US
Metric

Overview

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 engine works in concert with an intelligent hystat power train to deliver fuel efficiency as standard. Meets U.S. EPA Tier 4 Final/EU 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

Rated Net Power
182.00 HP
136.00 kW
Engine Model
Cat® C7.1 ACERT™
Maximum Rated Gross Power - ISO 14396
188.00 HP
140.00 kW
Maximum Rated Gross Power - ISO 14396 (DIN)
190.00 HP
140.00 kW
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4)
1800.00 r/min
1800.00 r/min
Maximum Rated Gross Power - ISO 14396 (Performance Power Mode: Range 1-4)
188.00 HP
140.00 kW
Maximum Rated Gross Power - ISO 14396 (DIN) (Performance Power Mode: Range 1-4)
190.00 HP
142.00 kW
Rated Net Power - 1,800 rpm - SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
183.00 HP
137.00 kW
Rated Net Power - 1,800 rpm - ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
184.00 HP
137.00 kW
Rated Net Power - 1,800 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4)
186.00 HP
139.00 kW
Maximum Gross Torque - ISO 14396 (Performance Power Mode: Range 1-4)
664.00 ft·lbf
900.00 N·m
Maximum Net Torque - SAE J1349 (Performance Power Mode: Range 1-4)
649.00 ft·lbf
880.00 N·m
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Performance Power Mode: Range 1-4)
628.00 lb/ft
852.00 N·m
Maximum Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*)
1600.00 r/min
1600.00 r/min
Maximum Rated Gross Power - ISO 14396 (Standard Power Mode: Range 1-3*)
173.00 HP
129.00 kW
Maximum Rated Gross Power - ISO 14396 (DIN) (Standard Power Mode: Range 1-3*)
176.00 HP
131.00 kW
Rated Net Power - 1,600 rpm - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
170.00 HP
127.00 kW
Rated Net Power - 1,600 rpm - ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
169.00 HP
126.00 kW
Rated Net Power - 1,600 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
172.00 HP
128.00 kW
Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*)
642.00 ft·lbf
870.00 N·m
Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*)
627.00 ft·lbf
850.00 N·m
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Standard Power Mode: Range 1-3*)
628.00 lb/ft
852.00 N·m
Displacement
427.00 in3
7.01 L
Bore
4.00 in
105.00 mm

Weights

Operating Weight
36216.00 lb
16427.00 kg

Buckets

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

Steering

Steering Cylinder: Double Acting – Bore Diameter
3.10 in
80.00 mm
Steering Cylinder: Double Acting – Rod Diameter
2.00 in
50.00 mm
Steering Cylinder: Double Acting – Stroke
15.70 in
399.00 mm
Maximum Flow – Steering Pump
34.00 gal/min
130.00 L/min
Maximum Working Pressure – Steering Pump
3500.00 psi
24130.00 kPa
Maximum Steering Torque – 0° (Straight Machine)
42506.00 lbf-ft
57630.00 N·m
Maximum Steering Torque - 40° (Full Turn)
31398.00 ft·lbf
42570.00 N·m

Loader Hydraulic System

Maximum Flow – Implement Pump
50.00 gal/min
190.00 L/min
Maximum Flow - Implement Pump - 3rd Function*
50.00 gal/min
190.00 l/min
Maximum Flow - Implement Pump - 4th Function Maximum Flow*
42.00 gal/min
160.00 l/min
Maximum Working Pressure – Implement Pump
4061.00 psi
28000.00 kPa
Relief Pressure – Tilt Cylinder
4351.00 psi
30000.00 kPa
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Maximum Working Pressure
4061.00 psi
28000.00 kPa
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Relief Pressure
4351.00 psi
30000.00 kPa
Lift Cylinder: Double Acting – Bore Diameter
4.70 in
120.00 mm
Lift Cylinder: Double Acting – Rod Diameter
2.60 in
65.00 mm
Lift Cylinder: Double Acting – Stroke
31.10 in
789.00 mm
Tilt Cylinder: Double Acting – Bore Diameter
5.90 in
150.00 mm
Tilt Cylinder: Double Acting – Rod Diameter
3.50 in
90.00 mm
Tilt Cylinder: Double Acting – Stroke
21.90 in
555.00 mm
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

