FIRE PUMP - Continued
This task covers
Volute Body Removed
Shop Equipment, Automotive
(see para. 2-13.3)
Maintenance and Repair,
(see para. 2-13.4)
Carbon Seal and Sealing Assembly Removed
(see para. 2-13.5)
Fire Pump Removed from Truck
(see TM 5-4210-220-12)
UMP 6538 Gasket
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.
Use a marker to mark the pump head and
housing for easier installment.
Remove the six nuts (1) and lockwashers
(2) that retain the pump head (3) to the
bearing housing (4).
Remove the disengaging plunger pipe. See
para. 2-13.11 steps 4 and 6.
Using a soft faced hammer, progressively
tap around the circumference of the pump
head (3) until it separates from the bearing
Examine pump head (3) and bearing
housing (4) for cracks, excessive corrosion,
or warped mating surfaces. Replace as
To remove the seal housing (7), remove the
six capscrews (9) and washers (8).
Separate seal housing (7) from pump head
(3). Remove and discard gasket (6).
Remove water flinger (10) from pump shaft.
To assemble pump head, first install the
water flinger (10).
(10) Install new gasket (6) onto seal housing (7).