c. Installation. Install the intercooler safety
94. Safety Relief Valves
valve (3) in the high-pressure intake manifold
a. Removal (Model OEH-34-60-ENG-1).
(4) by turning the valve clockwise.
(1) Turn off the outside power source.
(2) Release all air from the compressor
by opening the draincock.
a. Removal (Model 0EH-34-60-ENG-1).
(3) Remove the safety relief valve (4, fig.
(1) Remove the safety relief valve (Par.
(4) Remove the bushing (5) from the air
(2) Remove the aftercooler (par. 90).
receiver tank (9).
(3) Remove the check valve (8, fig. 22)
b. Removal (Model LP-512-ENG).
from the pipe nipple and remove the
(1) Stop the engine.
elbow (10) from the check valve.
(2) Release all air from the compressor
(4) Remove the check valve nipple from
by opening the draincock (3, fig. 2).
the pipe tee (6) and remove the tee
(3) Remove the safety relief valve (3, fig.
from the nipple in the air receiver
tank (9).
(4) Remove the bushing from the high
(5) Remove the nipple from the tank.
pressure exhaust manifold (3, fig. 15).
b. Cleaning and Inspection.
c. Cleaning and Inspection.
(1) Clean all parts with an approved
(1) Wipe off the safety relief valve with
cleaning solvent and dry thoroughly.
an approved cleaning solvent, and dry
(2) Inspect for rust, cracks, and torn
thoroughly. Wash the pipe bushing
threads.
with an approved cleaning solvent.
(3) Replace any defective parts.
(2) Inspect the safety relief valve for
c. Installation (Model OEH-34-60-ENG-1).
cracks. The safety relief valve is set
(1) Install the pipe nipple in the air re-
to release at approximately 200 psi.
ceiver tank (9, fig. 22).
Replace a defective safety relief valve.
(2) Install the tee (6) on the nipple.
Inspect the pipe bushing for worn or
(3) Install the check valve nipple in the
damaged threads. Replace a defec-
pipe tee.
tive bushing.
(4) Install the elbow (10) in the check
d. Installation (Model LP-512-ENG).
valve (8) and install the check valve
(1) Install the bushing in the high-pres-
on the pipe nipple.
sure exhaust manifold (3, fig. 15).
(5) Install the aftercooler (par. 90).
(2) Install the safety relief valve (3, fig.
(6) Install the safety relief valve (par.
e. Installation (Model OEH-34-60-ENG-1).
(1) Install the bushing (5, fig. 22) in the
air receiver tank (9).
a. Removal.
(2) Install the safety relief valve (4) in
(1) Turn off the outside power source or
the bushing,
stop the engine.
(2) Release all air from the compressor
by opening the draincock.
M o d e l OEH-34-60-ENG-1)
(3) Release the air pressure gage (6, fig.
a. Removal. Remove the intercooler safety
the bushing from the air receiver
valve (3, fig. 3) from the high-pressure intake
tank.
manifold (4) by turning the valve counterclock-
wise.
b. Cleaning and Inspection.
(1) Clean all metal parts with an ap-
b. Cleaning and Inspection. Wash the inter-
proved cleaning solvent and dry
cooler safety valve with an approved cleaning
thoroughly. Clean the glass on the
solvent. Inspect for cracks in the body of the
gage with solvent and dry with a lint-
valve. Inspect the threads for wear or damage.
free cloth.
Replace a defective intercooler relief valve.
