Caterpillar

938M Small Wheel Loader

Name: 938M Small Wheel Loader
Brand: Caterpillar

Maximum Gross Power

188 hp

140 kW

Operating Weight

35778 lb

16229 kg

Bucket Capacities

2.5-5.0 m3 (3.2-6.5 yd3)

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 ACERT engine works in concert with an intelligent hystat power train to deliver fuel efficiency as standard. Meets Tier 4 Final/Stage V 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.

Media

M Series Small Wheel Loaders | At Work

M Series Small Wheel Loaders | Overview

Built in Quality: Cat® Small Wheel Loaders Manufactured in Clayton, NC

Safety and Service Overview | Cat® 926M, 930M, 938M Small Wheel Loader

Kick-Outs, Snubbing, Wrap-Out and Soft Detents | M Series Small Wheel Loader Operator Tips

Secondary Display Navigation | M Series Small Wheel Loader Operator Tips

Preventative Maintenance | M Series Small Wheel Loader Operator Tips

Coded Start Feature/Individual Operator Profiles | M Series Small Wheel Loader Operator Tips

Creeper Control | M Series Small Wheel Loader Operator Tips

Rim Pull | M Series Small Wheel Loader Operator Tips

Efficient Hystat Operation | M Series Small Wheel Loader Operator Tips

Throttle Lock | M Series Small Wheel Loader Operator Tips

Fine Mode Control and Perfect Parallelism | M Series Small Wheel Loader Operator Tips

Quick Steer | M Series Small Wheel Loader Operator Tips

Power Train Modes | M Series Small Wheel Loader Operator Tips

Cab Controls and Features | M Series Small Wheel Loader Operator Tips

Hydro-mechanical Applications | M Series Small Wheel Loader Operator Tips

Third and Fourth Auxiliary Flow | M Series Small Wheel Loader Operator Tips

Reversing Fan | M Series Small Wheel Loader Operator Tips

Customize Your Experience | M Series Small Wheel Loader Operator Tips

Diesel Exhaust Fluid (DEF) Fill Alarm | M Series Small Wheel Loader Operator Tips

Cat® Production Measurement (CPM) | M and K Series Small Wheel Loader Operator Tips

Cat® Production Measurement (CPM) Updates | M and K Series Small Wheel Loader Operator Tips

Differential Lock | M Series Small Wheel Loader Operator Tips

Tire Pressure Monitoring System | M Series Small Wheel Loader Operator Tips

Tire Pressure Monitoring System Updates | M Series Small Wheel Loader Operator Tips

Engine Idle Shutdown | M and K Series Small Wheel Loader Operator Tips

Continuously Adjustable Creep Mode | M and K Series Small Wheel Loader Operator Tips

Operator ID and Machine Security | M and K Series Small Wheel Loader Operator Tips

Exterior

Model shown represents features on all Cat® Small Wheel Loaders except where indicated.

Interior

Model shown represents features on all Cat® Small Wheel Loaders except where indicated.

Documents

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Features

Efficiently Powerful

Work Made Easy

Enjoy All Day Comfort

Customize Your Experience

Service

Customer Support

Sustainability

Specifications

US Metric

Engine

Spec	Value
Maximum Gross Power	188 hp 140 kW
Displacement (Standard Power Mode: Speed Range 1-3*)	427 in³ 7.01 l
Maximum Rated Gross Power – Maximum Engine Speed (Standard Power Mode: Range 1-3*)	1600 r/min 1600 r/min
Rated Net Power – 1,800 rpm – SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4)	183 hp 137 kW
Maximum Gross Torque – ISO 14396 (Standard Power Mode: Range 1-3*)	642 ft·lbf 870 N·m
Maximum Gross Power – 1,600 rpm – ISO 14396 (DIN) (Standard Power Mode: Range 1-3*)	176 mhp 176 mhp
Maximum Net Torque – SAE J1349 (Performance Power Mode: Range 1-4)	649 ft·lbf 880 N·m
Maximum Gross Power – 1,800 rpm – ISO 14396 (Performance Power Mode: Range 1-4)	188 hp 140 kW
Rated Net Power – 1,600 rpm – ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*)	172 mhp 172 mhp
Maximum Net Torque – SAE J1349 (Standard Power Mode: Range 1-3*)	627 ft·lbf 850 N·m
Rated Net Power – 1,800 rpm – ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4)	186 mhp 186 mhp
Maximum Rated Gross Power – Maximum Engine Speed (Performance Power Mode: Range 1-4)	1800 r/min 1800 r/min
Maximum Gross Torque – ISO 14396 (Performance Power Mode: Range 1-4)	664 ft·lbf 900 N·m
Displacement (Performance Power Mode: Speed Range 1-4)	427 in³ 7.01 l
Maximum Gross Power – 1,800 rpm – ISO 14396 (DIN) (Performance Power Mode: Range 1-4)	190 mhp 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. 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 C7.1 ACERT
Rated Net Power – 1,600 rpm – SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)	170 hp 127 kW
Maximum Gross Power – 1,600 rpm – ISO 14396 (Standard Power Mode: Range 1-3*)	173 hp 129 kW
Note (2)	Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology. 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. 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 127 kW
Maximum Net Torque – ISO 9249:2007 (Standard Power Mode: Range 1-3*)	628 ft·lbf 852 N·m
Rated Net Power – 1,800 rpm – ISO 9249 at Minimum Fan Speed (Performance Power Mode: Range 1-4)	184 hp 137 kW
Maximum Net Torque – ISO 9249:2007 (Performance Power Mode: Range 1-4)	650 ft·lbf 882 N·m

