The Cat® 938K Wheel Loader sets a new standard for productivity, fuel efficiency and comfort. Extremely low sound levels, large spacious cab and intuitive controls keep you working comfortably all day long. The new optimized Z-bar loader linkage delivers the performance and breakout forces of a traditional Z-bar linkage with the parallelism and load handling capability of a tool carrier. Experience the new industry benchmark.
Engine
Net Power |
126.0 kW |
Model |
Cat® C7.1 ACERT™ |
SAE J1349 |
136.0 kW |
ISO 9249 (1997) |
137.0 kW |
EEC 80/1269 |
137.0 kW |
Bore |
105.0 mm |
Stroke |
135.0 mm |
Displacement |
7.0 L |
Net Torque |
874.0 N·m |
Weights
Operating Weight |
15146.0 kg |
Buckets
Bucket Capacities |
2.5 m3 - 5.0 m3 3.3 yd3 - 6.5 yd3 |
Dimensions
Wheelbase |
3050.0 mm |
Height to Top of ROPS/FOPS |
3340.0 mm |
Height to Center of Axle |
685.0 mm |
Ground Clearance |
386.0 mm |
Overall Length |
7604.0 mm |
Length - Rear Axle to Bumper |
1968.0 mm |
Center Line of Front Axle-Hitch |
1525.0 mm |
Wheel Base Length |
3050.0 mm |
Dump Clearance-Max Lift-45° |
2869.0 mm |
Bucket Pin Height at Max Lift |
3969.0 mm |
Overall Height - Bucket Raised |
5242.0 mm |
Reach at Max Lift and 45° Dump |
1108.0 mm |
Rack Back Angle at Max Lift |
54.0 Degrees |
Dump Angle at Max Lift |
49.0 Degrees |
Rack Back Angle at Carry |
45.0 Degrees |
Carry Height |
467.0 mm |
Digging Depth |
100.0 mm |
Operating Specifications
Static Tipping Load (Full Turn) |
9698.0 kg |
Reach - full lift/45 degree dump angle |
1108.0 mm |
Dump clearance - Full lift/45 degree dump angle |
2869.0 mm |
Articulation Angle |
40.0 Degrees |
Loader Hydraulic System
Hydraulic Cycle Time |
9.7 Seconds |
Pump flow - Implement pump |
190.0 L/min |
Maximum working pressure |
28000.0 kPa |
Hydraulic cycle time: |
9.7 sec |
Raise |
5.5 Seconds |
Dump |
1.5 Seconds |
Lower, empty, float down |
2.7 Seconds |
Total |
9.7 Seconds |
Bore |
120.0 mm |
Stroke |
789.0 mm |
Bore |
150.0 mm |
Stroke |
555.0 mm |
Steering
Steering Articulation |
40.0 Degrees |
Steering angle, each direction |
40.0 Degrees |
Steering cylinders, two, bore |
80.0 mm |
Maximum working pressure |
24130.0 kPa |
Transmission
Standard transmission max travel speeds: |
40.0 km/h |
Forward 1 |
13.0 km/h |
2 |
13.0 km/h |
3 |
27.0 km/h |
4 |
40.0 km/h |
Reverse 1 |
13.0 km/h |
2 |
13.0 km/h |
3 |
27.0 km/h |
4 |
40.0 km/h |
Service Refill Capacities
Fuel tank |
195.0 L |
Cooling system |
32.0 L |
Crankcase |
19.5 L |
Transmission |
11.0 L |
Front |
35.0 L |
Rear |
35.0 L |
Hydraulic system (including tank) |
170.0 L |
Hydraulic tank |
90.0 L |
Cab
ROPS |
SAE J1040 MAY94, ISO 3471-1994 |
FOPS |
SAE J/ISO 3449 APR98 Level II, ISO 3449 1992 Level II |
Parallel Lift Loader Linkage

Optimized Z-bar linkage delivers enhanced visibility with maximum productivity.
Optimized Z-bar Linkage
The new optimized patent-pending Z-bar linkage combines the digging efficiency of a traditional Z-bar with tool carrier capabilities for great performance and versatility.
- Parallel lift and high tilt forces throughout the working range help you safely and confidently handle loads with precise control.
- Linkage features excellent visibility to the bucket cutting edge and fork tips.
Industry Leading Operator Station

Superior visibility, ergonomics and comfort.
Best Seat on the Job Site
Enjoy all day comfort in the spacious new K Series cab:
- Extremely low sound levels.
- Superior visibility to the work tool due to wide curved windshield, redesigned Z-bar linkage, lines routing and work tool design.
- Automatic temperature control.
- Seat-mounted, ergonomic joystick for lift and tilt functions. Joystick includes integrated Forward/Neutral/Reverse switch and optional differential lock trigger, third and fourth function auxiliary hydraulics.
- Easy access to the cab with ergonomically placed grab rails, walk-up steps and large platform.
Easy to Use Instrument Panel and Display
An optional secondary display provides easy access to vital machine parameters and works in conjunction with the standard soft touch panel to allow real time adjustments.
- Machine information and diagnostics at a glance.
- Real time and historic fuel usage.
- Backup camera display.
- Help button plus 22 language capability.
- Adjustment of functions such as creep, third function flow, throttle and rimpull.
Power Train

