938 Small Wheel Loader

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Description

Technical Specifications

Benefits and Features

Equipment

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Cat® wheel loaders set the standard for productivity, fuel efficiency, operator comfort and low operating costs. The Cat 938 Small Wheel Loader features a high torque C7.1 engine that works in conjunction with an intelligent hydrostatic power train to deliver exceptional fuel efficiency. Meets U.S. EPA Tier 4 Final and EU Stage V emission standards, designed to manage itself so you can concentrate on your work. Extended service intervals to 1000 hours reduce fluid and filter use by up to 45% (compared to previous M Series models) while keeping operating cost low.

Engine
Rated Gross Power - SAE J1995	191 hp
Engine Model	Cat C7.1*
Performance Mode	Automatic
Rated Gross Power - Rated Engine Speed	1800 r/min
Rated Gross Power - SAE J1995 (DIN)	194 mhp
Rated Engine Power - ISO 14396	188 hp
Rated Engine Power - ISO 14396 (DIN)	191 mhp
Rated Net Power - SAE J1349 at Minimum Fan Speed	185 hp
Rated Net Power - ISO 9249 at Minimum Fan Speed	185 hp
Rated Net Power - ISO 9249 (DIN) at Minimum Fan Speed	188 mhp
Maximum Gross Torque - Engine Speed	1400 r/min
Maximum Gross Torque - SAE J1995	673 ft·lbf
Maximum Gross Torque - ISO 14396	664 ft·lbf
Maximum Net Torque - SAE J1349	656 ft·lbf
Maximum Net Torque - ISO 9249	658 ft·lbf
Displacement	427 in³
Bore	4 in
Stroke	5 in
Note	*Meets U.S EPA Tier 4 Final, EU Stage V off-highway, and Japan 2014 emission standards.
Note (1)	Advertised power is tested per the specified standard in effect at the time of manufacture
Note (2)	Net power ratings are tested at the reference conditions for the specified standard and denote power available at the flywheel when 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.
Weights
Operating Weight	35528 lb
Operating Weight - High Lift	36210 lb
Buckets
Bucket Capacities	1.9-5.0 m3 (2.5-6.5 yd3)
Steering
Steering Cylinder - Bore Diameter	3.1 in
Steering Cylinder - Rod Diameter	2 in
Steering Cylinder - Stroke	15.7 in
Maximum Flow - Steering Pump	34 gal/min
Maximum Working Pressure - Steering Pump	3500 psi
Steering Cycle Times (Full Left to Full Right) - Minimum RPM: Pump Flow Limited	3.1 s
Steering Cycle Times (Full Left to Full Right) - Maximum RPM: 90 RPM Steering Wheel Speed	2.3 s
Loader Hydraulic System
Maximum Flow - Implement Pump	50 gal/min
Maximum Flow - Implement Pump - 3rd Function Maximum Flow*	50 gal/min
Maximum Flow - Implement Pump - 4th Function Maximum Flow*	42 gal/min
Maximum Working Pressure - Implement Pump	4061 psi
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
Lift Cylinder: Standard Lift Linkage - Bore Diameter	4.7 in
Lift Cylinder: Standard Lift Linkage - Rod Diameter	2.6 in
Lift Cylinder: Standard Lift Linkage - Stroke	31.1 in
Tilt Cylinder: Standard Lift Linkage - Bore Diameter	5.9 in
Tilt Cylinder: Standard Lift Linkage - Rod Diameter	3.5 in
Tilt Cylinder: Standard Lift Linkage - Stroke	21.9 in
Hydraulic Cycle Time - Raise, Ground Level to Maximum Lift	5.5 s
Hydraulic Cycle Time - Dump (at Maximum Lift Height)	1.5 s
Hydraulic Cycle Time - Float Down, Maximum Lift to Ground Level	2.7 s
Hydraulic Cycle Time - Total Cycle Time	9.7 s
Note	*3rd and 4th function flow is fully adjustable from 20% to 100% of maximum flow through the secondary display when equipped.
Service Refill Capacities
Fuel Tank	51.5 gal (US)
Cooling System	7.9 gal (US)
Engine Crankcase	5.3 gal (US)
Transmission - Gear Box	2.2 gal (US)
Front Axles	9.2 gal (US)
Rear Axles	9.2 gal (US)
