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TM 5-4210-220-34
2-13.
FIRE PUMP - Continued
2-13.3
Volute Body.
This task covers Repair
TOOLS
MATERIALS/PARTS
Shop Equipment, Automotive
21, Appendix B Petroleum Jelly
Maintenance and Repair,
UFP 2295/2 Gasket
NSN 4910-00-754-0705
EQUIPMENT CONDITION
Fire Pump Removed for Truck
(see TM 5-4210-220-12)
Pump is made of aluminum alloy. Sealing surface 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
The volute body can be removed from the fire pump without removing the wearing ring.
The following procedure describes volute body removal as a complete sub-assembly. This will allow direct access to the
impeller, pump head, carbon seal assembly, and bearing housing.
(1)
Remove primer valve as detailed in para. 2-13.10.
(2) Remove 16 capscrews (1) and seal washers (2) securing the volute body (3) to the pump head (4). Remove
volute body and gasket (5). Discard gasket.
(3)
Inspect seal washers for deterioration of rubber face. Replace as necessary.
(4)
Inspect volute body (3) and pump head (4) for cracks, corrosion or warped flanges. Replace as necessary.
Remove old gasket and clean surface.
(5)
Install a locating stud in the volute body (3) as shown. This will help to aline volute body during installation.
(6)
Apply a continuous bead of petroleum jelly (item 21, Appendix B) to both sides of new gasket (5).
(7)
Aline gasket (5) with locating stud and stick to volute body (3) flange.
(8)
Aline volute body (3) with pump head (4) and bring together.
2-96
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