Maximum machine power, reduced fuel consumption.
Intelligent Power Management
The Caterpillar exclusive Intelligent Power Management system actively monitors operator input and power availability to keep the machine working at peak efficiency.
Engine
The Cat® C7.1 ACERT™ engine provides cleaner, quieter operation while delivering superior performance and durability. The engine meets U.S. EPA Tier 3 and EU Stage IIIA emission requirements. Maximum engine speed is now 1,800 rpm for reduced fuel consumption and lower sound levels. The engine also features:
- Class-leading fuel efficiency, significantly reducing owning and operating costs.
- Configurable auto idle shut down feature as standard equipment.
Transmission
A smooth, step-less electronically controlled hydrostatic transmission provides adjustable power to the ground and superb groundspeed control for a multitude of tasks.
- Four speed ranges ensure maximum controllability for any task.
- Rimpull control enables you to match available tractive power to underfoot conditions, helping reduce tire wear.
- Creeper control lets you adjust machine groundspeed when using work tools such as brooms, snow blowers and brushcutters.
- Throttle lock feature allows you to maintain constant engine RPM regardless of machine speed.
Axles and Brakes
Available fully locking front differential axles and open rear differentials can be engaged at full torque on the go with a button on the joystick. Brake system includes independent service brakes on front and rear axles and a spring applied, electronically activated park brake.
Hydraulics

Smooth, efficient operation helps you get the job done faster.
Load-Sensing Hydraulic System
K Series machines feature a new electro-hydraulic control system that is governed by the Intelligent Power Management system. The load-sensing, variable flow system senses work demand and adjusts flow and pressure to match. This allows full hydraulic forces at any engine speed.
- 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.
- Caterpillar exclusive electro-hydraulic snubbing at programmed kickouts and rack/dump stops greatly improves operator comfort and component life in addition to improved material retention.
- Adjustable third function flow through the secondary display (when equipped) for use with hydro-mechanical work tools.
- Optional Ride Control System provides an even smoother ride and excellent material retention.
- Designed with dedicated pumps for steering and implements so there is no compromise in cycle times and efficiency for multi-function operation.
Work Tools

Do more jobs with one machine.
The Right Tool for the Job
An extensive range of work tools and bucket styles are available to make your Cat Wheel Loader one of the most versatile machines on the job site.
Performance Series Buckets
Performance Series Buckets utilize a system-based approach to balance bucket shape with the machine’s linkage, weight, lift and tilt capacities. They deliver higher fill factors and better material retention for significant productivity and fuel efficiency improvements. The buckets feature a longer floor, open throat and curved side bars.
Additional Buckets
- Light Material
- Multi Purpose
- Sand and Gravel
- High Dump
- Wood Chip
Material Handling Work Tools
- Pallet Forks
- Construction Forks
- Material Handling Arm
Work Tools for Special Applications
- Dozer Blades
- Snow Plows
- Brooms
- Rakes
- Log and Lumber Forks
- Pipe and Pole Forks
- Side Dump Buckets
- Grapple Buckets
- Grading Buckets
Couplers
The Cat Fusion™ interface provides coupler flexibility without compromise in breakout force and dump clearance. The advanced wedging mechanism creates a tight, rattle-free fit, eliminating play and wear for long service life. The open coupler frame design provides excellent line of sight to the work tool. An ISO 23727 coupler interface is also available for use with competitive work tools.
Options
Customize your machine to meet your needs.
Configure the Machine the Way You Want It
A variety of options are available on the Cat K Series Wheel Loaders to suit your specific application needs. See your Cat dealer for more information about the features below and additional options.
- Coupler Options
- Counterweight Options
- HID Lights
- Turbine Precleaner
- Rear Camera in Grill
- Guards
- 3rd and 4th Function Hydraulics
Additional options include:
- Power Train Side Guards
- Driveshaft Guard
- Rear Waste Gate
- RESPA Cab Filtration
- Lower Power Train Guard
- Crankcase Guard
- Optional Toolbox
Serviceability

