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    988 GC Wheel Loader
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    Engine
    Engine Model Cat® C15 Cat® C32B Cat® 3516E
    Rated Speed 2000 1750 rpm -
    Peak Power Speed 1600 - -
    Engine Power - ISO 14396 449 HP - 1847 HP
    Gross Power - SAE J1995 456 HP - 1870 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, U.S. EPA Tier 2 Equivalent U.S. EPA Tier 4 Final/EU Stage V or U.S. EPA Tier 1 equivalent
    Bore 5.4 in 5.7 in 6.7 in
    Stroke 6.75 in 6.4 in 8.5 in
    Displacement 927 in³ 1963.5 in³ 4766 in³
    Peak Torque - 1,200 rpm - SAE J1995 1778 ft·lbf - 8549 lb/ft
    Torque Rise 16% - 39%
    Net Power - 814 HP -
    Gross Power - SAE J1995 at 1,750 rpm - Tier 4/HRC (Highly Regulated Country) - Standard - 900 HP -
    Gross Power - SAE J1995 at 1,750 rpm - Tier 4/HRC - High Ambient - 937 HP -
    Gross Power - SAE J1995 at 1,750 rpm - Tier 2/LRC (Less Regulated Country) - Standard - 907 HP -
    Gross Power - SAE J1995 at 1,750 rpm - Tier 2/LRC - High Ambient - 944 HP -
    Gross Power - ISO 14396 at 1,750 rpm - Tier 4/HRC - Standard - 884 HP -
    Gross Power - ISO 14396 at 1,750 rpm - Tier 4/HRC - High Ambient - 921 HP -
    Gross Power - ISO 14396 at 1,750 rpm - Tier 2/LRC - Standard - 893 HP -
    Gross Power - ISO 14396 at 1,750 rpm - Tier 2/LRC - High Ambient - 931 HP -
    Net Power - SAE J1349 at 1,750 rpm - Tier 4/HRC - Standard - 814 HP -
    Net Power - SAE J1349 at 1,750 rpm - Tier 4/HRC - High Ambient - 814 HP -
    Net Power - SAE J1349 at 1,750 rpm - Tier 2/LRC - Standard - 823 HP -
    Net Power - SAE J1349 at 1,750 rpm - Tier 2/LRC - High Ambient - 823 HP -
    Peak Torque - SAE J1995 - Tier 4/HRC - Standard @ 1,200 rpm - 3514 ft·lbf -
    Peak Torque - SAE J1995 - Tier 4/HRC - High Ambient @ 1,300 rpm - 3555 ft·lbf -
    Peak Torque - SAE J1995 - Tier 2/LRC - Standard @ 1,200 rpm - 3537 ft·lbf -
    Peak Torque - SAE J1995 - Tier 2/LRC - High Ambient @ 1,350 rpm - 3570 ft·lbf -
    Net Power - SAE J1349 - Standard Ambient - - 1739 HP
    Net Power - SAE J1349 - High Ambient - - 1696 HP
    Note (1) - - The power ratings apply when tested under the reference conditions for the specified standard.
    Note (2) - - The net power advertised is the power available at the flywheel when the engine is equipped with fan, alternator, air cleaner and muffler.
    Note (3) - - The gross power advertised is with the fan at maximum speed.

    Operating Specifications
    Operating Weight 116858 lb 233430 lb -
    Rated Payload - Quarry Face 12.5 ton (US) - -
    Bucket Capacity Range 6.4-7.6 m3 (8.3-10 yd3) 11.5-24.5 m³ (15-32 yd³) 17.2-43.6 m3 (22.3-57 yd3)
    Cat Truck Match - High Lift 772/773/775 785 789/793/794
    Rated Payload - Standard - 25.5 ton (US) -
    Rated Payload - Standard (Material Handler) - 30 ton (US) -
    Rated Payload - High Lift - 22.5 ton (US) -
    Rated Payload - High Lift (Material Handler) - 27 ton (US) -
    Cat Truck Match - Standard - 775/777 785/789
    Operating Weight - Standard - - 543772 lb
    Operating Weight - High Lift - - 547675 lb
    Rated Payload - Standard Lift (Low to Moderate Digging Resistance) - - 60 ton (US)
    Rated Payload - Standard Lift (Moderate to High Digging Resistance) - - 50 ton (US)
    Rated Payload - High Lift (Low to Moderate Digging Resistance) - - 55 ton (US)
    Rated Payload - High Lift (Moderate to High Digging Resistance) - - 50 ton (US)
    Note - - *Please contact your local dealer to determine if your application is suitable for this increased rated payload.

