Specification sheet Wheel Loader Ref caterpillar-988k-wheel-loader
Caterpillar 988K
The Caterpillar 988K is a wheel loader with an operating weight of 112,574 lb (51,062.72 kg), and a 541 hp engine.
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
112,574lb
51,062.72kg
Engine power
541hp
403.5kW
Net Power ◆Where it sits in its classpercentile · large wheel loaders
Among 39 large wheel loaders (90,000–150,000 lb), the Caterpillar 988K sits above the median for its class:
- Operating weight 112,570 lb heavier than 64% (n=39)
- Engine power 541 hp more powerful than 84% (n=37)
01 Engine Specification
| Net Power | 541hp | 403.5kw |
|---|---|---|
| Rated Speed | 1700rpm | |
| Displacement | 1105cu in | 18.2L |
| Torque Rise | 58% | |
| Bore | 5.7in | 144.8mm |
| Stroke | 7.2in | 182.9mm |
| 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 | 403.5kw |
| Engine Model | Cat C18 ACERT | |
| Peak Torque - 1,200 Rpm | 2104lb ft | 2852.7Nm |
| Gross - Iso 14396 | 580hp | 432.6kw |
| Peak Power Speed | 1,500 rpm | |
| Peak Power Speed - 1,500 Rpm - Gross - Iso 14396 | 580hp | 432.6kw |
| Peak Power Speed - 1,500 Rpm - Gross - Sae J1995 | 588hp | 438.5kw |
| Peak Power Speed - 1,500 Rpm - Net Power - Sae J1349 | 541hp | 403.5kw |
02 Operational Specification
| Operating Weight | 112574lb | 51062.8kg |
|---|
03 Transmission Specification
| Transmission Type | Cat planetary power shift | |
|---|---|---|
| Forward - 1 | 4mph | 6.5km/h |
| Forward - 2 | 7.2mph | 11.6km/h |
| Forward - 3 | 12.7mph | 20.5km/h |
| Forward - 4 | 21.6mph | 34.8km/h |
| Reverse - 1 | 4.7mph | 7.6km/h |
| Reverse - 2 | 8.3mph | 13.4km/h |
| Direct Drive - Forward 3 | 13.9mph | 22.4km/h |
| Direct Drive - Reverse 3 | 15.8mph | 25.5km/h |
| Direct Drive - Forward 4 | 24.4mph | 39.3km/h |
| Direct Drive - Forward 2 | 7.8mph | 12.6km/h |
| Direct Drive - Reverse 2 | 8.9mph | 14.4km/h |
| Direct Drive - Forward 1 | Lock-up disabled | |
| Direct Drive - Reverse 1 | 5mph | 8.1km/h |
| Reverse - 3 | 14.4mph | 23.2km/h |
04 Buckets Specification
| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
|---|
05 Axles Specification
| Front | Fixed | |
|---|---|---|
| Rear | Trunnion | |
| Oscillation Angle | 13 degrees |
06 Brakes Specification
| Brakes | SAE J1473 OCT90, ISO 3450:1992 |
|---|
07 Operating Specifications Specification
| 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 | 12500kg |
| Rated Payload - Loose Material | 35274lb | 16000kg |
08 Service Refill Capacities Specification
| Cooling System | 31.7gal | 120L |
|---|---|---|
| Fuel Tank | 188gal | 711.7L |
| Crankcase | 15.9gal | 60.2L |
| Transmission | 31.7gal | 120L |
| Differential - Final Drives - Front | 49.1gal | 185.9L |
| Differential - Final Drives - Rear | 49.1gal | 185.9L |
| Hydraulic System Factory Fill | 125.5gal | 475.1L |
| Hydraulic System - Tank Only | 63.4gal | 240L |
| Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage Iv Only) | 8.7gal | 33L |
| Coolant (Validated By Test Cell Fill Quantities) | 33gal | 125L |
| Transmission - Validated By Test Cell Fill Quantities | 29gal | 109.8L |
09 Hydraulic System - Lift/Tilt Specification
| 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 |
10 Hydraulic System - Steering Specification
| 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 |
11 Hydraulic Cycle Time (1,400-1,860 Rpm) Specification
| 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 |
12 Sound Performance - Tier 2 Equivalent/Stage Ii: Standard Specification
| Machine Sound Level (Iso 6395) | 112 dB(A) | |
|---|---|---|
| Operator Sound Level ( Iso 6396) | 73 dB(A) |
13 Sound Performance - Tier 2 Equivalent/Stage Ii: Suppression Specification
| Operator Sound Level (Iso 6396) | 72 dB(A) | |
|---|---|---|
| Machine Sound Level (Iso 6395) | 110 dB(A) |
14 Sound Performance - Tier 4 Final/Stage Iv - Standard Specification
| Operator Sound Level (Iso 6396) | 72 dB(A) | |
|---|---|---|
| Machine Sound Level (Iso 6395) | 111 dB(A) |
15 Sound Performance - Tier 4 Final/Stage Iv: Suppression Specification
| Operator Sound Level (Iso 6396) | 72 dB(A) | |
|---|---|---|
| Machine Sound Level (Iso 6395) | 109 dB(A) |
Method. Figures are manufacturer reference specifications, not measurements. Every value is checked for unit consistency, physically possible magnitude, and plausibility for its equipment class before publication; figures that fail any check are withheld rather than shown, and figures reconstructed from related data are marked above. Imperial and metric figures are reproduced as published, except where a note states otherwise.