SERVICE
cluding
injury
from
moving
parts
and
splashing
in
the
eyes. always shut
off
the
air
to
the
pump,
close
the
air
control
valve
and
bleed-type
master
air
.TROUBLESHOOTING CHART
Check all other
solutions
before disassembling the
pump.
PROBLEM CAUSE SOLUTION
lPump
will
not start.
Air valve assembly sticking; broken actuator Check both valve spools for freedom of mow
I
ment: clean, oil, or replace. See page
7.
I
I
Obstructed fluid line.
I
Clear line or increase line size.
I
Obstructed diaphragm chamber. clean.
Diaphragmfailure causing fluid and Replace diaphragm. See page
8.
air
to
be expelled through the exhaust.
-
Erratic flow.
~~
Diaphragm failure on one side.
Replace diaphragm. See Page
8.
Diaphragm failure causing
air
to
be expelled
Check and correct:
Suction leakage.
Check and remove obstruction. See page 9.
Check valve ball not seatingJworn.
Replace diaphragm. See page
8.
through the fluid inlet.
Pump strokes but
will
not
discharge.
Shorten suction line.
Excessive suction
lift.
Suction line leakage.
Replace diaphragm.
Diaphragm failure.
Clean. Suction line or strainer clogged.
Check and correct. Check valve ball not seating correctly.
Check and correct.
Pump
Repair.
1.
Shut
off
the
air
to
the pump,
close
the
air
control
valve
and
the
bleed-type
master air valve.
-
1
2.
Disconnect
the air
and
fluid
hoses.
face
for
proper reassembly.
l/&&
II\.
4
-
.
Fig
3
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