24.4mph
Direct Drive - Forward 2
7.8mph
Direct Drive - Reverse 2
8.9mph
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Reverse 1
5mph
Reverse - 3
14.4mph
Buckets
Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
13 degrees
Brakes
Brakes
SAE J1473 OCT90, ISO 3450:1992
Operating Specifications
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - Standard
770-772
Cat Truck Match - High Lift
773-775
Rated Payload - Quarry Face
27557.8lb
Rated Payload - Loose Material
35274lb
Service Refill Capacities
Cooling System
31.7gal
Fuel Tank
188gal
Crankcase
15.9gal
Transmission
31.7gal
Differential - Final Drives - Front
49.1gal
Differential - Final Drives - Rear
49.1gal
Hydraulic System Factory Fill
125.5gal
Hydraulic System - Tank Only
63.4gal
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage Iv Only)
8.7gal
Coolant (Validated By Test Cell Fill Quantities)
33gal
Transmission - Validated By Test Cell Fill Quantities
29gal
Hydraulic System - Lift/Tilt
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt
4757 psi
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)
Pilot System
Variable displacement piston
Lift/Tilt System
Variable displacement piston
Relief Valve Setting
551 psi
Maximum Flow
13.7 gal/min
Maximum Flow At 1,400-1,860 Rpm
153 gal/min
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Relief Valve Setting - Steering
4351 psi
Steering Cycle Times - Low Idle
5.6 s
Steering Cycle Times - High Idle
3.4 s
Maximum Flow
71.3 gal/min
Hydraulic Cycle Time (1,400-1,860 Rpm)
Rack Back
4.5 s
Raise
8 s
Dump
2.2 s
Lower Float Down
3.5 s
Total Hydraulic Cycle Time - Empty Bucket
18.2 s
Sound Performance - Tier 2 Equivalent/Stage Ii: Standard
Machine Sound Level (Iso 6395)
112 dB(A)
Operator Sound Level ( Iso 6396)
73 dB(A)
Sound Performance - Tier 2 Equivalent/Stage Ii: Suppression
Operator Sound Level (Iso 6396)
72 dB(A)
Machine Sound Level (Iso 6395)
110 dB(A)
Sound Performance - Tier 4 Final/Stage Iv - Standard
Operator Sound Level (Iso 6396)
72 dB(A)
Machine Sound Level (Iso 6395)
111 dB(A)
Sound Performance - Tier 4 Final/Stage Iv: Suppression
Operator Sound Level (Iso 6396)
72 dB(A)
Machine Sound Level (Iso 6395)
109 dB(A)