Buckets

Spec	Value
Bucket Capacities	2.5-5.0 m3 (3.2-6.5 yd3) 2.5-5.0 m3 (3.2-6.5 yd3)
Bucket Capacities – Light Material	3.1-5.0 m³ (4.0-6.5 yd³) 3.1-5.0 m³ (4.0-6.5 yd³)
Bucket Capacities – General Purpose	2.5-3.2 m³ (3.2-4.2 yd³) 2.5-3.2 m³ (3.2-4.2 yd³)

Weights

Spec	Value
Operating Weight	35778 lb 16229 kg

Cab

Spec	Value
ROPS	ISO 3471:2008 ISO 3471:2008
FOPS	ISO 3449:2008 Level II 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. 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. 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) 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)

Service Refill Capacities

Spec	Value
Transmission – Gear Box	2.9 gal (US) 11 l
Engine Crankcase	5.3 gal (US) 20 l
Hydraulic System – Including Tank	44.9 gal (US) 170 l
Rear Axles	9.2 gal (US) 35 l
Front Axles	9.2 gal (US) 35 l
Diesel Exhaust Fluid (DEF) Tank	5 gal (US) 19 l
Note	DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1. DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1.
Hydraulic Tank	23.8 gal (US) 90 l
Fuel Tank	51.5 gal (US) 195 l
Cooling System	7.9 gal (US) 32 l

Loader Hydraulic System

Spec	Value
Note (1)	3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display, when equipped. 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 5.5 s
Hydraulic Cycle Time – Performance Mode at 1,800 rpm – Total Cycle Time	9.7 s 9.7 s
Relief Pressure – Tilt Cylinder	4351 psi 30000 kPa
Hydraulic Cycle Time – Standard Mode at 1,600 rpm – Total Cycle Time	10.6 s 10.6 s
Maximum Working Pressure – Implement Pump	4061 psi 28000 kPa
Relief Pressure – Tilt Cylinder – 3rd and 4th Function Maximum Working Pressure	4061 psi 28000 kPa
Hydraulic Cycle Time – Standard Mode at 1,600 rpm – Dump, at Maximum Lift Height	1.7 s 1.7 s
Hydraulic Cycle Time – Performance Mode at 1,800 rpm – Dump, at Maximum Lift Height	1.5 s 1.5 s
Hydraulic Cycle Time – Standard Mode at 1,600 rpm – Raise, Ground Level to Maximum Lift	6.2 s 6.2 s
Hydraulic Cycle Time – Performance Mode at 1,800 rpm – Float Down, Maximum Lift to Ground Level	2.7 s 2.7 s
Maximum Flow – Implement Pump – 4th Function Maximum Flow*	42 gal/min 160 l/min
Relief Pressure – Tilt Cylinder – 3rd and 4th Function Relief Pressure	4351 psi 30000 kPa
Hydraulic Cycle Time – Standard Mode at 1,600 rpm – Float Down, Maximum Lift to Ground Level	2.7 s 2.7 s
Maximum Flow – Implement Pump	50 gal/min 190 l/min
Maximum Flow – Implement Pump – 3rd Function Maximum Flow*	50 gal/min 190 l/min

Steering

Spec	Value
Maximum Working Pressure – Steering Pump	3500 psi 24130 kPa
Steering Articulation Angle – Each Direction	40° 40°
Maximum Flow – Steering Pump	34 gal/min 130 l/min
Number of Steering Wheel Turns – Full Left to Full Right or Full Right to Full Left	3.3 turns 3.3 turns
Maximum Steering Torque – 0° (Straight Machine)	42506 ft·lbf 57630 N·m
Maximum Steering Torque – 40° (Full Turn)	31398 ft·lbf 42570 N·m
Steering Cycle Times – Full Left to Full Right – At 1,800 rpm: 90 rpm Steering Wheel Speed	2.3 s 2.3 s

