TM 9-4940-568-34
8-20
8-2. AIR COMPRESSOR REPAIR (CONT).
NOTE
To adjust pilot valve, preform the
following procedures.
(29)
Remove the pilot valve tube and the tube
fittings.
(30)
Remove the pilot valve body and all
existing shims.
(31)
Screw the pilot valve body back into the
frame end cover (without any shims) until
contact with the thrust pin is felt. Advance
the pilot valve body 1/4 to 1/2 turn more.
NOTE
If contact with the thrust pin
cannot be felt, the following steps
may be necessary to locate the
contact pin.
(32)
Insert a small instrument (Punch, rod, nail,
etc.) into the end of the pilot valve until it
contacts the valve stem.
(33)
While inserted in the pilot valve, make a
mark on the instrument even with the
outside edge of the pilot valve body.
(34)
Keeping the instrument pressed lightly
against the valve stem, screw the pilot
valve body into the frame end cover. When
the mark on the instrument starts moving
out away from the edge of the pilot valve
body, contact has been made with the thrust
pin.
