TM 10-4330-237-13&P
b. Installation of Inlet and Outlet Lines. (Figure 4-12.)
(1)
Clean threads of the flare nuts (5), differential pressure gauge (6) and the inlet and outlet ports (7,8).
(2)
Position the inlet line (9) and/or outlet line (10) and loosely attach flare nuts (5).
(3)
Tighten flare nuts (5) on each side of the differential pressure gauge (6) and on the inlet and outlet port
connectors (7,8).
(4)
Close the manual vent valve (2).
(5)
Install filter vessel gravity drain plug (4).
(6)
Place grounding cable (1) in storage location.
c. Removal of Differential Pressure Gauge. (Figure 4-12.)
(1)
Connect the liquid fuel filter-separator grounding cable (1) to a ground rod.
(2)
Depress and latch open the manual vent valve (2) to relieve any pressure from filter vessel (3).
(3)
Loosen and separate flare nuts (5) on differential pressure gauge (6) inlet and outlet lines (9,10).
(4)
Loosen and remove the two screws (11), lock washers (12) and flat washers (13) that secure differential pressure
gauge (6) to filter vessel (3). Discard the lock washers (12).
NOTE
The flared tube connectors on the inlet and outlet of the differential pressure
gauge (6) may be removed by holding the gauge body with an adjustable wrench.
If the gauge inlet or outlet port turns, it will be necessary to hold the port(s) with
slip joint pliers to remove the connector(s). Damage to the ports is acceptable
since the replacement differential pressure gauge (6) is supplied with new ports.
(5)
Remove the threaded flared tube elbow (14) from the inlet side of the differential pressure gauge (6). Retain
elbow for use on differential pressure gauge (6).
(6)
Remove the threaded flared tube connector (15) from the outlet side of the differential pressure gauge. Retain
connector for use on differential pressure gauge (6).
d. Installation of Differential Pressure Gauge. (Figure 4-12)
(1)
Clean the threads on the elbow (14) and connector (15) retained from the removal procedure.
(2)
Apply a light, even coat of thread sealant to the elbow (14) and connector (15) threads and install on the
differential pressure gauge (6).
(3)
Position differential pressure gauge (6) on mount, and loosely install the two screws (11), lock washers (12) and
flat washers (13) that secure the differential pressure gauge (6) to filter vessel (3).
(4)
Clean threads on inlet and outlet line (9,10) fittings (5), apply a light, even coat of thread sealant and install the
inlet and outlet lines (9,10) finger tight to the differential pressure gauge (6).
(5)
Install the two screws (11) that secure the differential pressure gauge (6) to the filter vessel (3).
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