938M Small Wheel Loader - Altorfer    

938M Small Wheel Loader

938M Small Wheel Loader

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.

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Weights

Operating Weight
36216lb
Operating Weight
35778lb

Buckets

Bucket Capacities
2.5-5.0 m3 (3.3-6.5 yd3)
Bucket Capacities – General Purpose
2.5-3.2 m3 (3.2-4.2 yd3)
Bucket Capacities – Light Material
3.1-5.0 m3 (4.0-6.5 yd3)
Bucket Capacities
2.5-5.0 m³ (3.2-6.5 yd³)
Bucket Capacities - Light Material
3.1-5.0 m³ (4.0-6.5 yd³)
Bucket Capacities - General Purpose
2.5-3.2 m³ (3.2-4.2 yd³)

Engine

Engine Model
Cat® C7.1 ACERT™
Rated Net Power
182HP
Maximum Rated Gross Power - ISO 14396
188HP
Maximum Rated Gross Power - ISO 14396 (DIN)
190HP
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4)
1800r/min
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)
183HP
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)
664ft·lbf
Maximum Net Torque - SAE J1349 (Performance Power Mode: Range 1-4)
649ft·lbf
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*)
1600r/min
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*)
176HP
Rated Net Power - 1,600 rpm - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
170HP
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*)
172HP
Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*)
642ft·lbf
Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*)
627ft·lbf
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Standard Power Mode: Range 1-3*)
628lb/ft
Displacement
427in3
Bore
4in
Emissions
Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Stroke
5in
Note
* Range 4 power and torque is equal to Performance Mode with Caterpillar Power by Range technology.
Maximum Gross Power
188hp
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).
Engine Model
Cat C7.1 ACERT**
Maximum Gross Power
190HP
Bore
4in
Stroke
5in
Displacement
427in³
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.
Rated Net Power - 1,600 rpm - ISO 9249 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
170HP
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).
Displacement (Standard Power Mode: Speed Range 1-3*)
427in³
Displacement (Performance Power Mode: Speed Range 1-4)
427in³
Maximum Net Torque - ISO 9249:2007 (Standard Power Mode: Range 1-3*)
628ft·lbf
Rated Net Power - 1,800 rpm - ISO 9249 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
184HP
Maximum Net Torque - ISO 9249:2007 (Performance Power Mode: Range 1-4)
650ft·lbf

Steering

Steering Cylinder: Double Acting – Bore Diameter
3.1in
Steering Cylinder: Double Acting – Rod Diameter
2in
Steering Cylinder: Double Acting – Stroke
15.7in
Maximum Flow – Steering Pump
34gal/min
Maximum Working Pressure – Steering Pump
3500psi
Maximum Steering Torque – 0° (Straight Machine)
42506lbf-ft
Maximum Steering Torque - 40° (Full Turn)
31398ft·lbf
Steering Cycle Times - Full Left to Full Right - Minimum RPM: Pump Flow Limited
3.1s
Steering Cycle Times - Full Left to Full Right - Maximum RPM: 90 rpm Steering Wheel Speed
2.3s
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).
Maximum Flow - Steering Pump
34gal/min
Maximum Steering Torque - 0° (Straight Machine)
42506ft·lbf
Maximum Working Pressure - Steering Pump
3500psi
Steering Cylinder, Double Acting - Bore Diameter
3.1in
Steering Cylinder, Double Acting - Rod Diameter
2in
Steering Cylinder, Double Acting - Stroke
15.7in
Steering Articulation Angle - Each Direction
40°
Number of Steering Wheel Turns - Full Left to Full Right or Full Right to Full Left
3.3turns
Steering Cycle Times - Full Left to Full Right - At 1,800 rpm: 90 rpm Steering Wheel Speed
2.3s

Loader Hydraulic System

Maximum Flow – Implement Pump
50gal/min
Maximum Flow - Implement Pump - 3rd Function*
50gal/min
Maximum Flow - Implement Pump - 4th Function Maximum Flow*
42gal/min
Maximum Working Pressure – Implement Pump
4061psi
Relief Pressure – Tilt Cylinder
4351psi
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Maximum Working Pressure
4061psi
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Relief Pressure
4351psi
Lift Cylinder: Double Acting – Bore Diameter
4.7in
Lift Cylinder: Double Acting – Rod Diameter
2.6in
Lift Cylinder: Double Acting – Stroke
31.1in
Tilt Cylinder: Double Acting – Bore Diameter
5.9in
Tilt Cylinder: Double Acting – Rod Diameter
3.5in
Tilt Cylinder: Double Acting – Stroke
21.9in
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 (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).
Lift Cylinder, Double Acting - Bore Diameter
4.7in
Lift Cylinder, Double Acting - Rod Diameter
2.6in
Lift Cylinder, Double Acting - Stroke
31.1in
Maximum Flow - Implement Pump
50gal/min
Maximum Working Pressure - Implement Pump
4061psi
Relief Pressure - Tilt Cylinder
4351psi
Tilt Cylinder, Double Acting - Bore Diameter
5.9in
Tilt Cylinder, Double Acting - Rod Diameter
3.5in
Tilt Cylinder, Double Acting - Stroke
21.9in
Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Raise, Ground Level to Maximum Lift
5.5s
Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Total Cycle Time
9.7s
Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Total Cycle Time
10.6s
Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Dump, at Maximum Lift Height
1.7s
Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Dump, at Maximum Lift Height
1.5s
Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Raise, Ground Level to Maximum Lift
6.2s
Hydraulic Cycle Time - Performance Mode at 1,800 rpm - Float Down, Maximum Lift to Ground Level
2.7s
Hydraulic Cycle Time - Standard Mode at 1,600 rpm - Float Down, Maximum Lift to Ground Level
2.7s
Maximum Flow - Implement Pump - 3rd Function Maximum Flow*
50gal/min

Service Refill Capacities

Fuel Tank
51.5gal
Cooling System
8.5gal
Engine Crankcase
5.3gal
Transmission (Gear Box)
2.9gal
Front Axles
9.2gal (US)
Rear Axles
9.2gal (US)
Hydraulic System (Including Tank)
44.9gal
Hydraulic Tank
23.8gal
Diesel Exhaust Fluid (DEF) Tank
5.0gal
Cooling System
7.9gal (US)
Diesel Exhaust Fluid (DEF) Tank
5gal (US)
Engine Crankcase
5.3gal (US)
Fuel Tank
51.5gal (US)
Hydraulic System - Including Tank
44.9gal (US)
Hydraulic Tank
23.8gal (US)
Transmission - Gear Box
2.9gal (US)
Note
DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1.

Transmission

Forward and Reverse - Range 1*
1-13 km/h (0.6-8 mph)
Forward and Reverse - Range 2
8mile/h
Forward and Reverse - Range 3
17mile/h
Forward and Reverse - Range 4
25mile/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).
Note (cont'd)
Factory default is 7 km/h (4.4 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).

Tires

Standard Size
20.5 R25, radial (L-3)
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)
Other Choices Also Include:
23.5 R25, radial (L-3); 650/65 R25 radial (L-3); Skidder/Agriculture; Flexports Gen II
Note (1)
Other tire choices are available. Contact your Cat dealer for details.
Standard Size
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.
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
Note (3)
Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model.

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

Axles

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

Operating Specifications

Full Turn Tip Load
22107lb
Full Turn Tip Load
22107lb

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 (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
Front Axle
Fixed
Rear Axle
Oscillating

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.
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.

Sound

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

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.