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To reduce the risk of serious bodily injury, in-
Pressure Relief Procedure
cluding fluid injection, splashing in the eyes or on
the skin, or injury from moving parts, always
follow this procedure whenever you shut
off
the
spray system, when installing, cleanmg or chang-
pump, when checking or servicing any part of the
ing spray tips, and whenever you stop spraying.
2. Turn off the air to the pump.
1. Engage the gun safety latch.
3.
Close the bleed-type master air
valve
4. Disengage the gun safety latch.
(required).
5. Hold a metal part of the gun firmly
to the side of
a grounded metal pail, and trigger the gun into
6. Engage the gun safety latch.
the pail to relieve pressure.
7 . Open the pump drain valve (required) and leave
open until you are ready to spray again.
If you suspect that the spray tip or hose is com-
pletely clogged, or that pressure has not been fully
relieved after following the steps above, VERY
hose end coupling and relieve pressure gradually,
SLOWLY loosen the tip guard retaining nut or
then loosen completely. Now clear the tip or hose.
TROUBLESHOOTING CHART
Check all possible problems and solutions before disassembling
the pump.
Pump won't operate,
~~~~
~~
Pump
operates
but
output
low.
CAUSE
1.
Restricted or inadequate air supply.
2.
Obstructed fluid hose, gun, or
dispensing valve.
3.
Exhausted fluid supply.
4.
Fluid dried on displacement rod.
5.
Damaged
air motor.
1.
Restricted or inadequate
air supply.
2.
Obstructed fluid hose,
gun,
or
dispensing valve.
3.
Exhausted fluid supply.
4.
Air in displacement pump and
hose.
5.
Check valves need adjustment.
6.
Throat
packing nut too
tight
or
too loose.
7.
Throat packings worn.
8. Held open
or
worn intake valve.
9. Held open or worn fluid piston or
1.
Exhausted fluid supply.
2.
Check valves need adjustment.
3.
Held open or worn intake valve.
4.
Held
open or
worn fluid
piston or
packings.
packings.
Erratic or accelerated operation.
above, then disconnect the fluid
SOLUTION
1. Clear,
increase.
2.
Clear' .
3.
Refill and prime"".
4.
Clean***.
5. Service; see manual
307-049.
1. Clear,
increase.
2. Clear'.
3.
Refill and
pri m e' . .
4.
Reprime. See page 6.
5.
Adjust.
See
page
6.
6.
Adjust. See page
6.
7.
Replace.
8.
Clear, service.
9.
Clear,
service.
1.
Refill and prime**.
2.
Adjust.
3.
Clear, service.
4. Clear,
service.
x e . Turn on air; if pump starts,
"*Stop pump immediately. Refill and prime to remove all air from system, or flush pump and store with mineral spirits in
it.
"'"To help avoid this problem, always stop pump at the bottom of its stroke, and keep
TSL in wet-cup.
306-694
7
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