Cat 938M Small Wheel Loader

Small Wheel Loaders

938M Small Wheel Loader

About the Cat 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 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.

Specifications

Engine
Engine Model Cat® C7.1 ACERT™
Maximum Rated Gross Power - ISO 14396 188 HP
Maximum Rated Gross Power - ISO 14396 (DIN) 190 HP
Maximum Rated Gross Power - ISO 14396 (DIN) (Performance Power Mode: Range 1-4) 190 HP
Maximum Rated Gross Power - ISO 14396 (Performance Power Mode: Range 1-4) 188 HP
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4) 1800 r/min
Rated Net Power 182 HP
Rated Net Power - 1,800 rpm - ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Performance Power Mode: Range 1-4) 184 HP
Rated Net Power - 1,800 rpm - SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4) 182 HP
Maximum Gross Power 188 HP
Bore 4 in
Stroke 5 in
Displacement 427 in³
Emissions Engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Maximum Gross Torque - ISO 14396 (Performance Power Mode: Range 1-4) 648 lb/ft
Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*) 648 lb/ft
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Performance Power Mode: Range 1-4) 628 lb/ft
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Standard Power Mode: Range 1-3*) 628 lb/ft
Maximum Net Torque - SAE J1349 (Performance Power Mode: Range 1-4) 621 lb/ft
Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*) 621 lb/ft
Maximum Rated Gross Power - ISO 14396 (DIN) (Standard Power Mode: Range 1-3*) 175 HP
Maximum Rated Gross Power - ISO 14396 (Standard Power Mode: Range 1-3*) 173 HP
Maximum Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*) 1600 r/min
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).
Rated Net Power - 1,600 rpm - ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) 169 HP
Rated Net Power - 1,600 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*) 171 HP
Rated Net Power - 1,600 rpm - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*) 168 HP
Rated Net Power - 1,800 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4) 186 HP
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 (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.
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.
Loader Hydraulic System
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 - 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 - Total Cycle Time 9.7/10.6 seconds
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
Maximum Flow - Implement Pump 50 gal/min
Maximum Flow - Implement Pump - 3rd Function* 50 gal/min
Maximum Flow - Implement Pump - 4th Function Maximum Flow* 42 gal/min
Maximum Working Pressure - Implement Pump 4061 psi
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).
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
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
Operating Specifications
Full Turn Tip Load 22107 lb
Power Train
Brakes - Parking Spring applied hydraulically released
Brakes - Service Outboard wet disc
Front Axle Fixed
Front Axle - Traction Aid - Standard Locking 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.
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
Service Refill Capacities
Cooling System 8.5 gal (US)
Diesel Exhaust Fluid (DEF) Tank 5 gal (US)
Engine Crankcase 5.3 gal (US)
Front Axles 9.2 gal (US)
Fuel Tank 51.5 gal (US)
Hydraulic System - Including Tank 44.9 gal (US)
Hydraulic Tank 23.8 gal (US)
Rear Axles 9.2 gal (US)
Transmission - Gear Box 2.9 gal (US)
Steering
Maximum Flow - Steering Pump 34 gal/min
Maximum Steering Torque - 0° (Straight Machine) 42506 lb/ft
Maximum Steering Torque - 40° (Full Turn) 31398 lb/ft
Maximum Working Pressure - Steering Pump 3500 psi
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).
Steering Cycle Times - Full Left to Full Right - Maximum RPM: 90 rpm Steering Wheel Speed 2.3 s
Steering Cycle Times - Full Left to Full Right - Minimum RPM: Pump Flow Limited 3.1 s
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
Transmission
Forward and Reverse - Range 1* 1-13 km/h (0.6-8 mph)
Forward and Reverse - Range 2 8 mile/h
Forward and Reverse - Range 3 17 mile/h
Forward and Reverse - Range 4 25 mile/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).

