TM 1-1740-204-13&P
3-16.1. 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.
Remove the Tank Connector Assembly (1) at the High Pressure Filter (2). Loosen tubing flare nuts at (3) and
(4).
b.
Remove bolts (5) and (6) and the tube clamp assemblies (7) and (8). Disconnect the flare fittings at (3) and (4)
and remove the regulator assembly.
NOTE
To remove the shop air regulator (17) only, go to step g; otherwise, proceed.
c.
With the regulator (9) mounted by the rear forged hex (part of the valve body) in a vise with non-marring jaws,
remove low pressure relief valve (10). Remove the assembly (11) using a pipe wrench on the nipple (12) using
care not to damage threads.
d.
Remove the tee subassembly with the High Pressure Filter (2) using a pipe wrench on nipple (13) using care not
to damage threads.
e.
Remove the gauges (14) and (15) from the regulator assembly using open ended wrenches.
f.
Remove retaining wire (16) from the regulator (9) T- handle. Expand the eyelets of the retainer on the T-handle
with a pair of needle nose pliers so that the wire loop can be removed from the retainer; then slip the retainer off
the T-handle. This completes the removal of the low pressure regulator.
g.
To remove the shop air regulator (17), mount the assembly (11) in a non-marring vise by the T-and using a
adjustable wrench, remove the quick disconnect assembly (18) by the elbow.
h.
Unscrew the shop air regulator (17) from the check valve (19).
3-16.2. INSTALLATION
a.
If the shop air regulator (17) was removed, assemble using Teflon tape (D1) or sealant (D2) but do not tighten
the quick disconnect assembly (18) to the shop air regulator (17). Assemble this subassembly to the pipe
threads of check valve (19) using Teflon tape (D1) or sealant (D2).
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