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 938M Small Wheel Loader |
 988 GC Wheel Loader |
 990 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® C15 | C27 Cat® |
| 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 | - | - |
| Rated Speed | - | 2000 | 1,800/min |
| Peak Power Speed | - | 1600 | - |
| Engine Power - ISO 14396 | - | 449 HP | 752 HP |
| Gross Power - SAE J1995 | - | 456 HP | 766 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 and EU Stage V emission standards or U.S. EPA Tier 2 and EU Stage II equivalent |
| Bore | - | 5.4 in | 5.4 in |
| Stroke | - | 6.75 in | 6 in |
| Displacement | - | 927 in³ | 1649.5 in³ |
| Peak Torque - 1,200 rpm - SAE J1995 | - | 1778 ft·lbf | - |
| Torque Rise | - | 16% | 18 % |
| Net Power - SAE J1349 - Standard Ambient | - | - | 699 HP |
| Net Power - SAE J1349 - High Ambient | - | - | 648 HP |
| Peak Torque - 1,200 rpm | - | - | 2624 lb/ft |
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) | 6.4-7.6 m3 (8.3-10 yd3) | 8.6 m³ – 10.0 m³ (11.25 yd³ – 13.0 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% | 96% | - |
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) | 9 gal (US) | 20 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. | 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 |
| Hydraulic Tank | 23.8 gal (US) | - | - |
| Fuel Tank | 51.5 gal (US) | 141 gal (US) | 294.3 gal (US) |
| Cooling System | 7.9 gal (US) | 27 gal (US) | 54.9 gal (US) |
| Diesel Exhaust Fluid Tank | - | 5.5 gal (US) | - |
| Transmission | - | 20 gal (US) | 29.1 gal (US) |
| Differential - Final Drives - Front | - | 49 gal (US) | 71.6 gal (US) |
| Differential - Final Drives - Rear | - | 45 gal (US) | 68.9 gal (US) |
| 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) |
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). | - | Travel speeds based on Michelin 45/65R39 LD D2**L5 tires. |
| 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 power shift | Cat planetary power shift |
| 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 |
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 | Trunnion |
| Front | Fixed; Locking differential (standard) | Fixed | Fixed |
| Oscillation Angle | - | +/-12.5° | 8.5° |
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. | 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). |
Operating Specifications |
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| Operating Weight | - | 116858 lb | 178517 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) |
| 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 |
Hydraulic System - Lift/Tilt |
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| Lift/Tilt System - Circuit | - | EH - Load Sense | Positive flow control |
| 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 |
| 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 | - |
| Maximum Flow at 1,800 rpm (1) | - | - | 240 gal/min |
| Relief Valve Setting - Main | - | - | 507 psi |
Hydraulic Cycle Times |
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| Rack Back | - | 3.8 s | 4.3 s |
| Raise | - | 7.5 s | 8.2 s |
| Dump | - | 3 s | 2.9 s |
| Lower Float Down | - | 4.6 s | 3.6 s |
| Total Hydraulic Cycle Time - Empty Bucket | - | 18.9 s | 13.8 s |
| Lower | - | - | 3.7 s |
Hydraulic System - Steering |
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| Steering System - Circuit | - | Pilot, load sensing | Pilot, load sensing |
| Steering System - Pump | - | Piston, variable displacement | Piston, variable displacement |
| Maximum Flow | - | 52 gal (US) | - |
| Relief Valve Setting - Steering | - | 4000 psi | 5004 psi |
| Total Steering Angle | - | 70° | 70° |
| Steering Cycle Times - High Idle | - | 3 s | - |
| Steering Cycle Times - Low Idle | - | 5.2 s | - |
| Maximum Flow at 1,400 rpm | - | - | 96.2 gal/min |
Brakes |
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| Brakes | - | ISO 3450:2011 | 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/EU Stage V - Standard |
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| 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 |
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| 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. | - |
Sound Performance - Standard |
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| Operator Sound Level (ISO 6396:2008) | - | - | 65.5 dB(A) |
| Machine Sound Level (ISO 6395:2008) | - | - | 115 dB(A) |
Sound Performance - Suppression |
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| Operator Sound Level (ISO 6396:2008) | - | - | 65.5 dB(A) |
| Machine Sound Level (ISO 6395:2008) | - | - | 113 dB(A) |
