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TM 5-3825-220-13&P
6-3.6 Quick Disconnect Camlock Couplings
a.
Quick disconnect couplings are found throughout the system and are part of all hoselines under 6-inch diameter.
A generic quick disconnect coupling is shown in Fig. 6-10.
b.
Preventative maintenance practice includes:
"D"
1. Check all quick disconnect couplings for leakage. Check that cam arms are in closed position. If cam arms
are not closed, close them. If leakage is evident, initiate and schedule corrective maintenance.
"W"
2. Clean dirt off unit.
6-3.7 Grooved Couplings
a.
Grooved couplings are used in numerous positions throughout the facility as described in Chapter 2. Pipe,
fittings and the adapters on 6-inch hose are double grooved. The grooving matches the grooving shown on Fig. 6-14.
The coupling clamps used within the TPT are single grooved but fit the first groove from the end of the double grooved
pipe and fittings. The coupling clamps used in the switching manifold are double grooved. Double grooved coupling
clamps are used in the aluminum piping system only and are Government furnished equipment. While double grooved
clamps and single grooved clamps are dimensionally interchangeable within the TPT, it is preferred that single groove
clamps be used to reduce weight and enhance operating and maintenance convenience. Information on grooved
couplings is found in Fig.s 2-37A, 2-37B, 2-37C and 2-59 in Chapter 2. Illustrations for the convenience of maintenance
are shown in Fig. 6-11 and 6-12.
b.
Preventative maintenance practice includes:
"D"
1. Check all grooved couplings for leakage. If leakage exists, initiate and schedule corrective maintenance
unless such leakage is corrected in "2" below.
"D"
2. Check that coupling clamp handles are fully closed. If not, close them.
"W"
3. Clean off coupling assembly routinely.
6-3.8 Aluminum Pipe
a.
The switching manifold contains 6-inch aluminum pipe with double grooved ends. The pipe is described
technically in para. 2-5.2 and Fig. 2-37A. For the convenience of maintenance, Fig. 6-14 showing the double grooved
end is included.
b.
Preventative maintenance practice includes:
"W"
1. Inspect each section of pipe routinely. Observe the following:
a.
Any deformation or dents.
b.
Corrosion pitting, particularly near the couplings or other ferrous metal. Report any faults found and initiate
corrective maintenance.
6-9
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