Wheel Loaders

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938M Wheel Loader

Overview
Specifications
Equipment

Product Description

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 engine works in concert with an intelligent hystat power train to deliver fuel efficiency as standard. Meets U.S. EPA Tier 4 Final/EU 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.

Product Specifications

UnitsUSMetric

 

Engine
Engine Model
Cat® C7.1
Maximum Rated Gross Power - ISO 14396
188 HP 140 kW
Maximum Rated Gross Power - ISO 14396 (DIN)
190 HP 140 kW
Maximum Rated Gross Power - ISO 14396 (DIN) (Performance Power Mode: Range 1-4)
190 HP 140 kW
Maximum Rated Gross Power - ISO 14396 (Performance Power Mode: Range 1-4)
188 HP 140 kW
Maximum Rated Gross Power - Maximum Engine Speed (Performance Power Mode: Range 1-4)
1800 r/min 1800 r/min
Rated Net Power
182 HP 136 kW
Rated Net Power - 1,800 rpm - ISO 9249 (1977)/EEC 80/1269 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
184 HP 137 kW
Rated Net Power - 1,800 rpm - SAE J1349 at Minimum Fan Speed (Performance Power Mode: Range 1-4)
182 HP 136 kW
Buckets
Bucket Capacities
2.5-5.0 m3 (3.3-6.5 yd3)
Weights
Operating Weight
36216 lb 16427 kg
Engine
Maximum Gross Power
188 HP 140 kW
Bore
4 in 105 mm
Stroke
5 in 135 mm
Displacement
427 in³ 7.01 l
Cab
ROPS
ISO 3471: 2008
FOPS
ISO 3449: 2005 LEVEL II
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.
Cab
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.
Engine
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 879 N·m
Maximum Gross Torque - ISO 14396 (Standard Power Mode: Range 1-3*)
648 lb/ft 879 N·m
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Performance Power Mode: Range 1-4)
628 lb/ft 852 N·m
Maximum Net Torque - ISO 9249 (1977)/EEC 80/1269 (Standard Power Mode: Range 1-3*)
628 lb/ft 852 N·m
Maximum Net Torque - SAE J1349 (Performance Power Mode: Range 1-4)
621 lb/ft 843 N·m
Maximum Net Torque - SAE J1349 (Standard Power Mode: Range 1-3*)
621 lb/ft 843 N·m
Maximum Rated Gross Power - ISO 14396 (DIN) (Standard Power Mode: Range 1-3*)
175 HP 129 kW
Maximum Rated Gross Power - ISO 14396 (Standard Power Mode: Range 1-3*)
173 HP 129 kW
Maximum Rated Gross Power - Maximum Engine Speed (Standard Power Mode: Range 1-3*)
1600 r/min 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 126 kW
Rated Net Power - 1,600 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
171 HP 126 kW
Rated Net Power - 1,600 rpm - SAE J1349 at Minimum Fan Speed (Standard Power Mode: Range 1-3*)
168 HP 125 kW
Rated Net Power - 1,800 rpm - ISO 9249 (DIN) at Minimum Fan Speed (Performance Power Mode: Range 1-4)
186 HP 137 kW
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 120 mm
Lift Cylinder, Double Acting - Rod Diameter
2.6 in 65 mm
Lift Cylinder, Double Acting - Stroke
31.1 in 789 mm
Maximum Flow - Implement Pump
50 gal/min 190 l/min
Maximum Flow - Implement Pump - 3rd Function*
50 gal/min 190 l/min
Maximum Flow - Implement Pump - 4th Function Maximum Flow*
42 gal/min 160 l/min
Maximum Working Pressure - Implement Pump
4061 psi 28000 kPa
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 30000 kPa
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Maximum Working Pressure
4061 psi 28000 kPa
Relief Pressure - Tilt Cylinder - 3rd and 4th Function Relief Pressure
4351 psi 30000 kPa
Tilt Cylinder, Double Acting - Bore Diameter
5.9 in 150 mm
Tilt Cylinder, Double Acting - Rod Diameter
3.5 in 90 mm
Tilt Cylinder, Double Acting - Stroke
21.9 in 555 mm
Operating Specifications
Full Turn Tip Load
22107 lb 10028 kg
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) 32 l
Diesel Exhaust Fluid (DEF) Tank
5 gal (US) 19 l
Engine Crankcase
5.3 gal (US) 20 l
Front Axles
9.2 gal (US) 35 l
Fuel Tank
51.5 gal (US) 195 l
Hydraulic System - Including Tank
44.9 gal (US) 170 l
Hydraulic Tank
23.8 gal (US) 90 l
Rear Axles
9.2 gal (US) 35 l
Transmission - Gear Box
2.9 gal (US) 11 l
Steering
Maximum Flow - Steering Pump
34 gal/min 130 l/min
Maximum Steering Torque - 0° (Straight Machine)
42506 lb/ft 57630 N·m
Maximum Steering Torque - 40° (Full Turn)
31398 lb/ft 42570 N·m
Maximum Working Pressure - Steering Pump
3500 psi 24130 kPa
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 2.3 s
Steering Cycle Times - Full Left to Full Right - Minimum RPM: Pump Flow Limited
3.1 s 3.1 s
Steering Cylinder, Double Acting - Bore Diameter
3.1 in 80 mm
Steering Cylinder, Double Acting - Rod Diameter
2 in 50 mm
Steering Cylinder, Double Acting - Stroke
15.7 in 399 mm
Transmission
Forward and Reverse - Range 1*
1-13 km/h (0.6-8 mph)
Forward and Reverse - Range 2
8 mile/h 13 km/h
Forward and Reverse - Range 3
17 mile/h 27 km/h
Forward and Reverse - Range 4
25 mile/h 40 km/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).
Units:USMetric
Standard Equipment
POWER TRAIN
HYDRAULICS
ELECTRICAL
OPERATOR ENVIRONMENT
OTHER STANDARD EQUIPMENT
Optional Equipment
OPTIONAL EQUIPMENT

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