TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 128 of 343
TM 9-2350-358-BD
5-10.
QUICK DISCONNECT LEAK - CONTINUED
•
Knife (found in M2/3 generic BDR kit, Section III, Appendix C)
•
Wrench, adjustable (found in M2/3 generic BDR kit, Section III, Appendix C)
References:
TM 9-2350-314-20-1-1
Other Options:
Replace quick-disconnect with an adapter.
Procedural Steps:
1.
Remove quick-disconnect coupling.
2.
Insert rubber hose and hose clamps in its place.
3.
Check for leaks and bleed fuel line thoroughly.
4.
Record the BDAR action taken.
When the mission is complete, as soon as practical, repair the equipment/system
using standard maintenance procedures.
5-11.
SEALS, FUEL SYSTEM, LEAK
General Information:
O-rings are used to seal the fuel in the lines.
BDAR as well as normal repairs will damage the O-rings.
Fuel absorption
will cause the O-rings to swell causing reinstallation problems since they no longer fit into the O-ring groove.
Some repairs
are possible if the O-ring is damaged.
Swelled O-rings can be allowed to dry until they shrink in size enough to fit.
Torn or
cut O-rings can be replaced using a larger O-ring and cutting it to length.
If an adhesive is available glue the cut ends
together -rings with small cuts can be coated with a silicone gasket sealer to seal the leakage caused by the cut, if it is not
sealing against a moving surface.
See Chapters 3 and 11 also.
5-12.
FITTINGS LEAKING
General Information:
Flared fuel fittings will start to leak because of engine vibrations or overtightening.
Leaking fittings should first be tightened
to attempt stopping the leak.
If tightening does not stop the leak, string can be used to push the flared tubing more firmly
against the connecting surface.
Coating the string with a gasket sealing compound will aid in stopping leaks in a low
pressure fuel line.
5-11
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