Service Refill Capacities

Fuel Tank
51.50 gal
195.00 L
Cooling System
8.50 gal
32.00 L
Engine Crankcase
5.30 gal
20.00 L
Transmission (Gear Box)
2.90 gal
11.00 L
Front Axles
9.20 gal (US)
35.00 l
Rear Axles
9.20 gal (US)
35.00 l
Hydraulic System (Including Tank)
44.90 gal
170.00 L
Hydraulic Tank
23.80 gal
90.00 L
Diesel Exhaust Fluid (DEF) Tank
5.00 gal
19.00 L

Transmission

Forward and Reverse - Range 1*
1-13 km/h (0.6-8 mph)
Forward and Reverse - Range 2
8.00 mile/h
13.00 km/h
Forward and Reverse - Range 3
17.00 mile/h
27.00 km/h
Forward and Reverse - Range 4
25.00 mile/h
40.00 km/h

Cab

ROPS
ISO 3471: 2008
FOPS
ISO 3449: 2005 LEVEL II

Operating Specifications

Full Turn Tip Load
22107.00 lb
10028.00 kg

Engine

Emissions
Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Stroke
5.00 in
135.00 mm
Note
* Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology.

Loader Hydraulic System

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 (1)
*3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display, when equipped.

Steering

Steering Cycle Times - Full Left to Full Right - Minimum RPM: Pump Flow Limited
3.10 s
3.10 s
Steering Cycle Times - Full Left to Full Right - Maximum RPM: 90 rpm Steering Wheel Speed
2.30 s
2.30 s

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).

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

Engine

Maximum Gross Power
188.00 hp
140.00 kW
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).

Cab

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.

Loader Hydraulic System

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).

Steering

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).

Power Train

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.

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.

Engine

Engine Model
Cat C7.1 ACERT**

Buckets

Bucket Capacities
2.5-5.0 m³ (3.2-6.5 yd³)

Weights

Operating Weight
35778.00 lb
16229.00 kg

Engine

Maximum Gross Power
173.00 HP
129.00 kW
Bore
4.00 in
105.00 mm
Stroke
5.00 in
135.00 mm
Displacement
427.00 in³
7.01 l

Cab

ROPS
ISO 3471:2008
FOPS
ISO 3449:2008 Level II

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.

Cab

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)

Engine

Emissions
Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
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.
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.
Note (4)
Spark arrestor performance as standard – Meets performance requirements of EN 1834-1.2000 (section 6.4.2 Visual Test).

Loader Hydraulic System

Lift Cylinder, Double Acting - Bore Diameter
4.70 in
120.00 mm
Lift Cylinder, Double Acting - Rod Diameter
2.60 in
65.00 mm
Lift Cylinder, Double Acting - Stroke
31.10 in
789.00 mm
Maximum Flow - Implement Pump
50.00 gal/min
190.00 l/min
Maximum Working Pressure - Implement Pump
4061.00 psi
28000.00 kPa
Relief Pressure - Tilt Cylinder
4351.00 psi
30000.00 kPa
Tilt Cylinder, Double Acting - Bore Diameter
5.90 in
150.00 mm
Tilt Cylinder, Double Acting - Rod Diameter
3.50 in
90.00 mm
Tilt Cylinder, Double Acting - Stroke
21.90 in
555.00 mm

Operating Specifications

Full Turn Tip Load
22107.00 lb
10028.00 kg

Power Train

Brakes - Parking
Spring applied hydraulically released
Brakes - Service
Outboard wet disc
Front Axle
Fixed
Rear Axle
Oscillating

Service Refill Capacities

Cooling System
7.90 gal (US)
32.00 l
Diesel Exhaust Fluid (DEF) Tank
5.00 gal (US)
19.00 l
Engine Crankcase
5.30 gal (US)
20.00 l
Fuel Tank
51.50 gal (US)
195.00 l
Hydraulic System - Including Tank
44.90 gal (US)
170.00 l
Hydraulic Tank
23.80 gal (US)
90.00 l
Transmission - Gear Box
2.90 gal (US)
11.00 l

Steering

Maximum Flow - Steering Pump
34.00 gal/min
130.00 l/min
Maximum Steering Torque - 0° (Straight Machine)
42506.00 ft·lbf
57630.00 N·m
Maximum Working Pressure - Steering Pump
3500.00 psi
24130.00 kPa
Steering Cylinder, Double Acting - Bore Diameter
3.10 in
80.00 mm
Steering Cylinder, Double Acting - Rod Diameter
2.00 in
50.00 mm
Steering Cylinder, Double Acting - Stroke
15.70 in