ASSOCIATED COMPONENTS. Refer to Section VI for the details of the following
components:
Drivcr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Electric
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Electric
Air Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Square D
First Stage Safety Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .KunkleValve
Second Stage Safety Valve... . . . . . . . . . . . . . . . .
. . . . . . .Kunkle Valve
1-4.
WEIGHTS.
Controller, Lb (Pound) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Recievcr, Lb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .360
Motor, Lb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
Compressor -Dry, Lb....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.170
1-5.
OVERALL DIMENSIONS.
Width, In. (Inches) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...24.5
Height. In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...41.0
Length, In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...63.0
1-6. DESCRIPTION OF COMPONETS
1-7.
GENERAL DESCRIPTION. The Model 242 D7-1/2 Air Compressor described by this
manual is a two stage. air cooled reciprocating air compressor, capable of continuous opera-
tion at a rated capacity of 15 CFM at a discharge pressure of 175 PSIG when operating at a
speed of 1040 RPM. The Model 242 D7-1/2 Air Compressors compact package consisting
of several major components. These components are as follows: Model 242 Compressor,
induction motor with magnetic controller, belt guard assembly, receiver, and an air hose
assembly with inflator gauge. Refer to Figures 1-1 and 1-2.
1-8.
MODEL 242 COMPRESSOR. The Model 242 Compressor (Figure 1-3) is a 2-3/4-inch
stroke, two cylinder, single acting, air cooled compressor. The cylinder bore diameter of
the first stage cylinder is 4 inches and that of the second stage cylinder is 2-1/2 inches. The
compressor assembly comprises a totally enclosed crankcase which supports a counter-
weighted crankshaft and a balanced fan-type flywheel, an oil f'iller, a pilot valve and centrif-
ugal unloader, two compressing cylinders, an intercooler assembly and an aftercooler assem-
bly. The crankcase also serves as a sump for the lubricating oil. The crankshaft supports