Features

Efficiently Powerful

Intelligent Power Management
The Caterpillar exclusive Intelligent Power Management system has been further enhanced to monitor operator input and power availability to keep the machine working at peak efficiency and provide the operator with greater customization to suit their application.
Power on Demand
A choice of Power Modes allows you to choose between maximum fuel efficiency or boosted power along with hydraulic speed.
Standard Power Mode
  • Saves up to 10% fuel compared to K Series Cat loader.
  • Delivers equal performance compared to K Series Cat Loader.
  • Reduces cab sound levels down to a whisper quiet 64 dB(A) typical.
  • Biggest gains seen during load and carry, snow removal and roading applications.
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Performance Power Mode
  • Enabled at the push of a button (HP+).
  • Boosts engine power by up to 10% and engine speed by over 12%.
  • Increases hydraulic cycle times and productivity.
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Six Cylinders of Efficient Power
The Cat C7.1 ACERT engine provides cleaner, quieter operation while delivering superior performance and durability through a high torque, low speed design. The engine meets Tier 4 Final and Stage IV emission standards with a Clean Emissions Module that is designed to manage itself so you can concentrate on your work.
  • No downtime for regeneration with a passive low temperature system that keeps you on the job.
  • Fit for Life Diesel Particulate Filter (DPF) that is designed to exceed the engine overhaul life.
  • Extended fluid fill intervals with minimal use of Diesel Exhaust Fluid (DEF) also referred to as Adblue™ with an average of four fuel tank fills per DEF fill.
  • Configurable auto idle shut down based on time and ambient temperature to further reduce fuel burn and keep operating costs low.
  • Spark arrestor performance as standard – Meets performance requirements of EN 1834-1.2000 (section 6.4.2 Visual Test).
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Power to the Ground
Lock up and go with fully locking front differential axles that can be engaged on the move at full torque with a pull of the seat mounted joystick trigger. Maximize your traction with optional Limited Slip Differential on the rear axle to keep you climbing.
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Independent service brakes on front and rear axles provide robust stopping performance while a push button electronic park brake allows you to safely secure the machine with ease.

Work Made Easy

Optimized Z-bar Linkage
The Caterpillar patented optimized Z-bar linkage combines the digging efficiency of a traditional Z-bar with integrated tool carrier capabilities for great performance and versatility.
  • Perfect Parallelism functionality available in Fork Mode gives truly predictable performance while high tilt forces throughout the working range help you safely and confidently handle loads with precise control.
  • Visibility to bucket corners and fork tips at ground level remain excellent while sight lines at maximum lift are improved with a Generation II lift arm design.
  • Lift higher and reach further with optional High Lift linkage available on all three models.
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Quick Loading Performance Series Buckets
Performance Series Buckets deliver up to 10% higher fill factors compared to previous models, better material retention for significant productivity and fuel efficiency improvements. The buckets feature a longer floor to take a bigger bite of the pile, an open throat to heap higher and curved side bars to help with material retention. This optimized shape is echoed across the General Purpose, Light Material and High Dump bucket families.
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Smooth and Predictable Multi-Function Performance
M Series machines feature an electro-hydraulic control system that is governed by the Intelligent Power Management system for peak efficiency. The load-sensing, variable flow system senses work demand and adjusts flow and pressure to match the operators request.
  • Multi-Function without compromise through dedicated hydraulic systems featuring one pump for the Intelligent Hydrostatic drive, a 2nd pump for the implements, and a 3rd pump for the steering system. Drive, Lift and Steer simultaneously with smooth predictable control. The M Series simply does what you ask it to.
  • Programmable in-cab kick-outs are easy to set on the go for tilt, lower and lift. This feature is ideal for applications where the work cycle is repeatable, allowing you to quickly return to programmed set points such as ground and level.
  • Fine tune hydro-mechanical performance with fully adjustable 3rd and 4th function flow through the secondary display (when equipped) for a perfect marriage between machine and work tool.
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Enjoy All Day Comfort

Have a Seat and Experience:
  • Seat-mounted controls featuring a low effort joystick for lift and tilt functions along with integrated Forward/Neutral/Reverse switch, differential lock trigger and optional third and fourth auxiliary functions.
  • Superior all around visibility with single piece front windshield, new parabolic external mirrors, redesigned Generation II linkage and clean hydraulic lines routing.
  • Automatic climate control with heated rear glass and external mirrors for a quick defrost.
  • Fully adjustable controls including steering column, joystick and seat suspension.
  • Information at a glance with large primary LCD display and optional full color touch screen display.
  • An extra eye on the job site with optional integrated rear object detection and optional* rearview camera.
  • A heated and cooled seat option for added comfort in a wide range of climates.
*Standard in Europe
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Enjoy coming to work with:
  • A spacious, safe, quiet operator environment featuring ergonomic controls, seat belt notification and optional bluetooth radio with integrated microphone plus an MP3 port.
  • Easy access to vital machine parameters with the optional* secondary display that works in conjunction with the standard soft touch panel to allow real time adjustments to machine features and an integrated help button with over 25 languages.
  • Comfortable soft stops at cylinder end stroke conditions and programmed kick-out points with Caterpillar's exclusive electro-hydraulic cylinder snubbing.
  • An even smoother ride with optional Ride Control when working unloaded and loaded with excellent material retention.
  • Early starts and late finishes are made easier with optional LED lighting package that includes engine compartment lighting to illuminate the way for checking oil and coolant level, along with re-fueling the machine in dark conditions.
*Standard in Europe
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Customize Your Experience

