13
307-711
MAINTENANCE
Thorough
flushing and proper maintenance are
essential to keep the sprayer working properly
and avoid costly damage to the sprayer or the
object being sprayed.
Diaphragm
Failure:
Always replace the diaphragm
after
every 500 hours of operation (once every 4
to
6 months). The diaphragm weakens with use. If it
ruptures,
hydraulic oil and paint may mix, damaging
the sprayer and/or the surface of the object being
sprayed
may be damaged.
Follow the Maintenance Intervals outlined below
.
CAUTION
Flushing Immediately
after each use
Lubricate Intake V
alve
Immediately after each use
T
ighten Paint Pump
1.
After first 3 to 5 hours
Screws and Inlet V
alve
of operation
2.
After next 3 to 5 hours
of operation
3. Each
25 hours thereafter
(about weekly)
Check and/or Change
1.
Check the oil after each
Hydraulic Oil
use of the sprayer
2.
Change the oil after first
20 hours of operation
3.
Change the oil each 50
hours thereafter (about
twice monthly)
Replace Diaphragm
After every 500 gallons of
paint
sprayed (4
to 6 months)
MAINTENANCE
INTER
VALS
Flushing Procedure
1. Shut off the sprayer. Engage the gun trigger safety
lever. Open the bypass valve ONE turn counter-
clockwise. Raise the paint pump just above the
paint
and turn on the sprayer to drain the paint. Now
turn
of
f the sprayer
. See Fig 7.
2. Place the paint pump in a grounded flushing pail of
solvent.
3. Check to be sure the trigger safety lever is set. Re-
move
the spray tip from
the gun. Disengage the safe
-
ty
lever
. Hold a metal part of the gun firmly to the side
of a grounded metal pail. Close the bypass valve.
Trigger the gun into the pail. Turn on the sprayer.
Watch
the side of the pail for solvent to appear
. Then
release
the gun trigger
. T
urn of
f the sprayer
.
4. With the bypass valve closed, turn on the sprayer,
trigger
the
gun into the flushing pail and allow the sol
-
vent
to circulate through the hose and gun for two to
three minutes, using the lowest possible pressure.
See Fig 8. Release the gun trigger and engage the
safety
lever
. T
urn of
f the sprayer
.
Fig 7
ON/OFF
SWITCH
OPEN
COUNTER-
CLOCKWISE
CLOSE
CLOCKWISE
BYPASS
VALVE
PRESSURE
CONTROL
KNOB
0275
DECREASE
Counterclockwise
INCREASE
Clockwise
0270
MAINTAIN
FIRM
METAL–TO–METAL
CONT
ACT BETWEEN
GUN AND CONTAINER
Fig
8
0276
5. Open the bypass valve ONE turn counterclock-
wise.
6. Raise
the paint pump above the solvent,
turn on the
sprayer,
and allow the pump to run itself dry
. T
urn the
sprayer OFF.
7. Using
a
clean pail of water or solvent, and the lowest
possible
pressure, flush again to be sure all paint par
-
ticles
are removed.
8.
Remove the paint strainer and clean it thoroughly
.
9.
Now lubricate the inlet valve. See page 14.
MAINTENANCE PROCEDURE CONTINUED ON
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