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 938M Small Wheel Loader |
 988 Wheel Loader |
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Engine |
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| Maximum Gross Power | 188 HP | - | - |
| Displacement (Standard Power Mode: Speed Range 1-3*) | 427 in³ | - | - |
| Maximum Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*) | 1600 r/min | - | - |
| Rated Net Power - 1,800 rpm - SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4) | 183 HP | - | - |
| Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*) | 642 ft·lbf | - | - |
| Maximum Gross Power - 1,600 rpm - ISO 14396 (DIN) (Standard Power Mode: Range 1-3*) | 176 mhp | - | - |
| Maximum Net Torque - SAE J1349 (Performance Power Mode: Range 1-4) | 649 ft·lbf | - | - |
| Maximum Gross Power - 1,800 rpm - ISO 14396 (Performance Power Mode: Range 1-4) | 188 HP | - | - |
| Rated Net Power - 1,600 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | 172 mhp | - | - |
| Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*) | 627 ft·lbf | - | - |
| Rated Net Power - 1,800 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4) | 186 mhp | - | - |
| Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4) | 1800 r/min | - | - |
| Maximum Gross Torque - ISO 14396 (Performance Power Mode: Range 1-4) | 664 ft·lbf | - | - |
| Displacement (Performance Power Mode: Speed Range 1-4) | 427 in³ | - | - |
| Maximum Gross Power - 1,800 rpm - ISO 14396 (DIN) (Performance Power Mode: Range 1-4) | 190 mhp | - | - |
| Note (1) | 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. | - | - |
| Engine Model | Cat C7.1 ACERT** | Cat® C18 ™ | - |
| Rated Net Power - 1,600 rpm - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | 170 HP | - | - |
| Maximum Gross Power - 1,600 rpm - ISO 14396 (Standard Power Mode: Range 1-3*) | 173 HP | - | - |
| Note (2) | *Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology. | - | - |
| Note (3) | **The Cat C7.1 ACERT engine meets Tier 4 Final/Stage V off-highway emission standards. | - | - |
| Rated Net Power - 1,600 rpm - ISO 9249 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) | 170 HP | - | - |
| Maximum Net Torque - ISO 9249:2007 (Standard Power Mode: Range 1-3*) | 628 ft·lbf | - | - |
| Rated Net Power - 1,800 rpm - ISO 9249 at Minimum Fan Speed (Performance Power Mode: Range 1-4) | 184 HP | - | - |
| Maximum Net Torque - ISO 9249:2007 (Performance Power Mode: Range 1-4) | 650 ft·lbf | - | - |
| Net Power - SAE J1349:2011 | - | 541 HP | - |
| Engine Power - ISO 14396:2002 | - | 580 HP | - |
| Gross Power - SAE J1995:2014 | - | 588 HP | - |
| 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 | - |
| Bore | - | 5.7 in | - |
| Stroke | - | 7.2 in | - |
| Displacement | - | 1105 in³ | - |
| Peak Torque - 1,200 rpm | - | 2230 lb/ft | - |
| Torque Rise | - | 58 % | - |
Weights |
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| Operating Weight | 35778 lb | - | - |
Buckets |
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| Bucket Capacities | 2.5-5.0 m3 (3.2-6.5 yd3) | 4.7-13 m3 (6.2-17 yd3) | - |
| Bucket Capacities - Light Material | 3.1-5.0 m³ (4.0-6.5 yd³) | - | - |
| Bucket Capacities - General Purpose | 2.5-3.2 m³ (3.2-4.2 yd³) | - | - |
Cab |
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| ROPS | ISO 3471:2008 | - | - |
| FOPS | ISO 3449:2008 Level II | - | - |
| Note (3) | *The measurements were conducted with the cab doors and windows closed and at 70% of the maximum engine cooling fan speed. The sound level may vary at different engine cooling fan speeds. | - | - |
| Note (1) | Cab and Rollover Protective Structures (ROPS) are standard in North America and Europe. | - | - |
| Note (2) | The declared dynamic operator sound pressure levels per ISO 6396:2008*, when properly installed and maintained, are: – Standard cab: 68 ±3 dB(A) – Deluxe cab: 66 ±2 dB(A) |
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Sustainability |
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| Recyclability | 94% | - | - |
Sound |
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| Average Exterior Sound Pressure (ISO 6395:2008) | 101 dB(A) | - | - |
| Operator Sound Pressure (ISO 6396:2008) | 72 dB(A) | - | - |
| Note (1) | European Union Directive “2000/14/EC” | - | - |
Service Refill Capacities |
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| Transmission - Gear Box | 2.9 gal (US) | - | - |
