VERDER VERDERAIR VA 40 Instructions Manual page 15

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 fluid side diaphragm plate (105).
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 gas-
ket (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 19–21.
Tighten or replace. See pages 19–21.
Inspect; replace. See pages 16–17.
Replace. See pages 19–21.
Tighten screws. See page 17.
Inspect; replace. See
pages 16–17, 22–23.
Tighten screws. See pages 22–23.
Tighten manifold bolts (106 and 112) or
replace seats (201) or o-rings (202). See
page 18.
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