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    988 Wheel Loader
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    Engine
    Engine Power - ISO 14396:2002 580 hp - -
    Engine Model Cat® C18 Cat C3.6 Cat C2.4*
    Rated Speed 1700/rpm - -
    Peak Power Speed 1500/rpm - -
    Gross Power - SAE J1995:2014 588 hp - -
    Net Power - SAE J1349:2011 538 hp - -
    Bore 5.7 in 3.85 in 3.4 in
    Stroke 7.2 in 4.72 in 4 in
    Displacement 1105 in³ 220 in³ 147 in²
    Peak Torque - 1,200 rpm 2104 lbf·ft - -
    Torque Rise 58 % - -
    Note (1) Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emissio - -
    Note (2) Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. - -
    Maximum Gross Power - 110 hp 42 hp
    Rated Net Power - Rated Engine Speed - 2200 r/min -
    Maximum Gross Power - Rated Engine Speed - 1800 r/min -
    Rated Net Power - SAE J1349 - 99 hp -
    Maximum Gross Power - ISO 14396 (metric) - 112 hp -
    Rated Net Power - ISO 9249 - 98 hp -
    Maximum Gross Torque - SAE J1995 - 335 ft·lbf -
    Maximum Gross Torque - ISO 14396 - 332 ft·lbf -
    Maximum Net Torque - SAE J1349 - 329 ft·lbf -
    Maximum Net Torque - ISO 9249 - 327 ft·lbf -
    Emissions - Engine meets Tier 4 Final/Stage V emission standards. -
    Note - Net power advertised is the power available at the flywheel plus front drive implement pump when the engine is equipped with fan, air cleaner, muffler and alternator. *Engine meets U.S. EPA Tier 4 Final emission standards.
    Maximum Gross Power - ISO 14396 - 110 hp -
    Gross Power - - 42 hp
    Net Power - 2,200 rpm - SAE J1349 R-ing - - 40 hp
    Net Power - 2,200 rpm - ISO 9249 R-ing - - 40 hp

    Operating Specifications
    Operating Weight 112574 lb - -
    Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3) - -
    Rated Payload - Quarry Face 12.5 t - -
    Rated Payload - Loose Material 16 t - -
    Cat Truck Match - Standard 770 - 772 - -
    Cat Truck Match - High Lift 773 - 775 - -

    Transmission
    Transmission Type Cat planetary powershift - -
    Forward - 1 4 mile/h - -
    Forward - 2 7.2 mile/h - -
    Forward - 3 12.7 mile/h - -
    Forward - 4 21.6 mile/h - -
    Reverse - 1 4.7 mile/h - -
    Reverse - 2 8.3 mile/h - -
    Reverse - 3 14.4 mile/h - -
    Direct Drive - Forward 1 Lock-up disabled - -
    Direct Drive - Forward 2 7.8 mile/h - -
    Direct Drive - Forward 3 13.9 mile/h - -
    Direct Drive - Forward 4 24.4 mile/h - -
    Direct Drive - Reverse 1 5 mile/h - -
    Direct Drive - Reverse 2 8.9 mile/h - -
    Direct Drive - Reverse 3 15.8 mile/h - -
    Note - *Creeper Control allows speed control from a stand still up to 10 km/h (6.3 mph). The Creeper Control will only work in Range 1. -
    Forward and Reverse - Speed Range 3 - 25 mile/h -
    Forward and Reverse - Speed Range 1* - 6.3 mile/h -
    Forward and Reverse - Speed Range 2* - 12.5 mile/h -
    Travel Speed - - 12.4 mile/h

    Hydraulic System - Lift/Tilt
    Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing - -
    Lift/Tilt System - Pump Variable displacement piston - -
    Maximum Flow at 1,400-1,860 rpm 153 gpm - -
    Relief Valve Setting - Lift/Tilt 4757 psi - -
    Cylinders, Double Acting - Lift, Bore and Stroke 210 mm × 1050 mm (8.7 in × 41.3 in) - -
    Cylinders, Double Acting - Tilt, Bore and Stroke 266 mm × 685 mm (8.7 in × 27 in) - -
    Pilot System Variable displacement piston - -
    Relief Valve Setting - Main 551 psi - -

    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 - -

    Hydraulic System - Steering
    Steering System - Circuit Pilot, load sensing - -
    Steering System - Pump Piston, variable displacement - -
    Maximum Flow at 1,400-1,600 rpm 71.3 gpm - -
    Relief Valve Setting - Steering 4351 psi - -
    Total Steering Angle 86 ° - -
    Steering Cycle Times - High Idle 3.4 s - -
    Steering Cycle Times - Low Idle 5.6 s - -