| Engine Crankcase | 5.3 gal (US) | - | - |
| Hydraulic System - Including Tank | 44.9 gal (US) | - | - |
| Rear Axles | 9.2 gal (US) | - | - |
| Front Axles | 9.2 gal (US) | - | - |
| Diesel Exhaust Fluid (DEF) Tank | 5 gal (US) | - | - |
| Note | DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1. | - | - |
| Hydraulic Tank | 23.8 gal (US) | - | - |
| Fuel Tank | 51.5 gal (US) | 188 gal (US) | - |
| Cooling System | 7.9 gal (US) | 31.7 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) | - |
Loader Hydraulic System |
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| Note (1) | *3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display, when equipped. | - | - |
| Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Raise, Ground Level to Maximum Lift | 5.5 s | - | - |
| Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Total Cycle Time | 9.7 s | - | - |
| Relief Pressure - Tilt Cylinder | 4351 psi | - | - |
| Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Total Cycle Time | 10.6 s | - | - |
| Maximum Working Pressure - Implement Pump | 4061 psi | - | - |
| Relief Pressure - Tilt Cylinder - 3rd and 4th Function Maximum Working Pressure | 4061 psi | - | - |
| Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Dump, at Maximum Lift Height | 1.7 s | - | - |
| Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Dump, at Maximum Lift Height | 1.5 s | - | - |
| Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Raise, Ground Level to Maximum Lift | 6.2 s | - | - |
| Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Float Down, Maximum Lift to Ground Level | 2.7 s | - | - |
| Maximum Flow - Implement Pump - 4th Function Maximum Flow* | 42 gal/min | - | - |
| Relief Pressure - Tilt Cylinder - 3rd and 4th Function Relief Pressure | 4351 psi | - | - |
| Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Float Down, Maximum Lift to Ground Level | 2.7 s | - | - |
| Maximum Flow - Implement Pump | 50 gal/min | - | - |
| Maximum Flow - Implement Pump - 3rd Function Maximum Flow* | 50 gal/min | - | - |
Steering |
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| Maximum Working Pressure - Steering Pump | 3500 psi | - | - |
| Steering Articulation Angle - Each Direction | 40° | - | - |
| Maximum Flow - Steering Pump | 34 gal/min | - | - |
| Number of Steering Wheel Turns - Full Left to Full Right or Full Right to Full Left | 3.3 turns | - | - |
| Maximum Steering Torque - 0° (Straight Machine) | 42506 ft·lbf | - | - |
| Maximum Steering Torque - 40° (Full Turn) | 31398 ft·lbf | - | - |
| Steering Cycle Times - Full Left to Full Right - At 1,800 rpm: 90 rpm Steering Wheel Speed | 2.3 s | - | - |
Transmission |
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| Forward and Reverse - Range 3 | 17 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 secondary display, when equipped. Factory default is 7 km/h (4.4 mph). | - | - |
| Forward and Reverse - Range 1* | 1-13 km/h (0.6-8 mph) | - | - |
| Forward and Reverse - Range 2 | 8 mile/h | - | - |
| 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 | - |
Tires |
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| Note (1) | Other tire choices are available. Contact your Cat dealer for details. | - | - |
| Standard Size | 20.5 R25, radial (L-3) | - | - |
| Note (2) | In certain applications, the loader’s productive capabilities may exceed the tire’s tonnes-km/h (ton-mph) capabilities. | - | - |
| Other Choices Include | 20.5 R25, radial (L-2); 20.5 R25, radial (L-5); 20.5-25 12PR (L-2); 20.5-25 12PR (L-3); 20.5-25 16PR (L-5); 23.5 R25, radial (L-3); 650/65 R25 radial (L-3); Skidder/Agriculture; Solid Tires | - | - |
| Note (3) | Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model. | - | - |
Axles |
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| Rear | Oscillating ±11 degrees; Open differential (standard); Limited slip differential (optional) | Trunnion | - |
| Front | Fixed; Locking differential (standard) | Fixed | - |
| Oscillation Angle | - | 13 ° | - |
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 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes. | 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. | - |
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 | - |
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 | - |
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 | - |
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 | - |
