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938M Small Wheel Loader

938M Small Wheel Loader

At a Glance

Maximum Gross Power
188 HP
Operating Weight
35778 lb
Bucket Capacities
2.5-5.0 m³ (3.2-6.5 yd³)
ROPS
ISO 3471:2008
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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 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.

Engine

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Maximum Gross Power 188HP
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4) 1800r/min
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 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4) 186mhp
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 Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*) 1600r/min
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 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*) 172mhp
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 Gross Power - 1,800 rpm - ISO 14396 (Performance Power Mode: Range 1-4) 188HP
Engine Model Cat C7.1 ACERT**
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.
Displacement (Performance Power Mode: Speed Range 1-4) 427in³
Displacement (Standard Power Mode: Speed Range 1-3*) 427in³
Maximum Net Torque - ISO 9249:2007 (Performance Power Mode: Range 1-4) 650ft·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 (Standard Power Mode: Range 1-3*) 628ft·lbf
Maximum Gross Power - 1,600 rpm - ISO 14396 (DIN) (Standard Power Mode: Range 1-3*) 176mhp
Maximum Gross Power - 1,800 rpm - ISO 14396 (DIN) (Performance Power Mode: Range 1-4) 190mhp
Maximum Gross Power - 1,600 rpm - ISO 14396 (Standard Power Mode: Range 1-3*) 173HP

Weights

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Operating Weight 35778lb

Buckets

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Bucket Capacities 2.5-5.0 m³ (3.2-6.5 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)

Cab

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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.

Loader Hydraulic System

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

Sound

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

Steering

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

Tires

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Note (3) Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model.
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 (2) In certain applications, the loader’s productive capabilities may exceed the tire’s tonnes-km/h (ton-mph) capabilities.
Standard Size 20.5 R25, radial (L-3)
Note (1) Other tire choices are available. Contact your Cat dealer for details.

Axles

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

Service Refill Capacities

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Front Axles 9.2gal (US)
Rear Axles 9.2gal (US)
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

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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).

Air Conditioning System

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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.