TM 1-1740-204-13&P
3-25.1. REMOVAL
WARNING
Remove or disconnect nitrogen tanks before maintenance. Never disconnect a pressurized line.
CAUTION
When removing or tightening a fitting to the high pressure filter, hold the filter body hex with a
wrench adjacent the fitting. Tightening the filter across its body may stress the filter housing
and cause leaks to develop. Extreme caution should be used to prevent contaminants such as
old Teflon tape, sealant, dirt or any other matter from falling into the tubing going to the booster
pump. This will cause booster pump failure.
a.
Verify that the valves on both nitrogen supply tanks are shut off. Remove both connectors (1) and (2) of the tank
connector assembly (3) from the nitrogen supply tanks. Use the filter body hex adjacent the fitting for loosening.
b.
Disconnect the tank connector assembly (3) from the booster panel (4) at the high pressure filter (5) by loosening
the fitting and removing the entire assembly.
c.
Remove the high pressure filter (5) with a wrench and observing the caution regarding the use of the hex on the
filter adjacent the fitting.
3-25.2. FILTER INSPECTION PROCEDURE After removing high pressure filter (5), tap the inlet end on a solid surface.
If any particles or contaminants are visible, replace the filter with a new one.
3-25.3. INSTALLATION
a.
Using Teflon tape (D1) or sealant (D2), install high pressure filter (5) while observing the caution note. The
direction of the arrow on the filter MUST be pointed toward the booster pump. Using Teflon tape (D1) or sealant
(D2), install the tank connector assembly (3) to the high pressure filter (5). Use the filter body hex adjacent the
fitting for tightening.
b.
Connect the two tank connectors (1) and (2) to the nitrogen supply tanks.
c.
Perform leak check and confidence test procedure per paragraph 2-8.
END OF TASK
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