Troubleshooting
310622C
17
PROBLEM
CAUSE
SOLUTION
Leak in inlet or outlet sanitary fit-
ting.
Loose sanitary clamp.
Tighten clamp.
Damaged or worn gasket.
Replace gasket.
Misalignment of inlet/outlet hose or
pipe.
Use flexible hoses at pump inlet
and outlet.
Gasket does not seal.
Use a standard sanitary gasket of
flexible material such as Buna-N,
Viton, or silicon.
Fluid in exhaust air.
Diaphragm ruptured.
Replace. See page 23.
Loose diaphragm plate.
Tighten or replace. See page 23.
Damaged o-ring (108).
Replace. See pages 23.
Pump exhausts excessive air at
stall.
Worn air valve block, plate, pilot
block, u-cups, or pilot pin o-rings.
Repair or replace. See page 18.
Worn shaft seals.
Replace. See page 23.
Pump leaks air externally.
Air valve cover is loose.
Tighten screws. See page 18.
Air valve gasket or air cover gasket
is damaged.
Inspect; replace. See page 18.
Air cover clamps are loose
Tighten clamps
Pump leaks fluid externally from
ball check valves.
Loose manifolds, damaged seal
between manifold and seat, dam-
aged gaskets.
Tighten manifold clamps or replace
seats or clamps (32). See page 22.
