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PROBLEM
Fluid in exhaust air.
Pump exhausts excessive air at
stall.
Pump leaks air externally.
Pump leaks fluid externally from ball
check valves.
Troubleshooting
CAUSE
Diaphragm ruptured.
Loose fluid side 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
gasket (22) is damaged.
Air cover screws (25) are loose.
Loose manifolds (102, 103), dam-
aged seal between manifold and
seat (201), damaged o-rings (202).
SOLUTION
Replace. See pages 19 to 21.
Tighten or replace (pages 19 to 21).
Repair or replace. See pages
16 to 17.
Replace. See pages 19 to 21.
Tighten screws. See page 17.
Inspect; replace. See pages
16 to 17 and 22 to 23.
Tighten screws. See pages
22 to 23.
Tighten manifold bolts (106 or 112)
or replace seats (201) or o-rings
(202). See page 18.
308443
15
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