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Troubleshooting
PROBLEM
Fluid in exhaust air.
Pump exhausts excessive air at stall.
Pump leaks air externally.
Pump leaks fluid externally from ball
check valves.
CAUSE
Diaphragm ruptured.
Loose diaphragm shaft bolt (107).
Damaged o-ring (108).
Worn air valve block (7), o-ring (6),
plate (8), pilot block (18), u-cups (10), or
pilot pin o-rings (17).
Worn shaft seals (402).
Air valve cover (2) or air valve cover
screws (3) are loose.
Air valve gasket (4) or air cover
gasket (22) is damaged.
Air cover screws (25) are loose.
Loose manifolds (102, 103), damaged
seal between manifold and seat (201),
damaged o-rings (202).
SOLUTION
Replace. See pages 17–19.
Tighten or replace. See pages 17–19.
Replace. See pages 17–19.
Repair or replace. See pages 14–15.
Replace. See pages 17–19.
Tighten screws. See page 15.
Inspect; replace.
See pages 14–15, 20–21.
Tighten screws. See pages 20–21.
Tighten manifold bolts (106) or replace
seats (201) or o-rings (202). See
page 16.
829.4334
13
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