    Air Conditioning System
    Air Conditioning • The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. • If equipped with R134a (Global Warming Potential = 1430), the system - -

    Axles
    Front Fixed Fixed; Locking differential (standard) -
    Rear Trunnion Oscillating ±11 degrees; Locking differential (Standard) -
    Oscillation Angle 13 ° - -

    Brakes
    Brakes ISO 3450:2011 - -

    Operator's Cab
    ROPS/FOPS ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards - -

    Sound Performance - Tier 4 Final / Stage V
    Operator Sound Pressure Level (ISO 6396:2008) 73 dB(A) - -
    Machine Sound Power Level (ISO 6395:2008) 111 dB(A) - -
    Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A) - -
    Machine Sound Power Level (ISO 6395:2008)** 109 dB(A) - -
    Note (1) * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” - -
    Note (2) ** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. - -
    Note (3) The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. - -
    Note (4) The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. - -
    Note (5) 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. - -

    Sound Performance - Tier 3 / Stage IIIA
    Operator Sound Pressure Level (ISO 6396:2008) 73 dB(A) - -
    Machine Sound Power Level (ISO 6395:2008) 112 dB(A) - -
    Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A) - -
    Machine Sound Power Level (ISO 6395:2008)** 110 dB(A) - -
    Note (1) * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” - -
    Note (2) ** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. - -
    Note (3) The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. - -
    Note (4) The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. - -
    Note (5) 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. - -

    Service Refill Capacities
    Fuel Tank 188 gal (US) 43.6 gal (US) 11.4 gal (US)
    Cooling System 31.7 gal (US) 5.7 gal (US) 3 gal (US)
    Coolant (Validated by Test Cell Fill Quantities) 33 gal (US) - -
    Crankcase 15.9 gal (US) - -
    Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only) 8.7 gal (US) - -
    Transmission 24.3 gal (US) 0.8 gal (US) -
    Transmission - Validated by Test Cell Fill Quantities 29 gal (US) - -
    Differential - Final Drives - Front 49.1 gal (US) - -
    Differential - Final Drives - Rear 49.1 gal (US) - -
    Hydraulic System Factory Fill 125.5 gal (US) - -
    Hydraulic System - Tank Only 63.4 gal (US) - -
    Note • All non-road Tier 4 Final/Stage V 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 acid methyl ester DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1. -
    Axles - Rear Center Differential - 2 gal (US) -
    Hydraulic System - Including Tank - 25.9 gal (US) -
    Diesel Exhaust Fluid (DEF) Tank - 4.8 gal (US) -
    Engine Crankcase - 2.6 gal (US) -
    Hydraulic Tank - 14.5 gal (US) -
    Axles - Front Center Differential - 2 gal (US) -
    Hydraulic System - - 6.3 gal (US)
    Engine Oil - - 2.4 gal (US)

    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 - -

    Weights
    Operating Weight - 19103 lb 9414 lb

    Buckets
    Bucket Capacities - 1.3-3.5 m3 (1.7-4.6 yd3) 0.6-1.0 m3 (0.8-1.3 yd3)
    Bucket Capacities - General Purpose - 1.3-1.9 m³ (1.7-2.5 yd³) 0.6 m3 (0.8 yd3)
    Bucket Capacities - Light Material - 2.5-3.5 m³ (3.3-4.6 yd³) 1.0 m3 (1.3 yd3)

    Sustainability
    Recyclability - 95% 97%

    Cab
    ROPS - ISO 3471:2008 ISO 3471:2008
    FOPS - ISO 3449:2005 ISO 3449:2005 Level I
    Note (4) - *The measurements were conducted with the cab doors and windows closed. -
    Note (2) - The declared dynamic operator sound pressure levels per ISO 6396:2008*, when the cab is properly installed and maintained, is 77 dB(A). -
    Note (3) - The labelled sound power level for the CE marked configurations when measured according to the test procedure and conditions specified in 2000/14/EC (as amended by 2005/88/EC) is 103 dB(A). -
    Note (1) - Cab and Rollover Protective Structures (ROPS) are standard in North America and Europe. -

    Steering
    Maximum Flow - Steering Pump - 22 gpm -
    Number of Steering Wheel Turns - Full Left to Full Right or Full Right to Full Left - 3.75 turns -
    Steering Cycle Times - Full Left to Full Right - At 2,350 rpm: 90 rpm Steering Wheel Speed - 2.8 s -
    Maximum Working Pressure - Steering Pump - 3263 psi -
    Steering Articulation Angle - Each Direction - 40 ° -

