TM 55-2840-231-23
8-8. External Oil Check Valve - Removal, Cleaning, Inspection and Installation - Continued
ENGINE/-Continued
3. Inspection
Replace the valve if it is
not within the following
limits:
a. Cracking pressure:
5 ± 1 (0.35 + 0.07 kg/sq
cm) psi.
b. Leakage (internal): 10
drops per minute max at
3 psi (0.21 kg/sq cm).
c. Leakage (external):
None allowed. If external
leakage is encountered,
reject valve.
Be sure the check valve is
installed with the hex end
marked “OUT” and the arrow
pointing toward the rear of the
engine.
4. Installation
a. Install the check valve
(4) in the pressure oil
tube with the hex end
marked “OUT” and the
arrow pointing towards
the rear of the engine,
Tighten the coupling nuts
to 80-120 in. lb (0.9- 1.4
kg/m).
b. Configuration B only
- secure clamps (7 and 8)
together with bolt (6) and
nut (9). Tighten the nut to
35-40 in. lb (0.4-0.5 kg/
m).
c. Secure clamps (2 and 3)
together with bolt (1) and
nut (5). Tighten the nut to
35-40 in. lb (0.4-0.5 kg/
m).
Change 11
8-13
