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 988 Wheel Loader |
 938M Waste Handler Small Wheel Loader |
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Engine |
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| Net Power - SAE J1349:2011 | 538 hp | - | - |
| Engine Power - ISO 14396:2002 | 580 hp | 188 hp | - |
| Gross Power - SAE J1995:2014 | 588 hp | - | - |
| Engine Model | Cat® C18 ™ | Cat® C7.1 | - |
| Rated Speed | 1700/min | - | - |
| Peak Power Speed | 1500/rpm | - | - |
| Emissions | 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 | The Cat C7.1 engine meets U.S. EPA Tier 4 Final/EU Stage V and Korea Tier 4 Final emission standards. | - |
| Bore | 5.7 in | 4 in | - |
| Stroke | 7.2 in | 5 in | - |
| Displacement | 1105 in³ | 427 in³ | - |
| Peak Torque - 1,200 rpm | 2230 lb/ft | - | - |
| Torque Rise | 58 % | - | - |
| Maximum Gross Power | - | 188 hp | - |
| Maximum Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4) | - | 1800 r/min | - |
| Note (2) | - | Net power ratings are tested at the reference conditions for the specified standard and denote power available at the flywheel when the engine is equipped with alternator, air cleaner, emission components and fan at specified speed. | - |
| Maximum Net Torque - SAE J1349 (Performance [HP+] Power Mode: Range 1-4) | - | 649 ft·lbf | - |
| Maximum Gross Torque - ISO 14396 (Performance Power Mode: Range 1-4) | - | 664 ft·lbf | - |
| Maximum Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*) | - | 1600 r/min | - |
| Maximum Gross Power - ISO 14396 (Standard Power Mode: Range 1-3*) | - | 173 hp | - |
| Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*) | - | 642 ft·lbf | - |
| Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*) | - | 627 ft·lbf | - |
| Note (3) | - | No derating required up to 3000 m (10,000 ft) altitude. Auto derate protects hydraulic and transmission systems. | - |
| Maximum Gross Power - ISO 14396 (Performance Power Mode: Range 1-4) | - | 188 hp | - |
| Note (1) | - | *Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology. | - |
| Maximum Net Torque - ISO 9249:2007 (Performance Power Mode: Range 1-4) | - | 650 ft·lbf | - |
| Maximum Net Torque - ISO 9249:2007 (Standard Power Mode: Range 1-3*) | - | 628 ft·lbf | - |
| Net Power - ISO 9249 (metric) at Minimum Fan Speed (Performance Power Mode: Range 1-4) | - | 186 hp | - |
| Engine Power - ISO 14396 - Metric | - | 190 hp | - |
| Maximum Gross Power - ISO 14396 (metric) (Performance Power Mode: Range 1-4) | - | 190 hp | - |
| Net Power - ISO 9249 at Minimum Fan Speed (Performance Power Mode: Range 1-4) | - | 184 hp | - |
| Net Power - SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4) | - | 183 hp | - |
| Net Power (Standard Power Mode: Range 1-3*) | - | 1600 r/min | - |
| Net Power (Performance Power Mode: Range 1-4) | - | 1800 r/min | - |
| Maximum Gross Power - ISO 14396 (metric) (Standard Power Mode: Range 1-3*) | - | 176 hp | - |
| Net Power - ISO 9249 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | - | 170 hp | - |
| Net Power - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | - | 170 hp | - |
| Net Power - ISO 9249 (metric) at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | - | 172 hp | - |
Operating Specifications |
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| Operating Weight | 112574 lb | - | - |
| Rated Payload - Quarry Face | 12.5 t | - | - |
| Rated Payload - Loose Material | 16 t | - | - |
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) | - | - |
| Cat Truck Match - Standard | 770～772 | - | - |
| Cat Truck Match - High Lift | 773～775 | - | - |
| Note (1) | - | **Dimensions listed are for a machine configured with optional counterweights, waste guarding, 80 kg (176 lb) operator, and Michelin 20.5 R25 XMINE D2 tires. | - |
| Full Turn Tip Load (1) | - | 9795 kg (21,594 lb)** | - |
| Note (2) | - | ^Dimensions listed are for a machine configured with standard counterweights, waste guarding, rear waste gate, 80 kg (176 lb) operator, and new solid tires. | - |
| Full Turn Tip Load (2) | - | 10 741 kg (23,679 lb)^ | - |
Transmission |
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| 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 | - | - |
| Forward and Reverse - Range 2 | - | 8 mile/h | - |
