Filter
Top Products
308550 15
Troubleshooting
PROBLEM CAUSE SOLUTION
Fluid in exhaust air. Diaphragm ruptured. Replace. See pages 19–22.
Loose fluid side diaphragm plate
(105).
Tighten or replace. See pages
19–22.
Pump exhausts excessive air at
stall.
Worn air valve block (7), o-ring (6),
plate (8), pilot block (18), u-cups
(10), or pilot pin o-rings (17).
Inspect; replace. See pages 16–17.
Worn shaft seals (402). Replace. See pages 19–22.
Pump leaks air externally. Air valve cover (2) or air valve cover
screws (3) are loose.
Tighten screws. See page 17.
Air valve gasket (4) or air cover
gasket (22) is damaged.
Inspect; replace. See pages 16–17,
23–24.
Air cover screws (25) are loose. Tighten screws. See pages 23–24.
Pump leaks fluid externally from ball
check valves.
Loose manifolds (102, 103), dam-
aged seal between manifold and
seat (201), damaged o-rings (202).
Tighten manifold bolts (106 and
112) or replace seats (201) or
o-rings (202). See page 18.