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.
Engine
- Net Power
- 541 HP
- Engine Model
- Cat® C18 ™
- Bore
- 5.7 in
- Stroke
- 7.2 in
- Displacement
- 1105 in³
- Rated Speed
- 1,700 rpm
- Emissions
- U.S. EPA Tier 4 Final/EU Stage V
- Gross Power - ISO 14396
- 580 HP
- Net Power - SAE J1349
- 541 HP
- Peak Power Speed
- 1,500 rpm
- Peak Power Speed - 1,500 rpm - Gross - ISO 14396
- 580 HP
- Peak Power Speed - 1,500 rpm - Gross - SAE J1995
- 588 HP
- Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
- 541 HP
- Peak Torque @ (speed) - SAE J1995
- 2104 ft·lbf
- Torque Rise
- 58%
Operating Specifications
- Operating Weight
- 116362 lb
- Rated Payload - Standard (Quarry Face)
- 12.5 ton (US)
- Rated Payload - Loose Material (Standard)
- 16 ton (US)
- Bucket Capacity Range
- 4.7-13 m3 (6.2-17 yd3)
- Operating Weight - High Lift
- 119618 lb
- Operating Weight - Standard
- 116362 lb
Buckets
- Bucket Capacities
- 4.7-13 m3 (6.2-17 yd3)
Transmission
- Transmission Type
- Cat switched reluctance electric drive
- Forward 1 (virtual)
- 4.3 mile/h
- Forward 2 (virtual)
- 7 mile/h
- Forward 3 (virtual)
- 13.8 mile/h
- Forward 4 (virtual)
- 20 mile/h
- Reverse 1 (virtual)
- 4.3 mile/h
- Reverse 2 (virtual)
- 7 mile/h
- Reverse 3 (virtual)
- 17.5 mile/h
Axles
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13°
Service Refill Capacities
- Fuel Tank
- 147 gal (US)
- Transmission
- 16 gal (US)
- Cooling System - Jacket Water
- 30 gal (US)
- Cooling Systems - Power Train
- 8 gal (US)
- Diesel Exhaust Fluid Tank
- 8.7 gal (US)
- Differential - Final Drives - Front
- 49 gal (US)
- Differential - Final Drives - Rear
- 49 gal (US)
- Engine Crankcase
- 16 gal (US)
- Hydraulic System - Implement/Steering
- 126 gal (US)
- Note
- All non-road Tier 4 Final/Stage IV 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) or up to B20 biodiesel when feedstock meeting ASTM D7467 specificat
Hydraulic System - Lift/Tilt
- Lift Cylinder - Bore
- 8.7 in
- Lift Cylinder - Stroke
- 41.3 in
- 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
- 153 gal/min
- Relief Valve Setting - Lift/Tilt
- 4757 psi
- Tilt Cylinder - Bore
- 8.7 in
- Tilt Cylinder - Stroke
- 27 in
Hydraulic System - Steering
- Maximum Flow at 1,400-1,600 rpm
- 71.3 gal/min
- Steering Cut Off Pressure
- 4351 psi
- Steering Cycle Times - High Idle
- 3.4 s
- Steering Cycle Times - Low Idle
- 5.6 s
- Steering System - Circuit
- Pilot, load sensing
- Steering System - Pump
- Piston, variable displacement
- Total Steering Angle
- 86°
- Steering
- ISOÂ 5010:2007
Hydraulic Cycle Times
- Dump
- 2.2 s
- Lower Float Down
- 3.5 s
- Rack Back
- 4.5 s
- Raise
- 8 s
- Total Hydraulic Cycle Time
- 18.2 s
Sound Performance - Tier 4 Final/Stage IV
- Machine Sound Level (ISO 6395)
- 109 dB(A)
- Operator Sound Level (ISO 6396)
- 72 dB(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.
Air Conditioning System
- 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.
Dimensions (Approximate) - High Lift
- B-Pin Height - Maximum Lift
- 19.3 ft
- Clearance at Maximum Lift
- 12.7 ft
- Front Axle Centerline to Bucket Tip
- 15.9 ft
- Ground to Bumper Clearance
- 3.1 ft
- Ground to Center of Axles
- 3.2 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Ground to Top of ROPS
- 13.7 ft
- Maximum Overall Height - Bucket Raised
- 25.8 ft
- Maximum Overall Length
- 41.3 ft
- 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.
- Reach - Maximum Lift
- 7 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Wheel Base
- 14.9 ft
Dimensions (Approximate) - Standard Lift
- B-Pin Height - Maximum Lift
- 18 ft
- Clearance at Maximum Lift
- 11.3 ft
- Front Axle Centerline to Bucket Tip
- 14.7 ft
- Ground to Bumper Clearance
- 3.1 ft
- Ground to Center of Axles
- 3.2 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Ground to Top of ROPS
- 13.7 ft
- Maximum Overall Height - Bucket Raised
- 24.5 ft
- Maximum Overall Length
- 40 ft
- 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.
- Reach - Maximum Lift
- 6.8 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Wheel Base
- 14.9 ft
Operator's Cab
- ROPS/FOPS
- ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Brakes
- Brakes
- ISOÂ 3450:2011
