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 low cost per ton. Introduced in 1963, the 988 has been an 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 - SAE J1349:2011 | 541HP |
| Engine Power - ISO 14396:2002 | 580HP |
| Gross Power - SAE J1995:2014 | 588HP |
| Engine Model | Cat® C18 ™ |
| Rated Speed | 1700/min |
| Peak Power Speed | 1500/rpm |
| Emissions | U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards, Brazil MAR-1 and China Nonroad Stage IV emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA, and U.S. EPA Tier 2 and EU Stage II |
| Bore | 5.7in |
| Stroke | 7.2in |
| Displacement | 1105in³ |
| Peak Torque - 1,200 rpm | 2230lb/ft |
| Torque Rise | 58% |
| Operating Weight | 112574lb |
| Rated Payload - Quarry Face | 12.5t |
| Rated Payload - Loose Material | 16t |
| 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/h |
| Forward - 2 | 7.2mile/h |
| Forward - 3 | 12.7mile/h |
| Forward - 4 | 21.6mile/h |
| Reverse - 1 | 4.7mile/h |
| Reverse - 2 | 8.3mile/h |
| Reverse - 3 | 14.4mile/h |
| Direct Drive - Forward 1 | Lock-up disabled |
| Direct Drive - Forward 2 | 7.8mile/h |
| Direct Drive - Forward 3 | 13.9mile/h |
| Direct Drive - Forward 4 | 24.4mile/h |
| Direct Drive - Reverse 1 | 5mile/h |
| Direct Drive - Reverse 2 | 8.9mile/h |
| Direct Drive - Reverse 3 | 15.8mile/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/min |
| Relief Valve Setting - Lift/Tilt | 4757psi |
| 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 | 551psi |
| Rack Back | 4.5s |
| Raise | 8s |
| Dump | 2.2s |
| Lower Float Down | 3.5s |
| Total Hydraulic Cycle Time - Empty Bucket | 18.2s |
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Maximum Flow | 71.3gal/min |
| Relief Valve Setting - Steering | 4351psi |
| Total Steering Angle | 86 ° |
| Steering Cycle Times - High Idle | 3.4s |
| Steering Cycle Times - Low Idle | 5.6s |
| 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) |
| Cooling System | 31.7gal (US) |
| Coolant (Validated by Test Cell Fill Quantities) | 33gal (US) |
| Crankcase | 15.9gal (US) |
| Diesel Exhaust Fluid Tank | 8.7gal (US) |
| Transmission | 31.7gal (US) |
| Transmission - Validated by Test Cell Fill Quantities | 29gal (US) |
| Differential - Final Drives - Front | 49.1gal (US) |
| Differential - Final Drives - Rear | 49.1gal (US) |
| Hydraulic System Factory Fill | 125.5gal (US) |
| Hydraulic System - Tank Only | 63.4gal (US) |
| Operator Sound Pressure Level (ISO 6396:2008) | 73dB(A) |
| Machine Sound Power Level (ISO 6395:2008) | 111dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008) | 73dB(A) |
| Machine Sound Power Level (ISO 6395:2008) | 112dB(A) |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Rear Axle - Centerline to Bumper | 10.5ft |
| Front Axle Centerline to Bucket Tip | 14ft |
| Wheel Base | 14.9ft |
| Maximum Overall Length | 39.3ft |
| Ground to Lower Hitch Clearance | 1.9ft |
| Clearance at Maximum Lift | 11.9ft |
| B-Pin Height - Maximum Lift | 18ft |
| Maximum Overall Height - Bucket Raised | 24.5ft |
| Reach - Maximum Lift | 6.5ft |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Rear Axle - Centerline to Bumper | 10.5ft |
| Front Axle Centerline to Bucket Tip | 15.3ft |
| Wheel Base | 14.9ft |
| Maximum Overall Length | 40.7ft |
| Ground to Lower Hitch Clearance | 1.9ft |
| Clearance at Maximum Lift | 13.3ft |
| B-Pin Height - Maximum Lift | 19.3ft |
| Maximum Overall Height - Bucket Raised | 25.8ft |
| Reach - Maximum Lift | 6.8ft |
| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
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988 Wheel Loader