3-17. REPLACE/REPAIR CHECK VALVE ASSEMBLY
This task covers:
Tool Kit, General Mechanics (Item 2,
Cloth, Lint-free (Item 11, Appendix E,
Appendix B, Section Ill)
Socket Set, 8 to 19 mm (Item 6,
Appendix B, Section III
Shop Equipment Automotive Maintenance
Outlet air sound enclosure removed.
and Repair: Unit Maintenance,
Common No. 1 (Item 3, Appendix B,
Remove suction pipe nipple (1) and hose adapter/coupling (2).
Remove three hex nuts (4) and separate inlet flange (5) from pump casing (3).
Remove inlet flange (5) and check valve assembly (6 through 9).
Disassemble the check valve by removing screw (6).
Separate small weight (7), gaskets (8), and large weight (9).
Carefully inspect the gasket. If it is damaged, replace it. If not, thoroughly dean and wipe dry with lint-
Clean deposits from both weights and inside of flange using stiff bristled brush. Repeat as necessary.
Wipe dry with clean cloth.
Reassemble check valve assembly [small weight (7), gasket (8), and large weight (9)], with screw (6)
Hinged area of gasket faces the top stud. Large weight should face the
Install suction flange with tapered, protruding edge facing bottom.
Position check valve assembly onto three studs (10) of pump casing (3).