Troubleshooting
3A0411A
9
Exhaust air contains fluid being
pumped.
Diaphragm (or backup) ruptured.
Replace. See page 14.
Loose diaphragm shaft bolt.
Tighten or replace. See page 14.
Diaphragm shaft bolt o-ring dam-
aged.
Replace o-ring. See page 14.
Moisture in exhaust air.
High inlet air humidity.
Use drier air supply.
Pump exhausts excessive air at stall. Worn air valve cup or plate.
Replace cup and plate. See page 10.
Damaged air valve gasket.
Replace gasket. See page 10.
Damaged pilot valve.
Replace pilot valves. See page 14.
Worn shaft seals or bearings.
Replace shaft seals or bearings. See
page 14.
Pump leaks air externally.
Air valve or fluid cover screws loose. Tighten.
Diaphragm damaged.
Replace diaphragm. See page 14.
Air valve gasket damaged.
Replace gasket. See page 10.
Air cover gasket damaged.
Replace gasket. See page 14.
Pump leaks fluid externally from
joints.
Loose manifold screws or fluid cover
screws.
Tighten manifold screws or fluid
cover screws. See page 20.
Manifold o-rings worn out.
Replace o-rings. See page 12.
Problem
Cause
Solution