TM 5-4310-362-14
4. COMPRESSOR. Dual stage, two or three piston, air cooled with 175 cfm capacity. Includes intercooler, aftercooler
and air inlet filter. Model 20-904 has centrifugal unloader and Model 20-911 has pressure switch unloader for no load
starting.
5. ELECTRIC MOTOR. Single phase 2 HP induction motor.
6. AIR RECEIVER. Consists of 40 gal. air tank, check valve to prevent escape of air back to compressor, pressure
gage, drain cock, safety relief valve and globe shutoff valve at the outlet.
7. AIR DISCHARGE SYSTEM. Consists of air hose and inflator gage which permits simultaneous filling of tires and
reading of pressure.
1-7.
EQUIPMENT DATA
1.7.1 DIFFERENCES BETWEEN MODELS.
This manual covers models 20904 and 20911 air compressors
manufactured by C and H Distributors. See below for equipment data and differences.
Air Compressor Unit
Model 20-904
Model 20-911
Manufacturer .......................................C&H Distributors Inc....................................C& H Distributors Inc.
Output .................................................5 cfm at 175 psi .........................................5 cfm at 175 psi
Type ...................................................Electric motor driven, tank mounted ............Electric motor driven, tank mounted
Length..................................................56 in. (142 cm) ..........................................56 in. (142 cm)
Width ..................................................25 in. (64 cm) ............................................25 in. (64 cm)
Height .................................................40 in. (102 cm)...........................................37 in. (95 cm)
Weight, net ..........................................460 lbs. (209 kg) ........................................460 lbs. (209 kg)
With, shipping ......................................565 Ibs. (257 kg) ........................................565 Ibs. (257 kg)
Air Compressor.....................................Model 20-904 .............................................Model 20-911
Manufacturer .......................................Champion...................................................Champion
Type ...................................................2 stage vertical ..........................................2 stage W
Bore and Stroke
Model 20904
Model 20-911
Low pressure stage
3.0 in. x 2.0 in.
2.6 in. x 2.0 in.
(7.6 cm x 6.1 cm)
(6.6 cm x 6.1 cm)
High pressure stage
1.5 in. x 2.0 in.
1.75 in. x 2.0 in.
(3.8 cm x 5.1 cm)
(4.5 cm x 5.1 cm)
Pumping rate
5 cfm at 175 psi
5 cfm at 175 psi
Air cleaner
dry element type
washable type
Electric Motor
Manufacturer ..........................................................................................................Leeson Electric Corporation
Model ....................................................................................................................................... N182C17DB1A
RPM ........................................................................................................................................................ 1740
Horsepower ................................................................................................................................................... 2
Input requirements .......................................................................................................................... 115V, 6 Hz
Full load current ..................................................................................................................................27.0 Amp
Phase .....................................................................................................................................................Single
Service factor ........................................................................................................................................... 1.15
Duty ................................................................................................................................................ Continuous
Change 1 1-3
