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 over 50 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988K XE brings improved sustainability and maximum efficiency to this machine platform.
| Net Power - SAE J1349 | 538HP |
| Engine Model | Cat® C18 ™ |
| Engine Power - ISO 14396 | 580HP |
| Gross Power - SAE J1995 | 588HP |
| Rated Speed | 1,700 rpm |
| Peak Power Speed | 1,500 rpm |
| Emissions | U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 |
| Bore | 5.7in |
| Stroke | 7.2in |
| Displacement | 1105in³ |
| Peak Torque - 1,200 rpm - SAE J1995 | 2230ft·lbf |
| Torque Rise | 58% |
| Operating Weight | 116362lb |
| Operating Weight - Standard | 116362lb |
| Operating Weight - High Lift | 119618lb |
| Rated Payload - Standard (Quarry Face) | 12.5ton (US) |
| Rated Payload - Loose Material (Standard) | 16ton (US) |
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
| Transmission Type | Cat switched reluctance electric drive |
| Forward 1 (virtual) | 4.3mile/h |
| Forward 2 (virtual) | 7mile/h |
| Forward 3 (virtual) | 13.8mile/h |
| Forward 4 (virtual) | 20mile/h |
| Reverse 1 (virtual) | 4.3mile/h |
| Reverse 2 (virtual) | 7mile/h |
| Reverse 3 (virtual) | 17.5mile/h |
| Lift/Tilt System - Circuit | EH-Positive Flow Control, Flow Sharing |
| Lift/Tilt System - Pump | Variable displacement piston |
| Maximum Flow at 1,400-1,600 rpm | 153gal/min |
| Relief Valve Setting - Lift/Tilt | 4757psi |
| Lift Cylinder - Bore | 8.7in |
| Lift Cylinder - Stroke | 41.3in |
| Tilt Cylinder - Bore | 8.7in |
| Tilt Cylinder - Stroke | 27in |
| Rack Back | 4.5s |
| Raise | 8s |
| Dump | 2.2s |
| Lower Float Down | 3.5s |
| Total Hydraulic Cycle Time | 18.2s |
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Maximum Flow at 1,400-1,600 rpm | 71.3gal/min |
| Steering Cut Off Pressure | 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 | 147gal (US) |
| Cooling System - Jacket Water | 30gal (US) |
| Cooling Systems - Power Train | 8gal (US) |
| Engine Crankcase | 16gal (US) |
| Diesel Exhaust Fluid Tank | 8.7gal (US) |
| Transmission | 16gal (US) |
| Differential - Final Drives - Front | 49gal (US) |
| Differential - Final Drives - Rear | 49gal (US) |
| Hydraulic System - Implement/Steering | 126gal (US) |
| Note | All nonroad Tier 4 Final/Stage V diesel engines are required to use: – The machine has the flexibility to run on either ultra-low-sulfur diesel fuel (ULSD with 15 ppm of sulfur or less). – Cat engines are compatible with the following renewable, alternati |
| Operator Sound Level (ISO 6396) | 72dB(A) |
| Machine Sound Level (ISO 6395) | 109dB(A) |
| Note (1) | The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (2) | Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. |
| Note (3) | The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Ground to Bumper Clearance | 3.1ft |
| 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 |
| Ground to Center of Axles | 3.2ft |
| Clearance at Maximum Lift | 11.9ft |
| B-Pin Height - Maximum Lift | 18ft |
| Maximum Overall Height - Bucket Raised | 24.5ft |
| Reach - Maximum Lift | 6.5ft |
| Note | Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Ground to Bumper Clearance | 3.1ft |
| 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 |
| Ground to Center of Axles | 3.2ft |
| 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 |
| Note | Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. |
| Recyclability | 96% |
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988K XE Wheel Loader