Hydraulic System - Including Tank	4.93 gal (US)
Hydraulic Tank	23.8 gal (US)
Diesel Exhaust Fluid (DEF) Tank	5 gal (US)
Note	DEF used in Cat systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1:2019.
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).
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), 17.5 R25, radial (L-2), 17.5 R25, radial (L-3), 17.5 R25, radial (L-5), 550/65 R25 radial (L-3), Skidder/Agriculture
Note (1)	Other tire choices are available. Contact your Cat dealer for details.
Note (2)	In certain applications, the loader’s productive capabilities may exceed the tire’s tonnes-km/h (ton-mph) capabilities.
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
Axles
Front	Fixed; Locking differential (standard)
Rear	Oscillating ± 11 degrees; Open differential (standard); Limited slip differential (optional)
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 (4.2 lb) of refrigerant which has a CO2 equivalent of 2.717 metric tonnes (2.99 tons).
Sound
Operator Sound Pressure (ISO 6396:2008)	68 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)	101 dB(A)
Note (1)	European Union Directive 2000/14/EC and UK Noise Regulation 2001 No. 1701.
Sustainability
Recyclability	96%
Dimensions with Bucket - Standard Lift
Height - Ground to Cab**	10.92 ft
Height - Ground to Beacon**	12.17 ft
Height - Ground to Axle Center**	2.25 ft
Height - Ground Clearance**	1.25 ft
Length - Overall*	25.08 ft
Length - Rear Axle to Bumper	6.42 ft
Length - Hitch to Front Axle	5 ft
Length - Wheel Base	10 ft
Clearance - Bucket at 45°*	9.3 ft
Clearance - Load over Height**	11 ft
Clearance - Level Bucket**	11.9 ft
Height - Bucket Pin**	13 ft
Height - Overall**	17.33 ft
Reach - Bucket at 45°*	3.75 ft
Carry Height - Bucket Pin	1.33 ft
Dig Depth**	4 in
Width - Bucket	9 ft
Width - Tread Center	6.83 ft
Turning Radius - Over Bucket	20.08 ft
Width - Over Tires	8.83 ft
Turning Radius - Outside of Tires	18.16 ft
Turning Radius - Inside of Tires	9.33 ft
Rack Angle at Full Lift	54 °
Dump Angle at Full Lift	49 °
Rack Angle at Carry	43 °
Departure Angle	33 °
Articulation Angle	40 °
Operating Weight	35528 lb
Note (1)	*Vary with bucket.
Note (2)	**Vary with tire.
Note (3)	Dimensions listed are for a machine configured with 2.5 m³ (3.2 yd³) general purpose Fusion™ bucket, bolt-on cutting edge, standard counterweights, additional guarding, 80 kg (176 Ib) operator and 20.5 R25 (L-3) XHA2 tires.
Dimensions with Bucket - High Lift
Height - Ground to Cab**	10.92 ft
Height - Ground to Beacon**	12.17 ft
Height - Ground to Axle Center**	2.25 ft
Height - Ground Clearance**	1.25 ft
Length - Overall*	27.58 ft
Length - Rear Axle to Bumper	6.42 ft
Length - Hitch to Front Axle	5 ft
Length - Wheel Base	10 ft
Clearance - Bucket at 45°*	11.16 ft
Clearance - Load over Height**	11.66 ft
Clearance - Level Bucket**	13.83 ft
Height - Bucket Pin**	14.92 ft
Height - Overall**	19.2 ft
Reach - Bucket at 45°*	4.66 ft
Carry Height - Bucket Pin	2 ft
Dig Depth**	5.25 in
Width - Bucket	9 ft
Width - Tread Center	6.83 ft
Turning Radius - Over Bucket	21.25 ft
Width - Over Tires	8.83 ft
Turning Radius - Outside of Tires	18.16 ft
Turning Radius - Inside of Tires	9.33 ft
Rack Angle at Full Lift	53 °
Dump Angle at Full Lift	47 °
Rack Angle at Carry	48 °
Departure Angle	33 °
Articulation Angle	40 °
Operating Weight	36210 lb
Note (1)	*Vary with bucket.
Note (2)	**Vary with tire.
Note (3)	Dimensions listed are for a machine configured with 2.5 m³ (3.2 yd³) general purpose Fusion™ bucket, bolt-on cutting edge, standard counterweights, additional guarding, 80 kg (176 Ib) operator and 20.5 R25 (L-3) XHA2 tires.

