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TM 5-4210-220-34
2-13.
FIRE PUMP - Continued
2-13.7 Water Ring Primer.
This task covers Repair
TOOLS
MATERIALS/PARTS
Shop Equipment, Automotive
3, Appendix B Antiseize Compound
Maintenance and Repair,
21, Appendix B Petroleum Jelly
NSN 4910-00-754-0705
WRP 7953 Gasket
WRP 7954 Gasket
EQUIPMENT CONDITION
WRP 7985 Seal
Fire Pump Removed from Truck
(see TM 5-4210-220-12)
WARNING
To prevent personal injury or premature bearing failure when removing or installing bearing races, always
exert force on the tight ring of the bearing.
Pump is made of aluminum alloy. Sealing surfaces will be damaged if pry bars or wedges are used to
disassemble components. When reassembling, do not force components into position or use fasteners to
bring parts together.
REPAIR
NOTE
Water ring primer can be removed from
fire pump with the fire pump still
mounted in the truck.
If fire pump is not removed from truck, the main engine
and APU must be shutdown, the batteries disconnected,
heat shields removed, and the pump access panels
removed as detailed in TM 5-4210-220-12. The
procedure listed below describes water ring primer repair
with the pump removed.
(1)
To remove the water ring primer, loosen
gear clamps (1) and remove priming hose
(2) from primer.
(2)
Disconnect and remove priming return
spring from back of primer.
(3)
Remove capscrew (5), lockwashers (6) and
locking plate (7).
(4)
Loosen the two locknuts (10) and two
setscrews (11).
(5)
While supporting the water ring primer
assembly (12), tap the fulcrum pin (8) out
of bearing housing (9). Lift the water ring
primer assembly from bearing housing and
place
on
workbench.
2-104
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