    Loader Hydraulic System
    Relief Pressure - Tilt Cylinder - 3rd Function Maximum Working Pressure - 3046 psi -
    Maximum Flow - Implement Pump - 39 gpm -
    Maximum Flow - Implement Pump - 3rd Function, Maximum Flow, Standard - 24 gpm -
    Relief Pressure - Tilt Cylinder - 4th Function Maximum Working Pressure - 3046 psi -
    Hydraulic Cycle Time - Total Cycle Time - 12.5 s -
    Hydraulic Cycle Time - Raise, Ground Level to Maximum Lift - 5.2 s -
    Maximum Flow - Implement Pump - 4th Function, Maximum Flow - 24 gpm -
    Hydraulic Cycle Time - Dump, at Maximum Reach - 1.4 s -
    Relief Pressure - Tilt Cylinder - 4931 psi -
    Maximum Flow - Implement Pump - 3rd Function, Maximum Flow, High - 32 gpm -
    Maximum Working Pressure - Implement Pump - 4061 psi -
    Hydraulic Cycle Time - Rackback - 2.2 s -
    Hydraulic Cycle Time - Float Down, Maximum Lift to Ground Level - 3.7 s -
    Hydraulic Cycle Time - Lift - - 4.4 s
    Hydraulic Cycle Time - Dump - - 0.7 s

    Tires
    Other Choices Include - 17.5 R25 L3 XHA2; 17.5-25 L2/L3 SGL; 17.5-25 L3 HRL D/L-3A; 17.5 R25 L2 Snow; 17.5 R25 Solid -
    Note (1) - Other tire choices are available. Contact your Cat dealer for details. -
    Standard Size - 17.5 R25 L2 XTLA -
    Note (3) - Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model. -
    Note (2) - In certain applications, the loader’s productive capabilities may exceed the tire’s tonnes-km/h (ton-mph) capabilities. -

    Hydraulic System
    Main Relief - - 3481 psi
    3rd Auxiliary Flow - - 14 gpm
    Hydraulic Cycle Time - Lower, Float - - 2.4 s

    Dimensions (Approximate) - Standard Lift
    Cab Height - - 8.25 ft
    Ground Clearance - - 10 in
    Wheel Base - - 6.42 ft
    Overall Length - With Bucket* - - 15.75 ft
    Reach at Maximum Dump Height* - - 2.33 ft
    Dig Depth - - 6 in
    Maximum Dump Height* - - 7.5 ft
    Load Over Height - - 9.17 ft
    Hinge Pin at Maximum Height - - 10.08 ft
    Departure Angle - Degrees - - 30°
    Overall Length - With Forks - - 17.08 ft
    Reach - Ground Level - - 2.67 ft
    Maximum Reach - - 4.5 ft
    Fork Depth Above Ground - - 2 in
    Fork Height at Maximum Reach - - 4.67 ft
    Maximum Fork Height - - 9.83 ft
    Fork Reach at Maximum Height - - 2 ft
    Turning Radius - Over Bucket* - - 13.17 ft
    Turning Radius - Inside Tire** - - 5.92 ft
    Width - Over Bucket* - - 5.83 ft
    Tire Gauge - - 4.33 ft
    Machine Width** - - 5.58 ft
    Articulation Angle - - 40°
    Steering Angle - - 80°
    Dump Angle at Maximum Height - - 40°
    Note (1) - - *Vary with bucket size.
    Note (2) - - **Vary with tire size.
    Note (3) - - Dimensions listed are based on the machine configured with cab with air conditioning, remote quick coupler, general purpose bucket or 1067 mm (42 in) forks, 75 kg (165 lb) operator, 33 × 15.5-16.5, 12 PR tires, without ride control, without precleaner.

    Dimensions (Approximate) - High Lift
    Cab Height - - 8.25 ft
    Ground Clearance - - 10 in
    Wheel Base - - 6.42 ft
    Overall Length - With Bucket* - - 16.17 ft
    Reach at Maximum Dump Height* - - 2.42 ft
    Dig Depth - - 8 in
    Maximum Dump Height* - - 8 ft
    Load Over Height - - 9.67 ft
    Hinge Pin at Maximum Height - - 10.58 ft
    Departure Angle - Degrees - - 30°
    Overall Length - With Forks - - 17.58 ft
    Reach - Ground Level - - 3.25 ft
    Maximum Reach - - 4.92 ft
    Fork Depth Above Ground - - 2 in
    Fork Height at Maximum Reach - - 4.67 ft
    Maximum Fork Height - - 10.33 ft
    Fork Reach at Maximum Height - - 2 ft
    Turning Radius - Over Bucket* - - 13.42 ft
    Turning Radius - Inside Tire** - - 5.92 ft
    Width - Over Bucket* - - 5.83 ft
    Tire Gauge - - 4.33 ft
    Machine Width** - - 5.58 ft
    Articulation Angle - - 40°
    Steering Angle - - 80°
    Dump Angle at Maximum Height - - 40°
    Note (1) - - *Vary with bucket size.
    Note (2) - - **Vary with tire size.
    Note (3) - - Dimensions listed are based on the machine configured with cab with air conditioning, remote quick coupler, general purpose bucket or 1067 mm (42 in) forks, 75 kg (165 lb) operator, 33 × 15.5-16.5, 12 PR tires, without ride control, without precleaner.

