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988 GC Wheel Loader
988 Wheel Loader
990 Wheel Loader

Engine

Engine Model Cat® C15 Cat® C18 ™ C27 Cat®
Rated Speed 2000 1700/min 1,800/min
Peak Power Speed 1600 1500/rpm -
Engine Power - ISO 14396 449 HP - 752 HP
Gross Power - SAE J1995 456 HP - 766 HP
Net Power - SAE J1349 373 HP - -
Emissions U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 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 U.S. EPA TIer 4 Final and EU Stage V emission standards or U.S. EPA Tier 2 and EU Stage II equivalent
Bore 5.4 in 5.7 in 5.4 in
Stroke 6.75 in 7.2 in 6 in
Displacement 927 in³ 1105 in³ 1649.5 in³
Peak Torque - 1,200 rpm - SAE J1995 1778 ft·lbf - -
Torque Rise 16% 58 % 18 %
Net Power - SAE J1349:2011 - 538 HP -
Engine Power - ISO 14396:2002 - 580 HP -
Gross Power - SAE J1995:2014 - 588 HP -
Peak Torque - 1,200 rpm - 2230 lb/ft 2624 lb/ft
Net Power - SAE J1349 - Standard Ambient - - 699 HP
Net Power - SAE J1349 - High Ambient - - 648 HP

Operating Specifications

Operating Weight 116858 lb 112574 lb 178517 lb
Rated Payload - Quarry Face 12.5 ton (US) 12.5 t -
Bucket Capacity Range 6.4-7.6 m3 (8.3-10 yd3) 4.7-13 m3 (6.2-17 yd3) 8.6 m³ – 10.0 m³ (11.25 yd³ – 13.0 yd³)
Cat Truck Match - High Lift 772/773/775 773~775 775-777
Rated Payload - Loose Material - 16 t -
Cat Truck Match - Standard - 770~772 773-775
Rated Payload - Standard - - 17.5 ton (US)
Rated Payload - High Lift - - 17.5 ton (US)

Transmission

Transmission Type Cat planetary power shift Cat planetary powershift Cat planetary power shift
Forward - 1 5 mile/h 4 mile/h 4.5 mile/h
Forward - 2 8 mile/h 7.2 mile/h 8.3 mile/h
Reverse - 1 5 mile/h 4.7 mile/h 4.9 mile/h
Reverse - 2 8 mile/h 8.3 mile/h 9.1 mile/h
Direct Drive - Forward 1 Lock-up disabled Lock-up disabled Lock-up disabled
Direct Drive - Forward 2 8 mile/h 7.8 mile/h 8.5 mile/h
Direct Drive - Forward 3 14 mile/h 13.9 mile/h 15.2 mile/h
Direct Drive - Forward 4 24 mile/h 24.4 mile/h -
Direct Drive - Reverse 1 Lock-up disabled 5 mile/h 5.4 mile/h
Direct Drive - Reverse 2 9 mile/h 8.9 mile/h 9.6 mile/h
Direct Drive - Reverse 3 16 mile/h 15.8 mile/h 16.4 mile/h
Direct Drive - Reverse 4 25.4 mile/h - -
Forward - 3 - 12.7 mile/h 14.2 mile/h
Forward - 4 - 21.6 mile/h -
Reverse - 3 - 14.4 mile/h 15.5 mile/h
Note - - Travel speeds based on Michelin 45/65R39 LD D2**L5 tires.

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit EH - Load Sense EH- Positive Flow Control, Flow Sharing Positive flow control
Lift/Tilt System 2X x 145 cc Variable displacement piston Variable displacement piston Variable displacement piston
Maximum Flow at 2,165 rpm 159 gal/min - -
Relief Valve Setting - Lift/Tilt 4598 psi 4757 psi 4786 psi
Cylinders, Double Acting - Lift, Bore and Stroke 190 mm x 1216 mm (7.5 in x 48 in) 210 mm × 1050 mm (8.7 in × 41.3 in) 235 mm × 1287 mm (9.3 in × 50.7 in)
Cylinders, Double Acting - Tilt, Bore and Stroke 170 mm x 722 mm (6.7 in x 28.4 in) 269 mm × 685 mm (8.7 in × 27 in) 292.1 mm × 820 mm (11.5 in × 32.3 in)
Pilot System Variable displacement piston Variable displacement piston Open loop and pressure reducing
Tilt Cylinder - Stroke 27 in - -
Maximum Flow at 1,400-1,860 rpm - 153 gal/min -
Relief Valve Setting - Main - 551 psi 507 psi
Maximum Flow at 1,800 rpm (1) - - 240 gal/min

Hydraulic Cycle Times

Rack Back 3.8 s - 4.3 s
Raise 7.5 s - 8.2 s
Dump 3 s - 2.9 s
Lower Float Down 4.6 s - 3.6 s
Total Hydraulic Cycle Time - Empty Bucket 18.9 s - 13.8 s
Lower - - 3.7 s

Hydraulic System - Steering

Steering System - Circuit Pilot, load sensing Pilot, load sensing Pilot, load sensing
Steering System - Pump Piston, variable displacement Piston, variable displacement Piston, variable displacement
Maximum Flow 52 gal (US) 71.3 gal/min -
Relief Valve Setting - Steering 4000 psi 4351 psi 5004 psi
Total Steering Angle 70° 86 ° 70°
Steering Cycle Times - High Idle 3 s 3.4 s -
Steering Cycle Times - Low Idle 5.2 s 5.6 s -
Maximum Flow at 1,400 rpm - - 96.2 gal/min

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. 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. The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 2.7 kg of refrigerant which has a CO2 equivalent of 3.861 metric tonnes (4.256 tons).

