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 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.
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 Power Speed - 1,500 rpm - Gross - ISO 14396 | 580 HP |
Peak Power Speed | 1500/min |
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 | 588 HP |
Net Power - SAE J1349 | 541 HP |
Peak Torque - 1,200 rpm | 2104 lb/ft |
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 |
Gross - ISO 14396 | 580 HP |
Operating Weight | 112574 lb |
Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
Rated Payload - Loose Material | 16 t |
Rated Payload - Quarry Face | 12.5 t |
Cat Truck Match - High Lift | 773~775 |
Cat Truck Match - Standard | 770~772 |
Transmission Type | Cat planetary powershift |
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 - Forward 2 | 7.8 mile/h |
Direct Drive - Reverse 2 | 8.9 mile/h |
Direct Drive - Forward 4 | 24.4 mile/h |
Direct Drive - Reverse 3 | 15.8 mile/h |
Direct Drive - Reverse 1 | 5 mile/h |
Direct Drive - Forward 3 | 13.9 mile/h |
Direct Drive - Forward 1 | Lock-up disabled |
Relief Valve Setting - Main | 551 psi |
Cylinders, Double Acting - Tilt, Bore and Stroke | 269 mm × 685 mm (8.7 in × 27 in) |
Pilot System | Variable displacement piston |
Maximum Flow at 1,400-1,860 rpm | 153 gal/min |
Relief Valve Setting - Lift/Tilt | 4757 psi |
Maximum Flow | 13.7 gal/min |
Cylinders, Double Acting - Lift, Bore and Stroke | 210 mm × 1050 mm (8.7 in × 41.3 in) |
Lift/Tilt System | Variable displacement piston |
Lift/Tilt System - Circuit | EH- Positive Flow Control, Flow Sharing |
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) |
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only) | 8.7 gal (US) |
Differential - Final Drives - Front | 49.1 gal (US) |
Hydraulic System Factory Fill | 125.5 gal (US) |
Coolant (Validated by Test Cell Fill Quantities) | 33 gal (US) |
Transmission - Validated by Test Cell Fill Quantities | 29 gal (US) |
Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
Front | Fixed |
Rear | Trunnion |
Oscillation Angle | 13 ° |
Brakes | SAE J1473 OKT90, ISO 3450:1992 |
Maximum Flow | 71.3 gal/min |
Total Steering Angle | 86 ° |
Relief Valve Setting - Steering | 4351 psi |
Steering System - Circuit | Pilot, load sensing |
Steering System - Pump | Piston, variable displacement |
Steering Cycle Times - Low Idle | 5.6 s |
Steering Cycle Times - High Idle | 3.4 s |
Dump | 2.2 s |
Total Hydraulic Cycle Time - Empty Bucket | 18.2 s |
Rack Back | 4.5 s |
Lower Float Down | 3.5 s |
Raise | 8 s |
Machine Sound Level (ISO 6395) | 111 dB(A) |
Operator Sound Level (ISO 6396) | 72 dB(A) |
Operator Sound Level (ISO 6396) | 72 dB(A) |
Machine Sound Level (ISO 6395) | 109 dB(A) |
Machine Sound Level (ISO 6395) | 112 dB(A) |
Operator Sound Level (ISO 6396) | 73 dB(A) |
Machine Sound Level (ISO 6395) | 110 dB(A) |
Operator Sound Level (ISO 6396) | 72 dB(A) |