TM 10-4520-259-13&P
4-22. UPPER AND LOWER MANIFOLD ASSEMBLY
This task covers:
a.
Inspect
c.
Repair
b.
Remove
d.
Install
INITIAL SETUP:
Tools:
Tool Set, General (Item 1, Appendix B)
Tool Set, Common No. 1 (Item 3, Appendix B)
Materials/Parts:
WARNING
Rags, Wiping (Item 15, Appendix F)
Disconnect power.
Sealer (Item 13, Appendix F)
Equipment Condition:
Water heater shut off and cooled down.
Power switch off and power cable disconnected.
INSPECT
Inspect the upper and lower manifold assemblies for leaks, corrosion, damage, or loose components.
REMOVE
Remove faulty manifold assembly components as follows:
WARNING
Hot water under pressure is present in the water heater. Do not attempt to work on the
plumbing until the water heater is cooled down
a. (M-80)
Unscrew coupling (1) from bushing (2).
b. Unscrew bushing (2) and valve (3) from upper manifold (10).
c. Unscrew vent valve (4) and coupling (5) from upper manifold (10).
d. Unscrew overflow tube fitting (6) and clamp (12) from elbow (7). Remove overflow tube (13).
Change 2 4-51