Transmission

Spec	Value
Forward and Reverse – Range 3	17 mile/h 27 km/h
Forward and Reverse – Range 4	25 mile/h 40 km/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). 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).
Forward and Reverse – Range 1*	1-13 km/h (0.6-8 mph) 1-13 km/h (0.6-8 mph)
Forward and Reverse – Range 2	8 mile/h 13 km/h

Sound

Spec	Value
Note (1)	European Union Directive “2000/14/EC” European Union Directive “2000/14/EC”
Average Exterior Sound Pressure (ISO 6395:2008)	101 dB(A) 101 dB(A)
Operator Sound Pressure (ISO 6396:2008)	72 dB(A) 72 dB(A)

Tires

Spec	Value
Note (1)	Other tire choices are available. Contact your Cat dealer for details. Other tire choices are available. Contact your Cat dealer for details.
Standard Size	20.5 R25, radial (L-3) 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. 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 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. Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model.

Axles

Spec	Value
Rear	Oscillating ±11 degrees; Open differential (standard); Limited slip differential (optional) Oscillating ±11 degrees; Open differential (standard); Limited slip differential (optional)
Front	Fixed; Locking differential (standard) Fixed; Locking differential (standard)

Air Conditioning System

Spec	Value
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 1.9 kg of refrigerant which has a CO2 equivalent of 2.717 metric tonnes.

Sustainability

Spec	Value
Recyclability	94% 94%

Standard Equipment

POWER TRAIN

Auto idle shut down feature
Cat C7.1 ACERT engine
– Power modes (Standard and Performance)
– Power by range (High Power in Range 4)
– Turbocharged and aftercooled
– Filtered crankcase breather
– Diesel particulate filter
– Selective Catalyst Reduction
Coded start (requires secondary display)
Coolant protection to –34° C (–29° F)
Enclosed wet disc full hydraulic brakes
Fuel priming pump, automatic
Hydraulically driven demand cooling fan
Hydrostatic transmission with electronic control
– Operator modes (Default, TC, Hystat, and Ice)
– Directional Shift Aggressiveness (fast, medium, slow)
– Rimpull control, adjust wheel torque
– Creeper control, adjust ground speed
Parking brake, electric
Single plane cooling package wide six fins per inch density
Throttle lock and max speed limiter

HYDRAULICS

Automatic lift and bucket kickouts, adjustable in-cab
Bucket and fork modes, adjustable in-cab
Cylinder damping at kickout and mechanical end stops
Fine mode control (fast, medium, slow) in fork mode
Hydraulic response setting (fast, medium, slow)
Hydraulic diagnostic connectors and S·O·SSM ports
Load sensing hydraulics and steering

ELECTRICAL

Alternator, 115 amp, heavy duty
12V power supply in cab (2)
Batteries, 1,000 CCA (2) 24V system, disconnect switch
Back-up alarm
Emergency shutdown switch
Halogen work and roading lights, LED rear tail lights
Product Link™ PRO with three year subscription
Remote jump start post
Resettable main and critical function breakers

OPERATOR ENVIRONMENT

75 mm (3 in) retractable seat belt, with audible alarm and indicator
Automatic temperature control
External heated mirrors with lower parabolic
Hydraulic control lockout
Interior cab lighting, door and dome
Interior rearview mirrors (2)
Lunch box storage
Radio ready speakers
Rear window defrost, electric
Seat-mounted electronic implement controls, adjustable
Column mounted multi function control – lights, wipers, turn signal
Tilt and telescopic steering wheel
Tinted front glass
Wet arm wiper/washer, 2-speed and intermittent, front

OTHER STANDARD EQUIPMENT

Large-access enclosure doors with adjustable close/open force
Parallel lift loader linkage

EU STANDARD EQUIPMENT

Deluxe cab
Secondary display
Rearview camera

Optional Equipment

OPTIONAL EQUIPMENT

Autolube, integrated in secondary display
Auxiliary flow, third and fourth function, adjustable through secondary display
Beacon light, strobe
Cab, deluxe (standard in Europe, optional in North America)
– Electrically adjustable external heated mirrors (2)
– Secondary display to enable features and adjust parameters
– Sunscreen, front and rear
Camera, rearview (standard in Europe)
Cold start package
Counterweight, (heavy and logger)
Coupler, (Fusion and ISO 23727)
Debris packages (low, medium, high)
Fenders (extended cover and full coverage)
Guarding (machine and operator)
Linkage, high lift
Lights, auxiliary, halogen or LED with engine and DEF compartment lights
Object Detection
Product Link ELITE with capabilities for software push, data logging, histogram and trend mapping
Radio packages
Ride Control System, adjustable through secondary display
Seats
– Deluxe seat – fully adjustable fabric air suspension seat with mid backrest and mechanical lumbar support
– Premium seat – fully adjustable leather and fabric air suspension with high backrest and air lumbar support. Seat is heated and ventilated on bottom cushion and backrest.
Steering
– Dual mode and secondary
NOTE: Not all features are available in all regions.