Axles

Front Fixed Fixed Fixed
Rear Trunnion Trunnion Trunnion
Oscillation Angle +/-12.5° 13 ° 8.5°

Brakes

Brakes ISO 3450:2011 ISO 3450:2011 ISO 3450: 2011

Operator's Cab

ROPS/FOPS ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards -

Service Refill Capacities

Fuel Tank 141 gal (US) 188 gal (US) 294.3 gal (US)
Cooling System 27 gal (US) 31.7 gal (US) 54.9 gal (US)
Engine Crankcase 9 gal (US) - 20 gal (US)
Diesel Exhaust Fluid Tank 5.5 gal (US) 8.7 gal (US) -
Transmission 20 gal (US) 31.7 gal (US) 29.1 gal (US)
Differential - Final Drives - Front 49 gal (US) 49.1 gal (US) 71.6 gal (US)
Differential - Final Drives - Rear 45 gal (US) 49.1 gal (US) 68.9 gal (US)
Note Cat U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels up to: - 20% biodiesel FAME (fatty a - All nonroad U.S. EPA Tier 4 diesel engines are required to use only Ultra Low Sulfur Diesel (ULSD) fuels containing 15 ppm (mg/kg) sulfur or less. Biodiesel blends up to B20 (20% blend by volume) are acceptable when blended with 15 ppm (mg/kg) sulfur or l
Coolant (Validated by Test Cell Fill Quantities) - 33 gal (US) -
Crankcase - 15.9 gal (US) -
Transmission - Validated by Test Cell Fill Quantities - 29 gal (US) -
Hydraulic System Factory Fill - 125.5 gal (US) 210 gal (US)
Hydraulic System - Tank Only - 63.4 gal (US) -
Hydraulic Tank - Implement and Hydraulic Fan - - 68.9 gal (US)
Hydraulic Tank - Steering and Braking - - 34.9 gal (US)

Sound Performance - Tier 4 Final/EU Stage V - Standard

Operator Sound Level (ISO 6396) 72 dB(A) - -
Machine Sound Level (ISO 6395) 110 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. - -

Dimensions (Approximate) - High Lift

Ground to Top of ROPS 13.5 ft - -
Ground to Top of Exhaust Stacks 13.3 ft - -
Ground to Top of Hood 10.7 ft - -
Rear Axle - Centerline to Bumper 10.3 ft - -
Front Axle Centerline to Bucket Tip 15.7 ft - -
Wheel Base 12.5 ft - -
Maximum Overall Length 39.5 ft - -
Ground to Lower Hitch Clearance 1.5 ft - -
Clearance at Maximum Lift 12 ft - -
B-Pin Height - Maximum Lift 18.7 ft - -
Maximum Overall Height - Bucket Raised 25 ft - -
Reach - Maximum Lift 7.7 ft - -
Note Specifications are calculated with 6.9 m3 (9.0 yd3 ) rock bucket equipped with Michelin XLDD1 35/65 R33 tires. - -

Buckets

Bucket Capacities 6.4-7.6 m3 (8.3-10 yd3) 4.7-13 m3 (6.2-17 yd3) 8.6 m³ – 10.0 m³ (11.25 yd³ – 13.0 yd³)

Sustainability

Recyclability 96% - -

Hydraulic Cycle Time (1,400-1,860 rpm)

Rack Back - 4.5 s -
Raise - 8 s -
Dump - 2.2 s -
Lower Float Down - 3.5 s -
Total Hydraulic Cycle Time - Empty Bucket - 18.2 s -

Sound Performance - Tier 4 Final / Stage V - Standard

Operator Sound Pressure Level (ISO 6396:2008) - 73 dB(A) -
Machine Sound Power Level (ISO 6395:2008) - 111 dB(A) -

Sound Performance - Tier 3 / Stage III - Standard

Operator Sound Pressure Level (ISO 6396:2008) - 73 dB(A) -
Machine Sound Power Level (ISO 6395:2008) - 112 dB(A) -

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS - 13.8 ft -
Ground to Top of Exhaust Stacks - 14.8 ft -
Ground to Top of Hood - 10.9 ft -
Rear Axle - Centerline to Bumper - 10.5 ft -
Front Axle Centerline to Bucket Tip - 14 ft -
Wheel Base - 14.9 ft -
Maximum Overall Length - 39.3 ft -
Ground to Lower Hitch Clearance - 1.9 ft -
Clearance at Maximum Lift - 11.9 ft -
B-Pin Height - Maximum Lift - 18 ft -
Maximum Overall Height - Bucket Raised - 24.5 ft -
Reach - Maximum Lift - 6.5 ft -

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS - 13.8 ft -
Ground to Top of Exhaust Stacks - 14.8 ft -
Ground to Top of Hood - 10.9 ft -
Rear Axle - Centerline to Bumper - 10.5 ft -
Front Axle Centerline to Bucket Tip - 15.3 ft -
Wheel Base - 14.9 ft -
Maximum Overall Length - 40.7 ft -
Ground to Lower Hitch Clearance - 1.9 ft -
Clearance at Maximum Lift - 13.3 ft -
B-Pin Height - Maximum Lift - 19.3 ft -
Maximum Overall Height - Bucket Raised - 25.8 ft -
Reach - Maximum Lift - 6.8 ft -

Sound Performance - Standard

Operator Sound Level (ISO 6396:2008) - - 65.5 dB(A)
Machine Sound Level (ISO 6395:2008) - - 115 dB(A)

Sound Performance - Suppression

Operator Sound Level (ISO 6396:2008) - - 65.5 dB(A)
Machine Sound Level (ISO 6395:2008) - - 113 dB(A)
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