Easy service to keep your machine working.
Easy Service Access
All service points are accessible from ground level. Three large service doors can be opened and closed in any order to give full access to filters and service points. Extended service intervals reduce service time and maximize uptime. Additional service features include:
- Caterpillar exclusive electric fuel priming pump.
- Jump start studs as standard equipment.
- Single plane cooling system with 6 fins per inch coolers as standard.
- Swing-up air conditioner condenser for easy clean out.
- Product Link ready (standard).
Customer Support
Unmatched support makes the difference.
Renowned Cat Dealer Support
Your Cat dealer is ready to help you every step of the way. From new or used machine sales, to rental or rebuild options, your Cat dealer can provide an optimal solution to your business needs. Unsurpassed worldwide parts availability, trained technicians and customer support agreements maximize your machine uptime.
POWER TRAIN
Axle seal guards
Auto idle shut down feature
Brake/decelerator pedal
Cat C6.6 ACERT™ engine
Coolant protection to -34° C (-29° F)
Differential lock in front axle
Differential rear open
Dry type air cleaner
Enclosed wet disc full hydraulic brakes
Fuel priming pump, automatic
Fuel water separator
Hydraulically driven demand cooling fan
Hydrostatic transmission with electronic speed range control
Lubed for life driveshafts
Parking brake, electric
Single plane cooling system with remote coolant reservoir
SOS port, engine, coolant and transmission oil
Thermal starting aid (glow plugs)
Throttle lock
Transmission directional control on implement joystick
Transmission sight gauge
Transmission oil cooler
HYDRAULICS
Heavy duty hydraulic cooler
Hydraulic diagnostic connectors and SOS
Hydraulic sight gauge, visible
Load sensing hydraulics and steering
Seat-mounted hydraulic controls with F/N/R
Heavy duty hydraulic cooler
Hydraulic diagnostic connectors and SOS
Hydraulic sight gauge, visible
Load sensing hydraulics and steering
Seat-mounted hydraulic controls with F/N/R
ELECTRICAL
Alternator, 115-amp, heavy duty
12V power supply in cab (2)
Batteries, 1,000 CCA (2)
24 volt system
Back-up alarm
Battery disconnect switch
Beacon ready
Diagnostic connector
Directional signals front and rear
Emergency shutdown switch
Halogen work lights front and rear
Heavy duty gear reduction starter
LED rear stop tail turn lights
Remote jump start post
Resettable main and critical function breakers
Roading lights front and rear
Alternator, 115-amp, heavy duty
12V power supply in cab (2)
Batteries, 1,000 CCA (2)
24 volt system
Back-up alarm
Battery disconnect switch
Beacon ready
Diagnostic connector
Directional signals front and rear
Emergency shutdown switch
Halogen work lights front and rear
Heavy duty gear reduction starter
LED rear stop tail turn lights
Remote jump start post
Resettable main and critical function breakers
Roading lights front and rear
OPERATOR ENVIRONMENT
75 mm (3 in) retractable seatbelt
Automatic temperature control
Cab, enclosed ROPS/FOPS pressurized and sound suppressed
Cup holder
External heated mirrors
Ground level cab door release
Gauges: Digital direction indicator Digital hour meter and odometer Digital speedometer Engine coolant temperature gauge Fuel level indicator Hydraulic oil temperature gauge Tachometer
Hydraulic control lockout
Interior cab lighting, door and dome
Interior rearview mirrors (2)
Lunch box storage
Operator warning system indicators
Radio ready speakers
Rear window defrost, electric
Removable floormat
Seat-mounted electronic implement controls, adjustable
Sliding glass on the side windows
Steering column mounted multi function control - lights, wipers, turn signal
Suspension seat, fabric
Tilt and telescopic steering wheel
Tinted front glass
Wet arm wiper/washer, 2-speed and intermittent, front
Wet arm wiper/washer, rear
OTHER STANDARD EQUIPMENT
Automatic bucket/fork positioner, adjustable in-cab
Automatic lift and bucket kickouts, adjustable in-cab
Fenders
Large-access enclosure doors with adjustable close/open force
Parallel lift loader linkage with sealed pins
Recovery hitch with pin
Remote mounted lubrication points
Toolbox, lockable
Vandalism protection - lockable compartments
EU STANDARD EQUIPMENT
Deluxe cab
Secondary display
Rearview camera
Antifreeze/coolant, extended-life, protects to -50° C (-58° F)
Beacon light, rotating or strobe
Cab, deluxe includes:
Automatic blower control
Electrically adjustable external heated mirrors (2)
LED interior lighting
Secondary display
Visor
Camera, rearview
Cold start package:
Ether starting aid
Block heater
Additional batteries (2)
Counterweight, heavy
Counterweight, logger
Coupler, Fusion
Coupler, ISO 23727
Coupler, jumper lines, third function
Debris package
Debris package - cleaning arrangement
Fenders, roading
Guards
Power train, lower
Power train, side
Crankcase
Driveshaft
Windshield
Hydraulic control auxiliary, third and fourth function
Jumper lines, third function
Lights, auxiliary, halogen or HID
Machine Security System
Product Link
Radio packages:
Radio ready with Bluetooth interface, microphone and auxiliary inputs for MP3 players
Radio, AM/FM with CD player
Radio, AM/FM with CD player deluxe, Bluetooth interface, microphone and auxiliary inputs for MP3 players
Ride Control System
Seats:
Deluxe seat - fully adjustable fabric air suspension seat with high seat backrest
Steering:
Dual mode
Secondary
Dual mode
Secondary
Toolbox, additional
Work tools