TM 5-4310-275-14
PNEUMATIC SYSTEM REPAIR INSTRUCTIONS
Section 1. VALVE ASSEMBLIES
b. Removal. Remove pressure relief valve
6-1. General
This chapter contains the repairable assemblies
c. Disassembly.
used in the pneumatic system. They are the
(1) Cut safety wire and remove wire and lead
pressure relief valve, check valve, back pressure
seal. Unscrew adjusting screw (2, fig. 6-1 ) and
valve, pneumatic dump valve, and safety fitting
stem (3) from body, (11).
assembly.
(2) Remove spring (4), shims (5), spring
ret ainer (6) and piston assembly (7) from body
a. General. Two pressure relief valves are used
(11).
in the compressor assembly: one valve is installed
NOTE
in the cap of the filter and separator assembly; the
Do not disassemble piston assembly (7). The parts
other is installed in the high pressure line at the
are installed and crimped within the retainer and
cannot be removed without destroying the
pressure tank inlet. The valves exhaust air to
assembly.
atmosphere at a pressure of 3200 to 3500 psig
(224.96 to 246.05 kg per sq cm) and reseal when
(3) Remove metal ball (8, fig. 6-1), ball
air pressure is less than 3100 psig (217.9300 kg
return spring (9) and packing O-ring from body
per sq cm).
(11).
