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.
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Net Power | 541HP403kW |
Engine Model | Cat® C18 ™ |
Bore | 5.7in145mm |
Stroke | 7.2in183mm |
Displacement | 1105in³18.1l |
Torque Rise | 58%58% |
Rated Speed | 1700/min |
Gross - ISO 14396 | 580HP432kW |
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 | 541HP403kW |
Emissions | U.S. EPA Tier 4 Final/EU Stage V OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent |
Peak Torque - 1,200 rpm | 2104lb/ft2852N·m |
Net Power - SAE J1349 | 541HP403kW |
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 | 588HP439kW |
Peak Power Speed | 1500/min |
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 | 580HP432kW |
Operating Weight | 112574lb51062kg |
Rated Payload - Quarry Face | 12.5t11.3t |
Rated Payload - Loose Material | 16t14.5t |
Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
Cat Truck Match - Standard | 770~772 |
Cat Truck Match - High Lift | 773~775 |
Transmission Type | Cat planetary powershift |
Forward - 1 | 4mile/h6.5km/h |
Forward - 2 | 7.2mile/h11.6km/h |
Forward - 3 | 12.7mile/h20.4km/h |
Forward - 4 | 21.6mile/h34.7km/h |
Reverse - 1 | 4.7mile/h7.5km/h |
Reverse - 2 | 8.3mile/h13.3km/h |
Reverse - 3 | 14.4mile/h23.2km/h |
Direct Drive - Forward 1 | Lock-up disabled |
Direct Drive - Forward 2 | 7.8mile/h12.5km/h |
Direct Drive - Forward 3 | 13.9mile/h22.3km/h |
Direct Drive - Forward 4 | 24.4mile/h39.3km/h |
Direct Drive - Reverse 1 | 5mile/h8km/h |
Direct Drive - Reverse 2 | 8.9mile/h14.3km/h |
Direct Drive - Reverse 3 | 15.8mile/h25.5km/h |
Lift/Tilt System - Circuit | EH- Positive Flow Control, Flow Sharing |
Lift/Tilt System | Variable displacement piston |
Maximum Flow at 1,400-1,860 rpm | 153gal/min580l/min |
Relief Valve Setting - Lift/Tilt | 4757psi32800kPa |
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 |
Relief Valve Setting - Main | 551psi3800kPa |
Rack Back | 4.5s4.5s |
Raise | 8s8s |
Dump | 2.2s2.2s |
Lower Float Down | 3.5s3.5s |
Total Hydraulic Cycle Time - Empty Bucket | 18.2s18.2s |
Steering System - Circuit | Pilot, load sensing |
Steering System - Pump | Piston, variable displacement |
Maximum Flow | 71.3gal/min270l/min |
Relief Valve Setting - Steering | 4351psi30000kPa |
Total Steering Angle | 86 ° |
Steering Cycle Times - High Idle | 3.4s3.4s |
Steering Cycle Times - Low Idle | 5.6s5.6s |
Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes. |
Front | Fixed |
Rear | Trunnion |
Oscillation Angle | 13 ° |
Brakes | ISO 3450:2011 |
ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards |
Fuel Tank | 188gal (US)712l |
Cooling System | 31.7gal (US)120l |
Coolant (Validated by Test Cell Fill Quantities) | 33gal (US)125l |
Crankcase | 15.9gal (US)60l |
Diesel Exhaust Fluid Tank | 8.7gal (US)33l |
Transmission | 31.7gal (US)120l |
Transmission - Validated by Test Cell Fill Quantities | 29gal (US)110l |
Differential - Final Drives - Front | 49.1gal (US)186l |
Differential - Final Drives - Rear | 49.1gal (US)186l |
Hydraulic System Factory Fill | 125.5gal (US)475l |
Hydraulic System - Tank Only | 63.4gal (US)240l |
Ground to Top of ROPS | 13.8ft4202mm |
Ground to Top of Hood | 10.9ft3334mm |
Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
Operator Sound Level (ISO 6396) | 72dB(A)72dB(A) |
Machine Sound Level (ISO 6395) | 111dB(A)111dB(A) |
Machine Sound Level (ISO 6395) | 109dB(A)109dB(A) |
Operator Sound Level (ISO 6396) | 72dB(A)72dB(A) |
Operator Sound Level (ISO 6396) | 72dB(A)72dB(A) |
Machine Sound Level (ISO 6395) | 110dB(A)110dB(A) |
Operator Sound Level (ISO 6396) | 73dB(A)73dB(A) |
Machine Sound Level (ISO 6395) | 112dB(A)112dB(A) |