CAT 938M Wheel Loader

Engine Details

Displacement 427 cu in (7 L)
Bore 4 in (101.6 mm)
Stroke 5 in (127 mm)
Emissions Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Engine Model Cat C7.1 ACERT
Note (1) * Range 4 power and torque is equal to Performance Mode with CAT Power by Range technology.
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.
Note (3) No derating required up to 3000 m (10,000 ft) altitude. Auto derate protects hydraulic and transmission systems.
Note (4) Spark arrestor performance as standard Meets performance requirements of EN 1834-1.2000 (section 6.4.2 Visual Test).
Maximum Gross Power 188 hp (140.2 kw)
Rated Net Power 182 hp (135.8 kw)
Maximum Rated Gross Power – Iso 14396 (Din) 190 hp (141.7 kw)
Maximum Rated Gross Power – Maximum Engine Speed (Performance Power Mode: Range 1-4) 1800 rpm
Maximum Rated Gross Power – Iso 14396 188 hp (140.2 kw)
Maximum Rated Gross Power – Iso 14396 (Performance Power Mode: Range 1-4) 188 hp (140.2 kw)
Maximum Rated Gross Power – Iso 14396 (Din) (Performance Power Mode: Range 1-4) 190 hp (141.7 kw)
Rated Net Power – 1,800 Rpm – Sae J1349 At Minimum Fan Speed (Performance Power Mode: Range 1-4) 182 hp (135.8 kw)
Rated Net Power – 1,800 Rpm – Iso 9249 (1977)/Eec 80/1269 At Minimum Fan Speed (Performance Power Mode: Range 1-4) 184 hp (137.3 kw)
Rated Net Power – 1,800 Rpm – Iso 9249 (Din) At Minimum Fan Speed (Performance Power Mode: Range 1-4) 186 hp (138.8 kw)
Maximum Gross Torque – Iso 14396 (Performance Power Mode: Range 1-4) 648 lb ft (878.6 Nm)
Maximum Net Torque – Sae J1349 (Performance Power Mode: Range 1-4) 621 lb ft (842 Nm)
Maximum Net Torque – Iso 9249 (1977)/Eec 80/1269 (Performance Power Mode: Range 1-4) 628 lb ft (851.5 Nm)
Maximum Rated Gross Power – Maximum Engine Speed (Standard Power Mode: Range 1-3*) 1600 rpm
Maximum Rated Gross Power – Iso 14396 (Standard Power Mode: Range 1-3*) 173 hp (129.1 kw)
Maximum Rated Gross Power – Iso 14396 (Din) (Standard Power Mode: Range 1-3*) 175 hp (130.5 kw)
Rated Net Power – 1,600 Rpm – Sae J1349 At Minimum Fan Speed (Standard Power Mode: Range 1-3*) 168 hp (125.3 kw)
Rated Net Power – 1,600 Rpm – Iso 9249 (1977)/Eec 80/1269 At Minimum Fan Speed (Standard Power Mode: Range 1-3*) 169 hp (126.1 kw)
Rated Net Power – 1,600 Rpm – Iso 9249 (Din) At Minimum Fan Speed (Standard Power Mode: Range 1-3*) 171 hp (127.6 kw)
Maximum Gross Torque – Iso 14396 (Standard Power Mode: Range 1-3*) 648 lb ft (878.6 Nm)
Maximum Net Torque – Sae J1349 (Standard Power Mode: Range 1-3*) 621 lb ft (842 Nm)
Maximum Net Torque – Iso 9249 (1977)/Eec 80/1269 (Standard Power Mode: Range 1-3*) 628 lb ft (851.5 Nm)

Operational Specs

Operating Weight 36216 lb (16427.4 kg)

Power Train

Front Axle Fixed
Rear Axle Oscillating
Front Axle – Traction Aid – Standard Locking differential
Rear Axle – Oscillation Angle By Tire Size – 23.5 R25 7 degrees
Rear Axle – Traction Aid – Optional Limited slip differential
Note (1) Power train is governed by the CAT exclusive Intelligent Power Management system to deliver peak performance and efficiency.
Note (2) Differential front locking axle can be engaged on the go at full torque up to 20 km/h (12.4 mph) on the 938M.
Note (3) Offset rims available to meet European roading requirements.
Brakes – Parking Spring applied hydraulically released
Brakes – Service Outboard wet disc
Rear Axle – Oscillation Angle By Tire Size – 20.5 R25, 550/65, 600/65, 650/65 10.5 degrees
Rear Axle – Oscillation Angle By Tire Size – Solid Tires, 750/65, 620/65, Skidder 7 degrees

Transmission

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).

