Caterpillar 938M Wheel Loader
Specifications
Engine
Displacement
427cu in
Bore
4in
Stroke
5in
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 Caterpillar 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
188hp
Rated Net Power
182hp
Maximum Rated Gross Power - Iso 14396 (Din)
190hp
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4)
1800rpm
Maximum Rated Gross Power - Iso 14396
188hp
Maximum Rated Gross Power - Iso 14396 (Performance Power Mode: Range 1-4)
188hp
Maximum Rated Gross Power - Iso 14396 (Din) (Performance Power Mode: Range 1-4)
190hp
Rated Net Power - 1,800 Rpm - Sae J1349 At Minimum Fan Speed (Performance Power Mode: Range 1-4)
182hp
Rated Net Power - 1,800 Rpm - Iso 9249 (1977)/Eec 80/1269 At Minimum Fan Speed (Performance Power Mode: Range 1-4)
184hp
Rated Net Power - 1,800 Rpm - Iso 9249 (Din) At Minimum Fan Speed (Performance Power Mode: Range 1-4)
186hp
Maximum Gross Torque - Iso 14396 (Performance Power Mode: Range 1-4)
648lb ft
Maximum Net Torque - Sae J1349 (Performance Power Mode: Range 1-4)
621lb ft
Maximum Net Torque - Iso 9249 (1977)/Eec 80/1269 (Performance Power Mode: Range 1-4)
628lb ft
Maximum Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*)
1600rpm
Maximum Rated Gross Power - Iso 14396 (Standard Power Mode: Range 1-3*)
173hp
Maximum Rated Gross Power - Iso 14396 (Din) (Standard Power Mode: Range 1-3*)
175hp
Rated Net Power - 1,600 Rpm - Sae J1349 At Minimum Fan Speed (Standard Power Mode: Range 1-3*)
168hp
Rated Net Power - 1,600 Rpm - Iso 9249 (1977)/Eec 80/1269 At Minimum Fan Speed (Standard Power Mode: Range 1-3*)
169hp
Rated Net Power - 1,600 Rpm - Iso 9249 (Din) At Minimum Fan Speed (Standard Power Mode: Range 1-3*)
171hp
Maximum Gross Torque - Iso 14396 (Standard Power Mode: Range 1-3*)
648lb ft
Maximum Net Torque - Sae J1349 (Standard Power Mode: Range 1-3*)
621lb ft
Maximum Net Torque - Iso 9249 (1977)/Eec 80/1269 (Standard Power Mode: Range 1-3*)
628lb ft
Operational
Operating Weight
36216lb
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 Caterpillar 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
3.1in
Steering Cylinder, Double Acting - Rod Diameter
2in
Steering Cylinder, Double Acting - Stroke
15.7in
Maximum Steering Torque - 0 Degrees (Straight Machine)
42506lb ft
Maximum Flow - Steering Pump
34 gal/min
Maximum Steering Torque - 40 Degrees (Full Turn)
31398lb ft
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
8mph
Forward And Reverse - Range 3
17mph
Forward And Reverse - Range 4
25mph
Buckets
Bucket Capacities
2.5-5.0 m3 (3.3-6.5 yd3)
Operating Specifications
Full Turn Tip Load
22107lb
Service Refill Capacities
Cooling System
8.5gal
Fuel Tank
51.5gal
Hydraulic Tank
23.8gal
Hydraulic System - Including Tank
44.9gal
Engine Crankcase
5.3gal
Transmission - Gear Box
2.9gal
Diesel Exhaust Fluid (Def) Tank
5gal
Front Axles
9.2gal
Rear Axles
9.2gal
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
31.1in
Tilt Cylinder, Double Acting - Stroke
21.9in
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
4.7in
Lift Cylinder, Double Acting - Rod Diameter
2.6in
Tilt Cylinder, Double Acting - Bore Diameter
5.9in
Tilt Cylinder, Double Acting - Rod Diameter
3.5in
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.
