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TM 5-3825-220-13&P
6-4.9 Grooved Coupling Clamps - Cont'd
1.
If a coupling is leaking and the clamp is fully closed, it should be opened and inspected. Generally, if the
clamp is not damaged, an adjustment to or replacement of the gasket will correct the problem.
2.
If the clamp is damaged or worn and thus not functioning, it should be replaced.
3.
The damaged or worn clamp can be repaired in a qualified and properly equipped shop as follows:
a)
If a key (the projection that fits into the grooves) has a burr that prevents the clamp from closing in
the groove, it may be filed or ground off.
b)
If the pins are worn, they should be replaced.
c)
If the handle is bent or distorted, it should be replaced.
d)
If a key is broken or the clamp body is distorted, the clamp should be passed thru established
maintenance channels for disposition.
6-4.10 Hoseline Swivels
a.
Swivels are provided with the transfer hoselines to minimize twisting action on the hose. Information on the
swivels is found on Fig. 2-31 and 6-9. The swivels are not designed to rotate easily, particularly in the unpressurized
condition. They must, however, rotate if hose twisting is to be avoided.
b.
If the swivels are not turning, they require corrective maintenance. The swivel is dissassembled as shown in Fig.
6-9. Possible causes and corrective actions are as follows:
1.
Dry bearing- Clean, inspect, and repack with light grease.
2.
Interference and galling - Inspect and note any galled surfaces. Dress with emery cloth, clean, lubricate
and reassemble.
3.
Missing or worn ball bearings - Inspect, replace all ball bearings, lubricate and reassemble.
4.
Swivel leaking - Inspect and replace O-rings.
5.
Leakage at couplings - Inspect and handle as in para. 6-4.9.
6-4.11 Aluminum Pipe
a.
Six (6) inch aluminum pipe is Government furnished. The pipe is described in para. 2-5.2 and on Fig. 2-37A.
For the convenience of maintenance, appropriate information is shown on Fig. 6-14.
b.
Recommended corrective maintenance actions are:
6-18
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