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TROUBLESHOOTING CHART
I
PROBLEM
I
CAUSE
I
SOLUTION
Valve does not slow down
pump when
It
should;
pump runs away
vent when air supply is
Constant blast of air from
turned on.
Valve shuts down for no
apparent reason
Valvedoesnotresetwhen
RESET valve is pressed
Valve is not adjusted properly. Readjust valve and test.
See
page
4.
Ruptured diaphragm. (If diaphragm is rup-
tured,
the
TEST
bunon will have no
effect.)
Replace the diaphragm.
See
page
6.
Disassemble and clean valve. Replace O-rings. Piston is stuck
speed
to decrease.
Readjust valve and test. See page
4.
Decreased air pressure
has
caused pump
See page
6.
Poppet valve
(11, 14, 15)
is stuck closed.
Disassemble and clean poppet valve.
See
page 6.
Poppet valve
(1 1, 14, 15)
is stuck open.
Disassemble and clean poppet valve.
See
page
6.
Increased air pressure has caused pump Readjust valve and
test.
See page
4.
speed
to
increase.
Interrupted or exhausted fluid supply. Check fluid supply and ensure that
it
remains constant.
Valve is not adjusted properly.
Press RESET valve.
Air supply was turned on
too
quickly.
Check and repair. See page
6.
Defective poppet valve.
Check for properly adjusted fluid outlet pressure.
Decreased pump outlet pressure.
Readjust valve and test.
See
page
4.
,
Air leaking around TEST valve. Replace
TEST
valve.
~
Piston is stuck; no air is escaping from vent. Disassemble and clean runaway valve.
See page
6.
Alr blowing from poppet vent.
Remove
RESET
valve. Clean needle and seat area.
Valve is not adjusted properly. Readjust valve and test.
See
page
4.
See page 6.
I
1
Poppet vent hole plugged.
I
Disassemble and clean poppet valve.
See
page
6.
308-201
5
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