TM 55-1520-240-23-6
7-54.2
INSTALL NO. 1 OR NO. 2 POWER CONTROL MODULE MISCELLANEOUS CHECK
VALVES
(Continued)
7-54.2
2.
Clean area around port (5). Use dry cleaning
solvent (E162). Insert check valve (2) into port
(5). Hand-tighten clockwise until check valve is
seated.
3.
Engage serrations (6) of check valve (2) with
proper combination wrench and drive tool from
table. Tighten check valve to minimum torque.
NOTE
Upon reinstallation of original check
valve, index mark should align.
4.
If serrations of check valve (2) and port (5) do not
align, slowly increase torque toward maximum
value until serrations align. Do not exceed
maximum torque value. Remove combination
wrench and drive tool.
5.
Clean port (5) with solvent. Apply zinc chromate
primer (E291) to port and below check valve
lockring (7), so primer is squeezed out between
the external serrations of lockring and port during
lockring installation.
6.
Install check valve lockring (7) while zinc
chromate primer is still wet. Install combination
wrench on check valve. Tighten combination
wrench until it bottoms on port (5) and seats
the lockring.
NOTE
Any sudden increase in torque
indicates that lockring (7) serrations
and port (5) serrations are not aligned.
7.
Tighten wrench to torque per table. If serrations
cannot be aligned, remove combination wrench
with lockring (7). Repeat step 6.
NO BREAK - WORK HARDER
NO BREAK - WORK HARDER
FOLLOW-ON MAINTENANCE:
Reconnect pipe/hose (Task 7-4).
Perform operational check (TM 55-1520-240-T).
END OF TASK
7-269
