TM 10-4610-237-12
3.5
QUICK DISCONNECT COUPLING REPAIR.
The following instructions are applicable to both female quick disconnect couplings and caps.
This task consists of:
a. Removal
b. Installation
INITIAL SET-UP:
Equipment Condition:
Water system shut down (para. 2.9d)
General Safety Instructions:
WARNING
To prevent injury to personnel, the water pump must
be shut down and water pressure relieved from
discharge hoses before disconnecting couplings. Cap
all open couplings to prevent water system
contamination.
Materials Required:
Wiping Rag (Item 2, App. E) Determine gaskets
required from the following table:
Coupling Size
Gasket
1 1/2-inch
(Item 1, App. I)
2-inch
(Item 2, App. I)
4-inch
(Item 3, App. I)
NOTES
Repair of a typical 4-inch female coupling and cap is shown. Repair of 2-inch and 1 1/2-inch
couplings and caps is similar.
Replacement gaskets are supplied in the accessory kit.
a.
Removal. Refer to Figure 3-2.
(1
Disconnect female coupling (1) from water system (para. 2.7c).
(2)
Pull gasket (2) from interior of female coupling (1).
b.
Installation. Refer to Figure 3-2.
(1)
Using clean wiping rag, remove grit, sand, and dirt from gasket seat inside female coupling (1).
(2)
Position replacement gasket (2) in female coupling (1).
(3)
Press gasket (2) into gasket seat inside female coupling (1). There will be no ripples or bumps in
gasket material when gasket is properly installed.
(4)
Connect coupling (1) to water system (para. 2.7c).
(5)
Start up water system (para. 2.9c) and test coupling (1) for leaks.
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