4-57. PRIMING PUMP-Continued
Before disassembling pump for repairs, be sure to clean its
exterior. Make sure the working space, benches, and tools are
clean. Use only clean, lint free cloths to wipe off components.
Remove two bolts (5).
Remove front head (6).
Remove and discard O-ring (7) and shaft bearing (8).
Remove rotor with shaft assembly (9) and vanes (10). Discard vanes.
Remove and discard shaft bearing (11).
Remove cylinder (12) and shims (13) from rear head (14). Discard shims.
Repair kit includes O-ring (7), shaft bearing (8), vanes (10),
shaft bearing (11), and shims (13).
Cleaning and Inspection.
Dry cleaning solvent P-D-680 is potentially dangerous. Avoid
repeated and prolonged breathing of vapors and skin contact
with the liquid. Do not use near open flame, arcing equipment
or other ignition sources. Always wear eye protective clothing.
The flash point of P-D-680 is 1 00 to 138 deg. F (38 to 59 deg.
Clean all parts with dry cleaning solvent (Item 3, Appendix E).
Death or serious injury could occur if compressed air is directed
against the skin. Do not use compressed air for cleaning or
drying unless the pressure is/has been reduced to 30 psi (2.11
kg/cm2) or less. When working with compressed air, always use
chip guards, eye protection, and other personal protective
Dry all parts with compressed air.
Examine parts for cracks, severe corrosion, or other damage. Replace defective parts.