Work as one with your machine by customizing controls.
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Flexible Power Train
A smooth, step-less electronically controlled hydrostatic transmission provides adjustable power to the ground with excellent groundspeed control and customizable feel.
  • Select your Power Train Mode:
    – Torque Converter (TC) for smooth rollout.
    – Hystat for aggressive engine braking.
    – Ice to maximize control on snow and ice.
    – Default blends the best of Hystat and Torque Converter characteristic.
  • Reduce tire wear using Rimpull control which enables you to match available tractive power to underfoot conditions.
  • Fine tune ground speed when using work tools such as brooms, snow blowers and brush cutters with Creeper Control.
  • Set Directional Shift Response, soft and smooth for material handling applications or sharp for aggressive operation.
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Adjustable Electro-Hydraulic Controls
Easily customize hydraulic performance to meet your needs.
  • Optimize hydraulic modulation with Fine Mode control when working with forks, material handling arms, and large tools.
  • Quicker hydraulic response for fine grading at speed and agriculture applications through Lift and Tilt response settings.
  • Fully adjustable ride control activation speed along with 3rd and 4th function auxiliary flows.
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Operator Profiles and Coded Start
  • The M Series Wheel Loaders will remember you and your personal settings with unique operator codes to make this machine truly yours and keep it secure.
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Configured for Success

The Way You Want It
A complete range of optional equipment and work tools give you the versatility to configure an M Series wheel loader to be successful in your business. Get with your Cat dealer to configure yours.
Guards:
  • Windshield
  • Tilt cylinder
  • Lights
  • Fender deflectors
  • Drive shaft
  • Hitch
  • Steering cylinders
  • Side power train
  • Lower power train
  • Crank case
  • Rear radiator
Debris Packages:
  • Reversing fan
  • Sealed alternator
  • Turbine precleaner
  • RESPA precleaner
Work Tools:
  • Full range of attachments
Operator Environment:
  • Seat, deluxe or premium
  • Deluxe cab (with touch screen display)
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Other Options:
  • Autolube
  • High lift linkage
  • Coupler: Fusion™ and ISO 23727
  • Auxiliary hydraulics: 3rd and 4th
  • Window washing access
  • Ride control
  • Fenders: extended and full coverage
  • Counterweights
  • Cold start package
  • Rear object detection
  • Blue Angel certification
  • Beacon
  • LED auxiliary lights
  • CPM – Cat Production Measurement
  • TPM – Tire Pressure Monitoring

Service

Get up and running quickly with ground level, daily service access and optional engine compartment lighting. Three large service doors can be opened and closed in any order to give full access to filters and service points. Extended service intervals on hydraulic and power train filters reduce service time and maximize uptime. Additional service features include:
  • Product Link™ PRO standard with optional subscription to VisionLink®.
  • Maintenance reminders through secondary display at scheduled intervals.
  • Fit for Life Diesel Particulate Filter that is designed to exceed the engine overhaul life.
  • Quick fuel filter service with Caterpillar's exclusive electric fuel priming pump.
  • Jump start studs as standard equipment.
  • Extended cleanouts with single plane cooling system and wide spaced 6 fins per inch coolers as standard.
  • Integrated Autolube (optional) with adjustable greasing frequency.

Customer Support

Renowned Cat Dealer Support
Rely on your Cat dealer to help you every step of the way with new or used machine sales, rental or rebuild options to meet your business needs.
Maximize your machine uptime with unsurpassed worldwide parts availability, trained technicians and customer support agreements.
Let us earn your business. Experience an M Series Small Wheel Loader and join the Caterpillar family.

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