    Operating Specifications - Standard Lift
    Tire Size - - 33 × 15.5-16.5, 12 PR
    Rated Bucket Capacity - - 0.8 yd³
    Breakout Force - - 6160 lbf
    Operating Weight - - 9414 lb
    Rated Operating Load at Full Turn - Bucket*** - - 2701 lb
    Straight Tipping Load - Bucket*** - - 6415 lb
    Full Turn Static Tipping Load - Bucket (ISO 14397-1*)*** - - 5401 lb
    Full Turn Static Tipping Load - Bucket (Rigid Tire**)*** - - 5512 lb
    Rack Back - Transport Position - - 51°
    Rated Operating Load at Full Turn - Forks (EN 474-3:2006, Firm and Level Ground, 500 mm [20 in] Load Center) (80% FTSTL)*** - - 3366 lb
    Rated Operating Load at Full Turn - Forks (EN 474-3:2006, Rough Terrain, 500 mm [20 in] Load Center) (60% FTSTL)*** - - 2524 lb
    Note (1) - - *Full compliance to ISO 14397-1 (2007) Sections 1 thru 6, which requires 2% verification be-tween calculation and testing.
    Note (2) - - **Compliance to ISO 14397-1 (2007) Sections 1 thru 5.
    Note (3) - - ***Manual quick coupler, precleaner hood.
    Note (4) - - Operating specifications shown are based on machine equipped with enclosed ROPS cab with air conditioning, remote quick coupler, 75 kg (165 lb) operator and general purpose bucket (GP), without ride control, without precleaner unless otherwise noted.

    Operating Specifications - High Lift
    Tire Size - - 33 × 15.5-16.5, 12 PR
    Rated Bucket Capacity - - 0.8 yd³
    Breakout Force - - 6204 lbf
    Operating Weight - - 9462 lb
    Rated Operating Load at Full Turn - Bucket*** - - 2502 lb
    Straight Tipping Load - Bucket*** - - 5975 lb
    Full Turn Static Tipping Load - Bucket (ISO 14397-1*)*** - - 5004 lb
    Full Turn Static Tipping Load - Bucket (Rigid Tire**)*** - - 5115 lb
    Rack Back - Transport Position - - 51°
    Rated Operating Load at Full Turn - Forks (EN 474-3:2006, Firm and Level Ground, 500 mm [20 in] Load Center) (80% FTSTL)*** - - 3148 lb
    Rated Operating Load at Full Turn - Forks (EN 474-3:2006, Rough Terrain, 500 mm [20 in] Load Center) (60% FTSTL)*** - - 2361 lb
    Note (1) - - *Full compliance to ISO 14397-1 (2007) Sections 1 thru 6, which requires 2% verification be-tween calculation and testing.
    Note (2) - - **Compliance to ISO 14397-1 (2007) Sections 1 thru 5.
    Note (3) - - ***Manual quick coupler, precleaner hood.
    Note (4) - - Operating specifications shown are based on machine equipped with enclosed ROPS cab with air conditioning, remote quick coupler, 75 kg (165 lb) operator and general purpose bucket (GP), without ride control, without precleaner unless otherwise noted.

    Maximum Material Densities - General Purpose
    Bucket Type - - General Purpose
    Rated Capacity - - 0.8 yd³
    Dump Height - - 90 in
    Maximum Material Density - - 3169 lb/yd³
    Bucket Width - - 70 in
    Note - - Based on ISO 7546:1983 and rated operating loads at full turn and standard linkage.

    Maximum Material Densities - Light Material
    Bucket Type - - Light Material
    Rated Capacity - - 1.3 yd³
    Dump Height - - 85 in
    Maximum Material Density - - 1989 lb/yd³
    Bucket Width - - 74 in
    Note - - Based on ISO 7546:1983 and rated operating loads at full turn and standard linkage.
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