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988 GC Wheel Loader
990 Wheel Loader
988 Wheel Loader

Engine

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

Operating Specifications

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

Transmission

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

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit EH - Load Sense Positive flow control EH- Positive Flow Control, Flow Sharing
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 4786 psi 4757 psi
Cylinders, Double Acting - Lift, Bore and Stroke 190 mm x 1216 mm (7.5 in x 48 in) 235 mm × 1287 mm (9.3 in × 50.7 in) 210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke 170 mm x 722 mm (6.7 in x 28.4 in) 292.1 mm × 820 mm (11.5 in × 32.3 in) 269 mm × 685 mm (8.7 in × 27 in)
Pilot System Variable displacement piston Open loop and pressure reducing Variable displacement piston
Tilt Cylinder - Stroke 27 in - -
Maximum Flow at 1,800 rpm (1) - 240 gal/min -
Relief Valve Setting - Main - 507 psi 551 psi
Maximum Flow at 1,400-1,860 rpm - - 153 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 5004 psi 4351 psi
Total Steering Angle 70° 70° 86 °
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 2.7 kg of refrigerant which has a CO2 equivalent of 3.861 metric tonnes (4.256 tons). 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.

Axles

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

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) 294.3 gal (US) 188 gal (US)
Cooling System 27 gal (US) 54.9 gal (US) 31.7 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) 29.1 gal (US) 31.7 gal (US)
Differential - Final Drives - Front 49 gal (US) 71.6 gal (US) 49.1 gal (US)
Differential - Final Drives - Rear 45 gal (US) 68.9 gal (US) 49.1 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 -
Hydraulic System Factory Fill - 210 gal (US) 125.5 gal (US)
Hydraulic Tank - Implement and Hydraulic Fan - 68.9 gal (US) -
Hydraulic Tank - Steering and Braking - 34.9 gal (US) -
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 - Tank Only - - 63.4 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) 8.6 m³ – 10.0 m³ (11.25 yd³ – 13.0 yd³) 4.7-13 m3 (6.2-17 yd3)

Sustainability

Recyclability 96% - -

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) -

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
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