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 TM 55-1905-223-24-10
f.
Remove threaded plug (22), preformed packing (23), spring (22), and rubber ball (12) from pump valve cavity in
base (20).
g. Insert (25) is permanently bonded into the valve cavity in base (20). It retains the spring (26) and intake ball
(27). These items are NOT to be removed.
h. Remove adapter (16), packing (18), shuttle valve (19), and packing (18) from shuttle valve cavity in base (20).
Remove packing (17) from adapter (16). Discard packings.
REPAIR
a. Wash all metal parts in cleaning solvent, being especially thorough with the ports and passages of the base (20).
b. Inspect all packing grooves and mating surfaces for severe wear or other damage. Any metal parts showing
severe wear should be replaced. Severe wear is in excess of 5.0% of total area of part being repaired or
replaced.
NOTE
Prior to assembly packing, pistons and shuttle valve should be coated with clean
system oil.
ASSEMBLY
a. Install packing (17) into groove of adapter (16), install packing (18), shuttle valve (19), packing (18) and adapter
(16) into shuttle valve cavity of base (20).
b. Install packing (23) into groove of threaded plug (22), install rubber ball (12), spring (24) and threaded plug (22)
into pressure ball cavity of base.
c. Install packings (11,13,14,15), into grooves of relief valve piston (10).
d. Place spring (8) and threaded plug (7) into relief valve piston (10), press spring p in (9) into cross hole of relief
valve piston (10). Place rubber ball (12) and completed relief valve assembly into relief valve cavity in base (20)
and secure threaded plug (7).
NOTE
An installation device (socket wrench, etc.) which has a flat surface as large as
diameter of preformed packing should be used.
e. Replace encased seal (6) in threaded plug (7).
f.
Press pump piston wiper (30) into counterbored hole in piston cavity of base (20).
4-25
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