TM 10-4930-351-14
0057 00
REMOVAL OF DIFFERENTIAL PRESSURE GAUGE
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 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 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 (6). Retain
connector for use on differential pressure gauge (6).
INSTALLATION OF DIFFERENTIAL PRESSURE GAUGE
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) flare nuts (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).
6.
Tighten the inlet and outlet flare nuts (5).
7.
Close the manual vent valve (2).
8.
Disconnect the grounding cable (1) and place in stowage location.
END OF WORK PACKAGE
0057 00-3/4 blank