    Transmission
    Transmission Type Cat planetary power shift Cat Planetary Powershift Cat Planetary Power Shift
    Forward - 1 5 mile/h 4.3 mile/h 4.6 mile/h
    Forward - 2 8 mile/h 7.4 mile/h 8 mile/h
    Reverse - 1 5 mile/h 4.7 mile/h 5 mile/h
    Reverse - 2 8 mile/h 8.1 mile/h 8.8 mile/h
    Direct Drive - Forward 1 Lock-up disabled Disabled Lock-up disables
    Direct Drive - Forward 2 8 mile/h 8 mile/h 8.7 mile/h
    Direct Drive - Forward 3 14 mile/h 14 mile/h 15.2 mile/h
    Direct Drive - Forward 4 24 mile/h - -
    Direct Drive - Reverse 1 Lock-up disabled 5 mile/h Lock-up disables
    Direct Drive - Reverse 2 9 mile/h 8.8 mile/h 9.6 mile/h
    Direct Drive - Reverse 3 16 mile/h 15.3 mile/h 16.8 mile/h
    Direct Drive - Reverse 4 25.4 mile/h - -
    Forward - 3 - 12.7 mile/h 13.6 mile/h
    Reverse - 3 - 13.9 mile/h 14.9 mile/h
    Note - - Travel speeds based on 58/85-57 tires.

    Hydraulic System - Lift/Tilt
    Lift/Tilt System - Circuit EH - Load Sense Positive Flow Control Positive Flow Control
    Lift/Tilt System 2X x 145 cc Variable displacement piston - -
    Maximum Flow at 2,165 rpm 159 gal/min 250 gal/min -
    Relief Valve Setting - Lift/Tilt 4598 psi 5000 psi 5004 psi
    Cylinders, Double Acting - Lift, Bore and Stroke 190 mm x 1216 mm (7.5 in x 48 in) - 370 × 1713 mm (14.6 × 67.4 in)
    Cylinders, Double Acting - Tilt, Bore and Stroke 170 mm x 722 mm (6.7 in x 28.4 in) - 310 × 1086 mm (12.2 × 42.8 in)
    Pilot System Variable displacement piston - Open Loop and Pressure Reducing
    Tilt Cylinder - Stroke 27 in 41.5 in -
    Lift/Tilt System - Pump - Variable Displacement Piston Variable Displacement Piston
    Lift Cylinder - Bore - 9.3 in -
    Lift Cylinder - Stroke - 63.5 in -
    Tilt Cylinder - Bore - 11.5 in -
    Maximum Flow at 1,700 rpm Engine Speed - - 541 gal/min

    Hydraulic Cycle Times
    Rack Back 3.8 s 2.3 s 4.9 s
    Raise 7.5 s 9 s 12.6 s
    Dump 3 s 2.6 s 3.1 s
    Lower Float Down 4.6 s - 4.2 s
    Total Hydraulic Cycle Time - Empty Bucket 18.9 s - -
    Rack Back - High Lift - 2.3 s -
    Raise - High Lift - 9 s -
    Dump - High Lift - 2.6 s -
    Float Down - 3.2 s -
    Float Down - High Lift - 3.2 s -
    Total Hydraulic Cycle Time - 17.1 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 - -
    Total Steering Angle 70° 80° 80 degrees
    Steering Cycle Times - High Idle 3 s 3.1 s 4.3 s
    Steering Cycle Times - Low Idle 5.2 s 4.9 s 7.6 s
    Maximum Flow at 1,400-1,850 rpm - 70 gal/min -
    Steering Cut Off Pressure - 4500 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. - -

    Axles
    Front Fixed Fixed Fixed
    Rear Trunnion Trunnion Trunnion
    Oscillation Angle +/-12.5° ±9° 9°

    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 - -

    Service Refill Capacities
    Fuel Tank 141 gal (US) 385.7 gal (US) -
    Cooling System 27 gal (US) - -
    Engine Crankcase 9 gal (US) - -
    Diesel Exhaust Fluid Tank 5.5 gal (US) - -
    Transmission 20 gal (US) 51.5 gal (US) -
    Differential - Final Drives - Front 49 gal (US) 96.4 gal (US) -
    Differential - Final Drives - Rear 45 gal (US) 96.4 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 - -
    Cooling Systems - 59.4 gal (US) -
    Crankcase - 31.7 gal (US) -
    Hydraulic System Factory Fill (Implement) - 104.1 gal (US) -
    Hydraulic Tank - Implement - 60.2 gal (US) -
    Hydraulic Factory Fill (Steering) - 32.5 gal (US) -
    Hydraulic Tank (Steering Tank Only) - 26.3 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) 11.5-24.5 m³ (15-32 yd³) -

    Sustainability
    Recyclability 96% - -

    Cooling System
    Ambient Capability Hydraulically Driven Demand Fan - Standard - 109.4 °F 109.4 °F
    Ambient Capability, Hydraulically Driven Demand Fan - High - 131 °F -
    Ambient Capability Hydraulically Driven Demand Fan - High (Tier 1 equivalent) - - 131 °F
    Ambient Capability Hydraulically Driven Demand Fan - High (Tier 4 Final) - - 127.4 °F

    Sound Performance - Standard
    Note - Machine Sound Level (ISO 6396:2008) - 116 dB(A) The declared sound levels listed above include the addition of both measurement uncertainty and uncertainty due to production variation. Typical measurement uncertainty for this type of machine is 2 dBA in accordance with "ISO 4871". The measurement was c
    Operator Sound Level (ISO 6396:2008) - Tier 1/EU Stage I Equivalent - - 74 dB(A)
    Machine Sound Level (ISO 6395:2008) - - 119 dB(A)

