TM 5-3810-307-24-1-2
Inspect for Reuse (012-013-007)
Use a valve spring tester to check the unloader spring.
Refer to the Compressor Spring Force Specifications
chart shown in Section V.
Replace the unloader spring if it does not meet the
specifications shown, or the wrong spring has been
used.
NOTE
For Holset two cylinder air compressors
check both cylinder and center unloader
springs.
New springs shall be installed
during rebuild.
NOTE
If the compressor has a flat hat type
unloader cap (1), it must use an unloader
spring and valve seat different than that used
with the three prong unloader.
Install (012-013-026)
Holset QE Models
Install the new rectangular vee seal into the unloader
body.
NOTE
The seal must be installed with the grooved
side up.
Liberally lubricate the unloader valve bore above and
below the rectangular ring seal with high temperature
grease. (Accrolube Lubrication Teflon Grease or
equivalent.)
Install a new o-ring seal on the unloader valve body.
12-14 Change-1