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    988 GC Wheel Loader
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    990 Wheel Loader
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    988 XE Wheel Loader
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    Engine
    Engine Model Cat® C15 C27 Cat® Cat® C18 ™
    Rated Speed 2000 1,800/min 1,700 rpm
    Peak Power Speed 1600 - 1,500 rpm
    Engine Power - ISO 14396 449 HP 752 HP -
    Gross Power - SAE J1995 456 HP 766 HP -
    Net Power - SAE J1349 373 HP - 538 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
    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 - 2230 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 -
    Engine Power - ISO 14396:2002 - - 580 HP
    Gross Power - SAE J1995:2014 - - 588 HP

    Operating Specifications
    Operating Weight 116858 lb 178517 lb 116362 lb
    Rated Payload - Quarry Face 12.5 ton (US) - -
    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 -
    Rated Payload - Standard - 17.5 ton (US) -
    Rated Payload - High Lift - 17.5 ton (US) -
    Cat Truck Match - Standard - 773-775 -
    Operating Weight - Standard - - 116362 lb
    Operating Weight - High Lift - - 119618 lb
    Rated Payload - Standard (Quarry Face) - - 12.5 ton (US)
    Rated Payload - Loose Material (Standard) - - 16 ton (US)

    Transmission
    Transmission Type Cat planetary power shift Cat planetary power shift Cat switched reluctance electric drive
    Forward - 1 5 mile/h 4.5 mile/h -
    Forward - 2 8 mile/h 8.3 mile/h -
    Reverse - 1 5 mile/h 4.9 mile/h -
    Reverse - 2 8 mile/h 9.1 mile/h -
    Direct Drive - Forward 1 Lock-up disabled Lock-up disabled -
    Direct Drive - Forward 2 8 mile/h 8.5 mile/h -
    Direct Drive - Forward 3 14 mile/h 15.2 mile/h -
    Direct Drive - Forward 4 24 mile/h - -
    Direct Drive - Reverse 1 Lock-up disabled 5.4 mile/h -
    Direct Drive - Reverse 2 9 mile/h 9.6 mile/h -
    Direct Drive - Reverse 3 16 mile/h 16.4 mile/h -
    Direct Drive - Reverse 4 25.4 mile/h - -
    Forward - 3 - 14.2 mile/h -
    Reverse - 3 - 15.5 mile/h -
    Note - Travel speeds based on Michelin 45/65R39 LD D2**L5 tires. -
    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

    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 -
    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) -
    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) -
    Pilot System Variable displacement piston Open loop and pressure reducing -
    Tilt Cylinder - Stroke 27 in - 27 in
    Maximum Flow at 1,800 rpm (1) - 240 gal/min -
    Relief Valve Setting - Main - 507 psi -
    Lift/Tilt System - Pump - - Variable displacement piston
    Maximum Flow at 1,400-1,600 rpm - - 153 gal/min
    Lift Cylinder - Bore - - 8.7 in
    Lift Cylinder - Stroke - - 41.3 in
    Tilt Cylinder - Bore - - 8.7 in

    Hydraulic Cycle Times
    Rack Back 3.8 s 4.3 s 4.5 s
    Raise 7.5 s 8.2 s 8 s
    Dump 3 s 2.9 s 2.2 s
    Lower Float Down 4.6 s 3.6 s 3.5 s
    Total Hydraulic Cycle Time - Empty Bucket 18.9 s 13.8 s -
    Lower - 3.7 s -
    Total Hydraulic Cycle Time - - 18.2 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) - -
    Relief Valve Setting - Steering 4000 psi 5004 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 -
    Maximum Flow at 1,400-1,600 rpm - - 71.3 gal/min
    Steering Cut Off Pressure - - 4351 psi

    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) 147 gal (US)
    Cooling System 27 gal (US) 54.9 gal (US) -
    Engine Crankcase 9 gal (US) 20 gal (US) 16 gal (US)
    Diesel Exhaust Fluid Tank 5.5 gal (US) - 8.7 gal (US)
    Transmission 20 gal (US) 29.1 gal (US) 16 gal (US)
    Differential - Final Drives - Front 49 gal (US) 71.6 gal (US) 49 gal (US)
    Differential - Final Drives - Rear 45 gal (US) 68.9 gal (US) 49 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 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
    Hydraulic System Factory Fill - 210 gal (US) -
    Hydraulic Tank - Implement and Hydraulic Fan - 68.9 gal (US) -
    Hydraulic Tank - Steering and Braking - 34.9 gal (US) -
    Cooling System - Jacket Water - - 30 gal (US)
    Cooling Systems - Power Train - - 8 gal (US)
    Hydraulic System - Implement/Steering - - 126 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 - 13.8 ft
    Ground to Top of Exhaust Stacks 13.3 ft - 14.8 ft
    Ground to Top of Hood 10.7 ft - 10.9 ft
    Rear Axle - Centerline to Bumper 10.3 ft - 10.5 ft
    Front Axle Centerline to Bucket Tip 15.7 ft - 15.3 ft
    Wheel Base 12.5 ft - 14.9 ft
    Maximum Overall Length 39.5 ft - 40.7 ft
    Ground to Lower Hitch Clearance 1.5 ft - 1.9 ft
    Clearance at Maximum Lift 12 ft - 13.3 ft
    B-Pin Height - Maximum Lift 18.7 ft - 19.3 ft
    Maximum Overall Height - Bucket Raised 25 ft - 25.8 ft
    Reach - Maximum Lift 7.7 ft - 6.8 ft
    Note Specifications are calculated with 6.9 m3 (9.0 yd3 ) rock bucket equipped with Michelin XLDD1 35/65 R33 tires. - 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 Bumper Clearance - - 3.1 ft
    Ground to Center of Axles - - 3.2 ft

    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% - 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) -

    Sound Performance - Tier 4 Final / Stage V - Standard
    Operator Sound Pressure Level (ISO 6396:2008) - - 72 dB(A)
    Machine Sound Power Level (ISO 6395:2008) - - 109 dB(A)

    Sound Performance - Tier 3 / Stage III - Standard
    Operator Sound Pressure Level (ISO 6396:2008) - - 72 dB(A)
    Machine Sound Power Level (ISO 6395:2008) - - 110 dB(A)

    Dimensions (Approximate) - Standard Lift
    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
    Ground to Bumper Clearance - - 3.1 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
    Ground to Center of Axles - - 3.2 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
    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.

    Dimensions - Millyard Linkage
    Ground to Top of ROPS - - 13.8 ft
    Ground to Top of Exhaust Stacks - - 13.8 ft
    Ground to Top of Hood - - 10.9 ft
    Ground to Bumper Clearance - - 3.1 ft
    Rear Axle - Centerline to Bumper - - 10.5 ft
    Front Axle Centerline to Fork Tip - - 16.5 ft
    Wheel Base - - 14.9 ft
    Maximum Overall Length - - 41.9 ft
    Ground to Lower Hitch Clearance - - 1.9 ft
    Ground to Center of Front Axle - - 3.2 ft
    Fork Height with Level Arms - - 8.1 ft
    Fork Top Clamp Opening - - 13.1 ft
    Fork Height at Maximum Lift - - 17.2 ft
    Hinge Pin Height at Maximum Lift - - 16.1 ft
    Dump Angle at Maximum Lift - - -39.4 °
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