    Sound Performance - Suppression
    Note - Machine Sound Level (ISO 6396:2008) - 113 dB(A) The declared sound levels listed above include the addition of both measurement uncertainty and uncertainty due to production variation. Typical measurement uncertainty for this type of machine is 2 dBA in accordance with "ISO 4871". The measurement was c
    Operator Sound Level (ISO 6396:2008) - Tier 1/EU Stage I Equivalent - - 73 dB(A)
    Machine Sound Level (ISO 6395:2008) - - 117 dB(A)

    Dimensions - Standard Lift - Approximate
    Ground to Top of Exhaust Stacks - 17 ft 23.2 ft
    Ground to Top of ROPS - 18.3 ft 23.4 ft
    Ground to Top of Hood - 13.1 ft 18.6 ft
    Ground to Center of Front Axle - 4.3 ft -
    Ground to Bumper Clearance - 3.8 ft 4.4 ft
    Ground to Lower Hitch Clearance - 2.2 ft 2.9 ft
    Reach - Maximum Lift - 8.2 ft 9.6 ft
    Clearance at Maximum Lift - 15.2 ft 19.8 ft
    B-Pin Height - Maximum Lift - 22.8 ft 28.8 ft
    Maximum Overall Height - Bucket Raised - 30.8 ft 39.3 ft
    Rear Axle - Centerline to Bumper - 13.5 ft 20.4 ft
    Tread Width - 10.83 ft 14.1 ft
    Rack Back Angle - Maximum Lift - 56.9 degrees -
    Dump Angle at Maximum Lift - -49.5 degrees –50.0 degrees
    Rack Back Angle - Ground Level - 40.2 degrees 39.7 degrees
    Width - Over Tires - With Bulge - 14.74 ft 18.8 ft
    Rack Back Angle - Carry - 48.9 degrees 47.7 degrees
    Wheel Base - 19.3 ft 22.3 ft
    Maximum Overall Length - 50.8 ft 64.6 ft
    Front Axle Centerline to Bucket Tip - 18 ft 21.9 ft
    Ground to Center of Axles - - 6 ft
    Note - - Assumes loaded 58/85-57 tires, tires at a static loaded radius of 1830 mm (6 ft), 596-5330 26 m3 (34 yd3) bucket, 431-0064 HD tips.
    Rack Angle at Maximum Lift - - 59.5 degrees

    Dimensions - High Lift - Approximate
    Tread Width - 10.83 ft 14.1 ft
    Rack Back Angle - Ground Level - 42.5 degrees 45 degrees
    Dump Angle at Maximum Lift - -48.1 degrees –50.0 degrees
    Rack Back Angle - Maximum Lift - 56.2 degrees -
    Width - Over Tires - With Bulge - 14.75 ft 18.8 ft
    Rack Back Angle - Carry - 51.6 degrees 53.5 degrees
    Ground to Top of Exhaust Stacks - 17 ft 23.2 ft
    Ground to Top of ROPS - 18.3 ft 23.4 ft
    Ground to Top of Hood - 13.1 ft 18.6 ft
    Ground to Center of Front Axle - 4.3 ft -
    Ground to Bumper Clearance - 3.8 ft 4.4 ft
    Ground to Lower Hitch Clearance - 2.2 ft 2.9 ft
    Reach - Maximum Lift - 7.6 ft 9.4 ft
    Clearance at Maximum Lift - 17.2 ft 22.6 ft
    B-Pin Height - Maximum Lift - 24.5 ft 31.6 ft
    Maximum Overall Height - Bucket Raised - 32 ft 42.1 ft
    Rear Axle - Centerline to Bumper - 13.5 ft 20.4 ft
    Wheel Base - 19.3 ft 22.3 ft
    Maximum Overall Length - 51.6 ft 66.9 ft
    Front Axle Centerline to Bucket Tip - 18.8 ft 24.2 ft
    Ground to Center of Axles - - 6 ft
    Note - - Assumes loaded 58/85-57 tires, tires at a static loaded radius of 1830 mm (6 ft), 596-5330 26 m3 (34 yd3) bucket, 431-0064 HD tips.
    Rack Angle at Maximum Lift - - 59.4 degrees

    Complete System Fill
    Fuel Tank - Standard - - 856 gal (US)
    Fuel Tank - With 24 hr Attachment - - 1414 gal (US)
    Cooling System - - 138 gal (US)
    Engine Crankcase - - 76 gal (US)
    Transmission - - 110 gal (US)
    Differential - Final Drives - Front - - 220 gal (US)
    Differential - Final Drives - Rear - - 200 gal (US)
    Hydraulic Tank - Implement and Hydraulic Fan - - 270 gal (US)
    Hydraulic Tank - Steering and Braking - - 100 gal (US)
    Oil Renewal System (ORS)* - - 20 gal (US)
    Note - - *Not available on Tier 4 Final/Stage V machines. Not available in all regions.
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