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 60 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988 XE brings improved sustainability and maximum efficiency to this machine platform.
Engine Model | Cat® C18 ™ |
Rated Speed | 1,700 rpm |
Peak Power Speed | 1,500 rpm |
Emissions | U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 |
Torque Rise | 58% |
Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
Transmission Type | Cat switched reluctance electric drive |
Lift/Tilt System - Circuit | EH-Positive Flow Control, Flow Sharing |
Lift/Tilt System - Pump | Variable displacement piston |
Steering System - Circuit | Pilot, load sensing |
Steering System - Pump | Piston, variable displacement |
Total Steering Angle | 86° |
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 |
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, alternative, and biodiesel* fuels that reduce greenhouse gases: Up to B20 biodiesel (FAME) ** Up to 100% HVO and GTL renewable fuels * Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Only use DEF that meets ISO 22241-1 standards. |
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. |
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. |
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. |
Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) |
Recyclability | 96% |
Net Power - SAE J1349 | 401 kW |
Engine Power - ISO 14396 | 432 kW |
Gross Power - SAE J1995 | 439 kW |
Bore | 145 mm |
Stroke | 183 mm |
Displacement | 18.1 l |
Peak Torque - 1,200 rpm - SAE J1995 | 3023 N·m |
Operating Weight | 52781 kg |
Operating Weight - Standard | 52781 kg |
Operating Weight - High Lift | 54258 kg |
Rated Payload - Standard (Quarry Face) | 11.3 t |
Rated Payload - Loose Material (Standard) | 14.5 t |
Forward 1 (virtual) | 7 km/h |
Forward 2 (virtual) | 11.3 km/h |
Forward 3 (virtual) | 22.2 km/h |
Forward 4 (virtual) | 32.1 km/h |
Reverse 1 (virtual) | 7 km/h |
Reverse 2 (virtual) | 11.3 km/h |
Reverse 3 (virtual) | 28.2 km/h |
Maximum Flow at 1,400-1,600 rpm | 580 l/min |
Relief Valve Setting - Lift/Tilt | 32800 kPa |
Lift Cylinder - Bore | 210 mm |
Lift Cylinder - Stroke | 1050 mm |
Tilt Cylinder - Bore | 269 mm |
Tilt Cylinder - Stroke | 685 mm |
Rack Back | 4.5 s |
Raise | 8 s |
Dump | 2.2 s |
Lower Float Down | 3.5 s |
Total Hydraulic Cycle Time | 18.2 s |
Maximum Flow at 1,400-1,600 rpm | 270 l/min |
Steering Cut Off Pressure | 30000 kPa |
Steering Cycle Times - High Idle | 3.4 s |
Steering Cycle Times - Low Idle | 5.6 s |
Fuel Tank | 555 l |
Cooling System - Jacket Water | 112 l |
Cooling Systems - Power Train | 30 l |
Engine Crankcase | 60 l |
Diesel Exhaust Fluid Tank | 33 l |
Transmission | 60 l |
Differential - Final Drives - Front | 186 l |
Differential - Final Drives - Rear | 186 l |
Hydraulic System - Implement/Steering | 475 l |
Operator Sound Level (ISO 6396) | 72 dB(A) |
Machine Sound Level (ISO 6395) | 109 dB(A) |
Ground to Top of ROPS | 4202 mm |
Ground to Top of Exhaust Stacks | 4498 mm |
Ground to Top of Hood | 3334 mm |
Ground to Bumper Clearance | 933 mm |
Rear Axle - Centerline to Bumper | 3187 mm |
Front Axle Centerline to Bucket Tip | 14 mm |
Wheel Base | 4550 mm |
Maximum Overall Length | 11991 mm |
Ground to Lower Hitch Clearance | 568 mm |
Ground to Center of Axles | 978 mm |
Clearance at Maximum Lift | 3641 mm |
B-Pin Height - Maximum Lift | 5479 mm |
Maximum Overall Height - Bucket Raised | 7455 mm |
Reach - Maximum Lift | 1981 mm |
Ground to Top of ROPS | 4202 mm |
Ground to Top of Exhaust Stacks | 4498 mm |
Ground to Top of Hood | 3334 mm |
Ground to Bumper Clearance | 933 mm |
Rear Axle - Centerline to Bumper | 3187 mm |
Front Axle Centerline to Bucket Tip | 4661 mm |
Wheel Base | 4550 mm |
Maximum Overall Length | 12398 mm |
Ground to Lower Hitch Clearance | 568 mm |
Ground to Center of Axles | 978 mm |
Clearance at Maximum Lift | 4043 mm |
B-Pin Height - Maximum Lift | 5881 mm |
Maximum Overall Height - Bucket Raised | 7849 mm |
Reach - Maximum Lift | 2062 mm |
Ground to Top of ROPS | 4221 mm |
Ground to Top of Exhaust Stacks | 4214 mm |
Ground to Top of Hood | 3334 mm |
Ground to Bumper Clearance | 933 mm |
Rear Axle - Centerline to Bumper | 3187 mm |
Front Axle Centerline to Fork Tip | 5023 mm |
Wheel Base | 4550 mm |
Maximum Overall Length | 12761 mm |
Ground to Lower Hitch Clearance | 568 mm |
Ground to Center of Front Axle | 978 mm |
Fork Height with Level Arms | 2474 mm |
Fork Top Clamp Opening | 4006 mm |
Fork Height at Maximum Lift | 5242 mm |
Hinge Pin Height at Maximum Lift | 4918 mm |
Dump Angle at Maximum Lift | -39.4 ° |