Enjoy All Day Comfort

Have a seat in the new Cat small wheel loader and enjoy automatic temperature control, class leading sound levels, enhanced all-around visibility and low-effort joystick controls that move with you on a fully adjustable seat suspension. A large spacious operator environment combined with Caterpillar hydraulic cylinder damping and smooth predictable controls make this the most comfortable seat on your jobsite.
An upgrade to multi-view camera and rear object detection gives you an extra eye on the jobsite while the new optional force feedback joystick steering keeps you feeling confident on those long shifts. The operator not present function helps to isolate the machine if you leave the environment; while seat belt notifications give you a gentle reminder to buckle up.

Efficiently Powerful

Experience the difference with an intelligent hydrostatic power train and industry leading fuel savings through a lower maximum engine speed working in combination with a new auto engine RPM mode. This provides efficiency as standard with a boost in power when you need it. Optimize traction and minimize wheel slip with a new Auto Wheel Torque system tuned to provide peak performance while maximizing tire life and keeping operating costs low. Track your production and accurately hit your load targets with Cat Payload. 250 hours of Cat Payload demonstration will be included as standard with an optional subscription for extended use.

Work Made Easy

Move more with the Caterpillar patented quick loading performance series buckets and optimized Z-bar linkage with enhanced forward visibility that combines the digging efficiency of a traditional Z-bar with tool carrier capabilities. The parallel lift and high tilt forces throughout the working range allow you to confidently handle loads with precise control.
Multi-function work has never been easier with dedicated pumps for each system and a flow sharing implement valve governed by an intelligent power management system. Simultaneously lift, steer, and drive without compromise. Upgrade to autolube and tire pressure monitoring to make service easy and get to work quicker. Light the way with auto roading lights that come on at night fall.

Customize Your Experience

Meet your application requirements and individual preferences with Caterpillar industry first Hystat™ Operator Modes featuring four unique power train settings. Select classic torque converter for smooth rollout, conventional hystat for aggressive engine braking, an ice mode that maximizes your control on slippery underfoot, and an all new single pedal mode for simplified use.
Fine tune machine performance with adjustments at your fingertips through programmable joysticks, soft touch buttons, and a new jog dial that works in combination with a standard touch screen display. Quickly recall attachment profiles that maintain key settings for versatility on the jobsite and optimal efficiency.

Upgrades and Services

Enjoy a full range of upgrades and accessories to configure your small wheel loader for a broader range of applications.
Utilize readily available services and maintenance parts, including a range of self-service options (SSO) and dealer installed kits.

Purpose Built: Handlers Arrangements - Aggregate Handler

Increased Payload: Additional counterweight improves stability without reducing ground clearance or departure angle to maximize performance.
Long Life Sand and Gravel Buckets: Performance series buckets deliver higher fill factors and better material retention for significant productivity and fuel efficiency improvements. Buckets feature a long floor, open throat, curved side bars and additional serviceable wear plates including corner guards.
Protect your Power Train: Increase your fording depth with optional elevated breathers. Remote mounted high on the machine for the front and rear axles and hydrostatic gear box. Allows settling pond cleanout without contamination.

Purpose Built: Handlers Arrangements - Waste Handler

Guard Your Investment: Choose from a complete range of optional guarding to protect your machine from the harsh environment of a waste handling application. Machine guarding is purpose built to protect the machine’s major components.
Breathe Clean: Maximize your engine life and extend filter cleaning intervals with a turbine pre-cleaner. Keep cool with a reversing fan to purge the single plane, widely spaced core cooling package and brush-less sealed alternator. Breathe clean with a powered pre-cleaner for the operator environment.
Maximize Tire Life: Fine tune your wheel torque to match the underfoot conditions and maximize performance while extending tire life. Standard auto wheel torque and auto differential lock are ideal for waste handling applications.