Steering

Maximum Working Pressure – Steering Pump 3500 psi
Steering Cylinder, Double Acting – Bore Diameter 3.1 in (78.8 mm)
Steering Cylinder, Double Acting – Rod Diameter 2 in (50.8 mm)
Steering Cylinder, Double Acting – Stroke 15.7 in (398.8 mm)
Maximum Steering Torque – 0 Degrees (Straight Machine) 42506 lb ft (57630.4 Nm)
Maximum Flow – Steering Pump 34 gal/min
Maximum Steering Torque – 40 Degrees (Full Turn) 31398 lb ft (42570 Nm)
Steering Cycle Times – Full Left To Full Right – Minimum Rpm: Pump Flow Limited 3.1 s
Steering Cycle Times – Full Left To Full Right – Maximum Rpm: 90 Rpm Steering Wheel Speed 2.3 s
Note (1) Steering system uses a dedicated load sensing variable displacement pump with dual double acting cylinders.
Note (2) Flow values listed are for a machine running in Performance Power Mode (1,800 rpm).

Transmission

Forward And Reverse – Range 1* 1-13 km/h (0.6-8 mph)
Forward And Reverse – Range 2 8 mph (12.9 km/h)
Forward And Reverse – Range 3 17 mph (27.4 km/h)
Forward And Reverse – Range 4 25 mph (40.3 km/h)

Buckets

Bucket Capacities 2.5-5.0 m3 (3.3-6.5 yd3)

Operating Specifications

Full Turn Tip Load 22107 lb (10027.6 kg)

Service Refill Capacities

Cooling System 8.5 gal (32.2 L)
Fuel Tank Capacity 51.5 gal (195 L)
Hydraulic Tank 23.8 gal (90.1 L)
Hydraulic System – Including Tank 44.9 gal (170 L)
Engine Crankcase 5.3 gal (20.1 L)
Transmission – Gear Box 2.9 gal (11 L)
Diesel Exhaust Fluid (Def) Tank 5 gal (19 L)
Front Axles 9.2 gal (34.9 L)
Rear Axles 9.2 gal (34.9 L)

Cab

ROPS ISO 3471: 2008
FOPS ISO 3449: 2005 LEVEL II
Note (1) Declared sound levels per ISO 6396:2008* while in Performance Power Mode: Standard cab: 68 3 dB(A) and Deluxe cab
Note (2) * Measurements were conducted with cab doors and windows closed and at 70% of maximum engine cooling fan speed. Sound level may vary at different engine cooling fan speeds.

Loader Hydraulic System

Lift Cylinder, Double Acting – Stroke 31.1 in (790 mm)
Tilt Cylinder, Double Acting – Stroke 21.9 in (556.3 mm)
Maximum Flow – Implement Pump 50 gal/min
Note (1) * 3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display when equipped.
Note (2) Implement system uses a dedicated load sensing variable displacement pump with dual double acting lift cylinders and a single double acting tilt cylinder.
Note (3) Flow values listed are for a machine running in Performance Power Mode (1,800 rpm).
Maximum Working Pressure – Implement Pump 4061 psi
Lift Cylinder, Double Acting – Bore Diameter 4.7 in (119.4 mm)
Lift Cylinder, Double Acting – Rod Diameter 2.6 in (66.1 mm)
Tilt Cylinder, Double Acting – Bore Diameter 5.9 in (149.9 mm)
Tilt Cylinder, Double Acting – Rod Diameter 3.5 in (88.9 mm)
Relief Pressure – Tilt Cylinder 4351 psi
Maximum Flow – Implement Pump – 3rd Function* 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
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
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 – Total Cycle Time 9.7/10.6 seconds
Maximum Flow – Implement Pump – 4th Function Maximum Flow* 42 gal/min
Relief Pressure – Tilt Cylinder – 3rd And 4th Function Maximum Working Pressure 4061 psi
Relief Pressure – Tilt Cylinder – 3rd And 4th Function Relief Pressure 4351 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 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes.
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