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938M Wheel Loader

938M Wheel Loader

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The Cat 938M Small Wheel Loader sets the standard for productivity, fuel efficiency and operator comfort. The improved optimized Z-bar loader linkage delivers the quick loading performance of a traditional Z-bar with the parallelism and load handling capability of a tool carrier. A high torque, low speed C7.1 ACERT engine works in concert with an intelligent hystat power train to deliver fuel efficiency as standard. Meets Tier 4 Final/Stage IV emission standards with an environmentally friendly, Clean Emission Module designed to manage itself so you can concentrate on your work. Experience the new industry benchmark.

Engine

Maximum Rated Gross Power: ISO 14396
188 hp
Rated Net Power
182 hp
Maximum Rated Gross Power: ISO 14396 (DIN)
190 hp
Maximum Rated Gross Power – Maximum Engine Speed (Performance Power Mode: Range 1-4)
1800 rpm
Maximum Rated Gross Power – ISO 14396 (Performance Power Mode: Range 1-4)
188 hp
Maximum Rated Gross Power – ISO 14396 (DIN) (Performance Power Mode: Range 1-4)
190 hp
Rated Net Power at 1,800 rpm – SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
182 hp
Engine Model
Cat® C7.1 ACERT™
Rated Net Power at 1,800 rpm – ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
184 hp
Maximum Gross Power
188 hp
Bore
4 in
Stroke
5 in
Displacement
427 in3
Rated Net Power at 1,800 rpm – ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4)
186 hp
Maximum Gross Torque – ISO 14396 (Performance Power Mode: Range 1-4)
648 lbf-ft
Maximum Net Torque – SAE J1349 (Performance Power Mode: Range 1-4)
621 lbf-ft
Maximum Net Torque – ISO 9249 (1977)/EEC 80/1269 (Performance Power Mode: Range 1-4)
628 lbf-ft
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
Maximum Rated Gross Power – ISO 14396 (DIN) (Standard Power Mode: Range 1-3*)
175 hp
Rated Net Power at 1,600 rpm – SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
168 hp
Rated Net Power at 1,600 rpm – ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
169 hp
Rated Net Power at 1,600 rpm – ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
171 hp
Maximum Gross Torque – ISO 14396 (Standard Power Mode: Range 1-3*)
648 lbf-ft
Maximum Net Torque – SAE J1349 (Standard Power Mode: Range 1-3*)
621 lbf-ft
Maximum Net Torque – ISO 9249 (1977)/EEC 80/1269 (Standard Power Mode: Range 1-3*)
628 lbf-ft
Emissions
Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Note
* Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology.
Note
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
No derating required up to 3000 m (10,000 ft) altitude. Auto derate protects hydraulic and transmission systems.
Note
Spark arrestor performance as standard – Meets performance requirements of EN 1834-1.2000 (section 6.4.2 Visual Test).

Buckets

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

Weights

Operating Weight
36216 lb

Cab

ROPS
ISO 3471: 2008
FOPS
ISO 3449: 2005 LEVEL II
Note
Declared sound levels per ISO 6396:2008* while in Performance Power Mode: – Standard cab: 68 ±3 dB(A) and Deluxe cab
Note
* 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.

Steering

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

Loader Hydraulic System

Maximum Flow – Implement Pump
50 gal/min
Maximum Flow – Implement Pump: 3rd Function Maximum Flow*
50 gal/min
Maximum Flow – Implement Pump: 4th Function Maximum Flow*
42 gal/min
Maximum Working Pressure – Implement Pump
4061 psi
Relief Pressure – Tilt Cylinder
4351 psi
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
Lift Cylinder: Double Acting – Bore Diameter
4.7 in
Lift Cylinder: Double Acting – Rod Diameter
2.6 in
Lift Cylinder: Double Acting – Stroke
31.1 in
Tilt Cylinder: Double Acting – Bore Diameter
5.9 in
Tilt Cylinder: Double Acting – Rod Diameter
3.5 in
Tilt Cylinder: Double Acting – Stroke
21.9 in
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
Note
* 3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display when equipped.
Note
Implement system uses a dedicated load sensing variable displacement pump with dual double acting lift cylinders and a single double acting tilt cylinder.
Note
Flow values listed are for a machine running in Performance Power Mode (1,800 rpm).

Service Refill Capacities

Fuel Tank
51.5 gal
Cooling System
8.5 gal
Engine Crankcase
5.3 gal
Transmission (Gear Box)
2.9 gal
Front Axles
9.2 gal
Rear Axles
9.2 gal
Hydraulic System (Including Tank)
44.9 gal
Hydraulic Tank
23.8 gal
Diesel Exhaust Fluid (DEF) Tank
5.0 gal

Transmission

Forward and Reverse: Range 1*
1-13 km/h (0.6-8 mph)
Forward and Reverse: Range 2
8 mph
Forward and Reverse: Range 3
17 mph
Forward and Reverse: Range 4
25 mph
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).

Operating Specifications

Full Turn Tip Load
22107 lb

Power Train

Front Axle
Fixed
Front Axle: Traction Aid (standard)
Locking differential
Rear Axle
Oscillating
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 – 23.5 R25
± 7 degrees
Rear Axle: Oscillation Angle by Tire Size – Solid Tires, 750/65, 620/65, Skidder
± 7 degrees
Rear Axle: Traction Aid (optional)
Limited slip differential
Brakes: Service
Outboard wet disc
Brakes: Park
Spring applied hydraulically released
Note
Power train is governed by the Caterpillar exclusive Intelligent Power Management system to deliver peak performance and efficiency.
Note
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
Offset rims available to meet European roading requirements.

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.