CAUTION
The intercooler pop-off valve is per-
manently set at 70 psi and should never
be tampered with, nor the setting
c h a n g e d . The popping of this valve
generally indicates improper func-
tioning o f e i t h e r t h e s u c t i o n o r
discharge valve in the high-pressure
position.
c. Installation. Install the intercooler pop-off
valve as illustrated in figure 4-12.
a. Removal Remove the air receiver tank pop-off
valve as illustrated in figure 4-13.
NOTE
No further disassembly is required for cleaning.
b. Cleaning and Inspection.
(1) Clean all parts with cleaning solvent and
dry thoroughly.
(2) .Inspect for defects and replace a defective
pop-off valve, as necessary.
c. Installation. Install the air receiver tank pop-
off valve as illustrated in figure 4-13.
d. Adjustment. Turn valve clockwise to raise
pop-off valve pressure and counterclockwise to
lower pop-off valve pressure.
installation.
Section XI. MAINTENANCE OF DYNAMOTOR-WELDER
4-36. General
a. Remoual Remove the ventilating air filters as
illustrated in figure 4-14.
The dynamotor-welder and control cubicle com-
b. Cleaning and Inspection.
prise a unit capable of producing 12 KW of power
(1) Clean the air filters with cleaning solvent
for D.C. welding; and producing 12 KW of A.C. 3-
and blow dry with low-pressure compressed air.
phase, 60-cycle, power at 0.8 power factor when
driven by either the shop set engine or energized by
(2) Inspect filters for breaks, holes, cracks,
and other defects and replace a defective filter.
external power. All power received by the various
(3) Inspect filter gasket for defects and replace
components and outlets of the shop set, with the
if defective.
exception of the 24-volt D.C. system, is received
c. Installation. Install the ventilating air filters as
from, and controlled by, the control cubicle.
illustrated in figure 4-14.