| Forward and Reverse - Range 4 | - | 25 mile/h | - |
| Note | - | *Creeper control allows maximum speed range adjustability from 1 km/h (0.6 mph) to 13 km/h (8 mph) in Range 1 through the touch screen display when equipped. Factory default is 7 km/h (4.4 mph). | - |
| Forward and Reverse - Range 3 | - | 17 mile/h | - |
| Forward and Reverse - Range 1* | - | 1-13 km/h (0.6-8 mph) | - |
Hydraulic System - Lift/Tilt |
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| Lift/Tilt System - Circuit | EH- Positive Flow Control, Flow Sharing | - | - |
| Lift/Tilt System | Variable displacement piston | - | - |
| Maximum Flow at 1,400-1,860 rpm | 153 gal/min | - | - |
| 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 | 269 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) |
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| 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 |
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| Steering System - Circuit | Pilot, load sensing | - | - |
| Steering System - Pump | Piston, variable displacement | - | - |
| Maximum Flow | 71.3 gal/min | - | - |
| 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 |
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| 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 flourinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes. | - |
Axles |
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| Front | Fixed | - | - |
| Rear | Trunnion | - | - |
| Oscillation Angle | 13 ° | - | - |
Brakes |
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| Brakes | ISO 3450:2011 | - | - |
Operator's Cab |
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| ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards | - | - |
Service Refill Capacities |
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| Fuel Tank | 188 gal (US) | 51.5 gal (US) | - |
| Cooling System | 31.7 gal (US) | 8.5 gal (US) | - |
| Coolant (Validated by Test Cell Fill Quantities) | 33 gal (US) | - | - |
| Crankcase | 15.9 gal (US) | - | - |
| Diesel Exhaust Fluid Tank | 8.7 gal (US) | - | - |
| Transmission | 31.7 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) | - | - |
| Axles - Rear | - | 9.2 gal (US) | - |
| Axles - Front | - | 9.2 gal (US) | - |
| Transmission - Gear Box | - | 2.9 gal (US) | - |
| Hydraulic System - Including Tank | - | 44.9 gal (US) | - |
| Engine Crankcase | - | 5.3 gal (US) | - |
| Diesel Exhaust Fluid (DEF) Tank | - | 5 gal (US) | - |
| Hydraulic Tank | - | 23.8 gal (US) | - |
Sound Performance - Tier 4 Final / Stage V - Standard |
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| 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 |
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| 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 |
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| 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 |
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| 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 | - | - |
Buckets |
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| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) | 3.0-5.0 m3 (3.9-6.5 yd3) | - |
Weights |
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| Operating Weight | - | 41794 lb | - |
| Operating Weight (1) | - | 17 258 kg (38,046 lb)** | - |
| Operating Weight (2) | - | 18 958 kg (41,794 lb)^ | - |
| Note (2) | - | ^Dimensions listed are for a machine configured with standard counterweights, waste guarding, rear waste gate, 80 kg (176 lb) operator, and new solid tires. | - |
| Note (1) | - | **Dimensions listed are for a machine configured with optional counterweights, waste guarding, 80 kg (176 lb) operator, and Michelin 20.5 R25 XMINE D2 tires. | - |
Cab |
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| ROPS | - | ISO 3471:2008 | - |
| FOPS | - | ISO 3449:2005 LEVEL II | - |
| Declared Sound Levels - Exterior Sound Power Level (ISO 6395:2008)* | - | 101 dB(A) | - |
| Note (1) | - | * Measurements were conducted at 70% of maximum engine cooling fan speed. Sound level may vary at different engine cooling fan speeds. The cab was properly installed and maintained. The measurements were conducted with the cab doors and the cab windows cl | - |