Sustainability

The Cat® C7.1 engine meets U.S. EPA Tier 4 Final, EU Stage V and Korea Tier 5 emission standards.
Engine Idle Management System (EIMS) helps maximize fuel efficiency and reduce greenhouse gas emissions while maintaining machine performance.
Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
Performance Series Buckets have rounded side boards, a longer floor and open angle to carry more and load quicker so each pass is the most efficient.
Rimpull Control is a quick way to adjust the torque to the tires for less slipping and tire wear.
Cat® Production Measurement provides real-time payload weighing which help you maximize productivity, reduce fuel burn and greenhouse gas emissions, all while improving job site efficiency and lowering costs.
Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
Power on Demand, transparent to the operator, provides full-time efficiency and power when you need it.
Tire Pressure Monitoring provides real-time tire pressure information to the operator to help increase tire wear and achieve better fuel efficiency and reduced greenhouse gas emissions.
Intelligent Hystat Transmission helps improves control and reduces fuel consumption and greenhouse gas emissions in load and carry applications.
Variable Displacement Pumps match power to load as application requirements change.

Standard Equipment:

NOTE: Not all features are available in all regions.
Operator Environment
- 75 mm (3 in) retractable seatbelt
- Automatic temperature control
- Cab, enclosed ROPS/FOPS pressurized and sound suppressed
- Push to Start
- 8 Inch Touch Screen
- Jog Dial with screen control
- Programmable Joystick
- Cup holders
- External mirrors with lower parabolic
- Ground level cab door release
- Hydraulic control lockout
- Interior cab lighting, door
- Lunch box storage
- Operator Not Present system
- Radio ready speakers
- Rear window defrost, electric
- Seat mounted electronic implement controls, adjustable
- Sliding glass on side window
- Column mounted multi function control lights, wipers, turn signal
- Suspension seat, fabric
- Tilt steering wheel
- Tinted front glass
- Wet arm wiper/washer, 2-speed and intermittent, front
- Wet arm wiper washer, rear
- Mounting Provision
- Digital hour meter, odometer and tachometer
- Digital ground speedometer and direction indicator
- Engine coolant temperature gauge
- Fuel and diesel exhaust fluid levels
- Hydraulic oil temperature gauge
Power Train
- Cat C7.1 engine
- Auto idle shut down feature
- Auto Engine RPM
- Auto Differential Lock
- Tier 4 Final/EU Stage V compliant
- Turbocharged and aftercooled
- Filtered crankcase breather
- Diesel particulate filter
- Selective catalyst reduction
- Dry type air cleaner
- Coolant protection to –34 °C (–29 °F)
- Fuel priming pump, automatic
- Fuel water separator
- Differential lock in front axle
- Axle seal guards
- Enclosed wet disc full hydraulic brakes
- Parking brake, electric
- Lubed for life driveshafts
- Hydrostatic transmission with electronic control
- Operator modes (TC, Hystat,
- Single Pedal and Ice)
- Directional shift aggressiveness (fast, medium, slow)
- Auto Wheel Torque control, adjust wheel torque
- Creeper control, adjust ground speed
- Single plane cooling package, wide 6 fins per inch density
- Hydraulically driven demand cooling fan
- Scheduled Oil Sampling (S·O·SSM) port, engine, coolant, transmission
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)
- Hydraulic response setting (fast, medium, slow)
- Hydraulic diagnostic connectors and
- S·O·S ports
- Hydraulic sight gauge, visible
- Load sensing hydraulics and steering
- Seat mounted hydraulic joystick controls
- Cat Payload 250 hours of Demo
Electrical
- Alternator, 115-amp, heavy duty
- 12V power supply in cab (2)
- Batteries, 1,000 CCA (2) 24-volt system, disconnect switch
- Back up alarm
- Emergency shutdown switch
- LED rear stop and turn lights
- Heavy duty gear reduction starter
- Product Link^™ Elite
- Remote jump start post
- Resettable main and critical function breakers
- Roading lights front and rear
Other
- Large-access enclosure doors with adjustable close/open force
- Parallel lift loader linkage
- Recovery hitch with pin
- Remote mounted lubrication points
- Lockable compartments
- 1000-hour Service Intervals (after initial 500)