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988K Wheel Loader
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Learn more about the 988K Wheel Loader
Product Specs
- Engine
- Operating Specifications
- Transmission
- Hydraulic System - Lift/Tilt
- Service Refill Capacities
- Buckets
- Axles
- Brakes
- Hydraulic System - Steering
- Hydraulic Cycle Time (1,400-1,860 rpm)
- Sound Performance - Tier 4 Final/Stage IV - Standard
- Sound Performance - Tier 4 Final/Stage IV: Suppression
- Sound Performance - Tier 2 Equivalent/Stage II: Suppression
- Sound Performance - Tier 2 Equivalent/Stage II: Standard
Engine
| Net Power | 541 HP |
| Engine Model | Cat® C18 ™ |
| Bore | 5.7 in |
| Stroke | 7.2 in |
| Displacement | 1105 in³ |
| Torque Rise | 58 % |
| Rated Speed | 1700/min |
| Peak Torque - 1,200 rpm | 2104 lb/ft |
| Net Power - SAE J1349 | 541 HP |
| Peak Power Speed | 1500/min |
| Peak Power Speed - 1,500 rpm - Gross - ISO 14396 | 580 HP |
| Gross - ISO 14396 | 580 HP |
| Peak Power Speed - 1,500 rpm - Gross - SAE J1995 | 588 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 HP |
Operating Specifications
| Operating Weight | 112574 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 |
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 - 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 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 |
Hydraulic System - Lift/Tilt
| Maximum Flow | 13.7 gal/min |
| Maximum Flow at 1,400-1,860 rpm | 153 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 |
Service Refill Capacities
| Fuel Tank | 188 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) |
Buckets
| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
Axles
| Front | Fixed |
| Rear | Trunnion |
| Oscillation Angle | 13 ° |
Brakes
| Brakes | SAE J1473 OKT90, ISO 3450:1992 |
Hydraulic System - Steering
| Steering System - Pump | Piston, variable displacement |
| Total Steering Angle | 86 ° |
| Maximum Flow | 71.3 gal/min |
| Relief Valve Setting - Steering | 4351 psi |
| Steering Cycle Times - High Idle | 3.4 s |
| Steering System - Circuit | Pilot, load sensing |
| Steering Cycle Times - Low Idle | 5.6 s |
Hydraulic Cycle Time (1,400-1,860 rpm)
| Total Hydraulic Cycle Time - Empty Bucket | 18.2 s |
| Lower Float Down | 3.5 s |
| Rack Back | 4.5 s |
| Raise | 8 s |
| Dump | 2.2 s |
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
| Machine Sound Level (ISO 6395) | 109 dB(A) |
| Operator Sound Level (ISO 6396) | 72 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 2 Equivalent/Stage II: Standard
| Machine Sound Level (ISO 6395) | 112 dB(A) |
| Operator Sound Level ( ISO 6396) | 73 dB(A) |