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  Wheel Loaders

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Caterpillar 938K Specifications

The Cat 938K wheel loader is powered by 402.8 cu.in (6.6L) Caterpillar C6.6 ACERT 6-cylinder turbocharged aftercooled diesel engine with a rated power of 169 hp (126 kW) at 1800 rpm. The Caterpillar 938K is equipped with a 4-range hydrostatic transmission, power steering system, wet disc brakes, and 20.5R25 standard tires. The hydraulic system has a pump with fluid flow rate of 50 gpm (190 lpm). The hydraulic pressure is 4060 psi (280 bar). The wheel loader has a rated operating capacity of 10500 lbs (4765 kg) and tipping load of 21000 lbs (9530 kg). The max lift height is 156.3 inches (3970 mm) to hinge pin, and boom breakout force is 28500 lbs (12955 kg).

Engine Model .................... Caterpillar C6.6 ACERT
Engine Type .................... 4-Cycle vertical liquid-cooled diesel
Number of Cylinders .................... 6, in-line
Displacement, cu.in (L) .................... 402.8 (6.6)
Cylinder Bore, in (mm) .................... 4.13 (105.0)
Piston Stroke, in (mm) .................... 5.00 (127.0)
Aspiration Type .................... Turbocharged aftercooled
Rated Engine Power, Hp (kW) .................... 169.0 (126.0)
Rated Engine Speed, rpm .................... 1800
Maximum Torque, Nm (ft-lb) .................... 802 (591)
Torque Speed, rpm .................... 1400
Compression Ratio .................... 16.5:1
Firing Order .................... 1-5-3-6-2-4
Combustion System .................... Direct injection
Fuel System .................... Common rail fuel injection
Air Cleaner Type .................... Dry dual element
Lubrication System .................... Full pressure
Cooling System .................... Liquid-cooled
Emission Level .................... Tier 4 Interim
Fuel Tank Capacity, gal (L) .................... 51.5 (195.0)
Oil Capacity, qts (L) .................... 21.0 (20.0)
Coolant Capacity, qts (L) .................... 33.6 (32.0)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 115

Transmission Type .................... Hydrostatic, four-range
Number of Forward Gears .................... 4
Number of Reverse Gears .................... 4
Maximum Speed (Range 1), mph (kph) .................... 0.6-8.0 (1.0-12.9)
Maximum Speed (Range 2), mph (kph) .................... 8.0 (12.9)
Maximum Speed (Range 3), mph (kph) .................... 17.0 (27.3)
Maximum Speed (Range 4), mph (kph) .................... 25.0 (40.0)

Drive System Type .................... Four-wheel drive (4WD)
Steering Configuration .................... Articulated frame
Steering System .................... Hydrostatic power
Service Brakes Type .................... Hydraulic wet disc
Front Tire Size (Std) .................... 20.5R25
Rear Tire Size (Std) .................... 20.5R25
Front Tire Size (Opt) .................... 650/65R25
Rear Tire Size (Opt) .................... 650/65R25

Hydraulic System Type .................... Closed center
Hydraulic Pump Type .................... Variable displacement, piston
Pump Flow, gpm (Lpm) .................... 50.0 (190.0)
System Pressure, psi (Bar) .................... 4060 (280)
Hydraulic Tank Capacity, gal (L) .................... 23.8 (90.0)
Hydraulic System Capacity, gal (L) .................... 44.9 (170.0)

Rated Operating Capacity (Straight, Std Lift), lbs (kg) .................... 12350 (5605)
Rated Operating Capacity (Full Turn, Std Lift), lbs (kg) .................... 10500 (4765)
Tipping Load (Straight, Std Lift), lbs (kg) .................... 24700 (11210)
Tipping Load (Full Turn, Std Lift), lbs (kg) .................... 21000 (9530)
Breakout Force (Std Lift), lbs (kg) .................... 28500 (12955)

Maximum Working Height (Std Lift), in (mm) .................... 207.7 (5275)
Maximum Working Height (High Lift), in (mm) .................... 230.5 (5855)
Maximum Lift Height To Hinge Pin (Std Lift), in (mm) .................... 156.3 (3970)
Maximum Lift Height To Hinge Pin (High Lift), in (mm) .................... 179.2 (4550)
Height To Top Of Cab, in (mm) .................... 131.5 (3340)
Length With Bucket On Ground (Std Lift), in (mm) .................... 301.4 (7655)
Length With Bucket On Ground (High Lift), in (mm) .................... 330.5 (8395)
Width (Tread Center), in (mm) .................... 81.3 (2065)
Width (Over Tires), in (mm) .................... 105.3 (2675)
Wheel Base, in (mm) .................... 120.1 (3050)
Ground Clearance, in (mm) .................... 15.1 (385)
Departure Angle, deg .................... 33
Articulation Angle, deg .................... 40
Bucket Width, in (mm) .................... 108 (2750)
Bucket Capacity, cu.ft (m3) .................... 88.3 (2.50)
Digging Depth (Std Lift), in (mm) .................... 3.9 (101)
Digging Depth (High Lift), in (mm) .................... 5.3 (135)
Rollback Angle At Full Height (Std Lift), deg .................... 54
Rollback Angle At Full Height (High Lift), deg .................... 53
Dump Angle At Full Height (Std Lift), deg .................... 49
Dump Angle At Full Height (High Lift), deg .................... 47
Clearance With Bucket Dumped (Std Lift), in (mm) .................... 111.6 (2835)
Clearance With Bucket Dumped (High Lift), in (mm) .................... 134.4 (3415)
Reach At Full Height (Std Lift), in (mm) .................... 45.1 (1145)
Reach At Full Height (High Lift), in (mm) .................... 55.7 (1415)
Turning Radius (w/Bucket, Std Lift), in (mm) .................... 241.5 (6135)
Turning Radius (w/Bucket, High Lift), in (mm) .................... 255.5 (6490)
Turning Radius (Inside Tires), in (mm) .................... 112.2 (2850)
Operating Weight (Std Lift), lbs (kg) .................... 35100 (15930)
Operating Weight (High Lift), lbs (kg) .................... 35650 (16180)

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