5-5. Pump Assembly (cont).
Dry cleaning solvent, P-D-680, used to clean parts, is potentially dangerous to personnel
and property. Avoid repeated and prolonged skin contact. Do not use near open flame
or excessive heat. Flash point of solvent is 10OF - 138°F (38°C - 50°C).
(1) Clean all disassembled parts with cleaning solvent (Fed Spec P-D-680) and dry thoroughly with a soft
(2) Use probe to remove any obstructions in vane of the impeller (18).
c. Inspection alll parts including impeller housing (22), O-ring (23), mechanical seal (24), and spring
(25) for cracks, breaks or any other damage.
d. Repair by replacement from stock of any defective parts.
e. Assembly (figure 5-2)
Position key (21) in slot of engine shaft (20).
Install pump shaft (19) on the engine shaft (20).
Assemble wear ring (17) on the impeller (18) and secure with three setscrews (16).
Press wear ring (14) on diffuser (15) and secure with setscrew (13). Install dowel pin (12).
Place sealer gasket (11) on diffuser (15) and insert the assembly into the pump housing (10). Make sure
the dowel pin (12) mates with the slot in the pump housing (10).
Insert gaskets (2 and 5) in couplings (3 and 6) and install the couplings on the housing.
Install primer plug (7), drain plug (9) and inserts (8).
FOLLOWING ON MAINTENANCE
Install pump (para. 4-18).