| Declared Sound Levels - Operator Sound Pressure Level (ISO 6396:2008)* | - | 68 dB(A) | - |
Loader Hydraulic System |
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| Maximum Flow - Implement Pump - 4th Function Maximum Flow* | - | 42 gal/min | - |
| Relief Pressure - Tilt Cylinder - 3rd and 4th Function Relief Pressure | - | 4351 psi | - |
| Relief Pressure - Tilt Cylinder | - | 4351 psi | - |
| Relief Pressure - Tilt Cylinder - 3rd and 4th Function Maximum Working Pressure | - | 4061 psi | - |
| Note (1) | - | Implement system uses a dedicated load sensing variable displacement pump with dual double acting lift cylinders and a single double acting tilt cylinder. | - |
| Maximum Flow - Implement Pump | - | 50 gal/min | - |
| Cycle Times - Performance (HP+) at 1,800 rpm/Standard Power Mode at 1,600 rpm - Raise (Ground Level to Maximum Lift) | - | 5.5/6.2 seconds | - |
| Note (2) | - | Flow values listed are for a machine running in Performance Power Mode (1,800 rpm). | - |
| Cycle Times - Performance (HP+) at 1,800 rpm/Standard Power Mode at 1,600 rpm - Total Cycle Time | - | 9.7/10.6 seconds | - |
| Maximum Working Pressure - Implement Pump | - | 4061 psi | - |
| Note (3) | - | * 3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the touch screen display when equipped. | - |
| Cycle Times - Performance (HP+) at 1,800 rpm/Standard Power Mode at 1,600 rpm - Float Down (Maximum Lift to Ground Level) | - | 2.7/2.7 seconds | - |
| Cycle Times - Performance (HP+) at 1,800 rpm/Standard Power Mode at 1,600 rpm - Dump (at Maximum Lift Height) | - | 1.5/1.7 seconds | - |
| Maximum Flow - Implement Pump - 3rd Function Maximum Flow* | - | 50 gal/min | - |
| Lift Cylinder: Standard Lift Linkage - Stroke | - | 31.1 in | - |
| Tilt Cylinder: Standard Lift Linkage - Rod Diameter | - | 3.5 in | - |
| Lift Cylinder: Standard Lift Linkage - Rod Diameter | - | 2.6 in | - |
| Tilt Cylinder: Standard Lift Linkage - Bore Diameter | - | 5.9 in | - |
| Lift Cylinder: Standard Lift Linkage - Bore Diameter | - | 4.7 in | - |
| Tilt Cylinder: Standard Lift Linkage - Stroke | - | 21.9 in | - |
Steering |
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| Maximum Steering Torque - 0° (Straight Machine) | - | 42506 ft·lbf | - |
| Maximum Steering Torque - 40° (Full Turn) | - | 31398 ft·lbf | - |
| Maximum Working Pressure - Steering Pump | - | 3500 psi | - |
| Steering Cycle Times - Full Left to Full Right - Maximum RPM: 90 rpm Steering Wheel Speed | - | 2.3 s | - |
| Steering Cylinder, Double Acting - Bore Diameter | - | 3.1 in | - |
| Steering Cylinder, Double Acting - Stroke | - | 15.7 in | - |
| Steering Cycle Times - Full Left to Full Right - Minimum RPM: Pump Flow Limited | - | 3.1 s | - |
| Note (1) | - | Steering system uses a dedicated load sensing variable displacement pump with dual double acting cylinders. | - |
| Steering Cylinder, Double Acting - Rod Diameter | - | 2 in | - |
| Maximum Flow - Steering Pump | - | 34 gal/min | - |
| Note (2) | - | Flow values listed are for a machine running in Performance Power Mode (1,800 rpm). | - |
Power Train |
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| Front Axle - Traction Aid | - | Locking differential | - |
| Note (1) | - | Power train is governed by the Caterpillar exclusive Intelligent Power Management system to deliver peak performance and efficiency. | - |
| Rear Axle | - | Oscillating | - |
| Note (3) | - | Differential front locking axle can be engaged on the go at full torque up to 20 km/h (12.4 mph) on the 938M. | - |
| Rear Axle - Oscillation Angle by Tire Size - 20.5 R25, 550/65, 600/65, 650/65 | - | ± 10.5 degrees | - |
| Rear Axle - Traction Aid - Optional | - | Limited slip differential | - |
| Rear Axle - Oscillation Angle by Tire Size - 23.5 R25 | - | ± 7 degrees | - |
| Brakes - Service | - | Inboard wet disc | - |
| Note (2) | - | Offset rims available to meet European roading requirements. | - |
| Brakes - Parking | - | Spring applied hydraulically released | - |
| Front Axle | - | Fixed | - |
| Rear Axle - Oscillation Angle by Tire Size - Solid Tires, 750/65, 620/65, Skidder | - | ± 7 degrees | - |
Sustainability |
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| Recyclability | - | 94% | - |
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