Service - Graco PRESIDENT 207-706 Instructions-Parts List Manual

SERVICE
WARNING
To reduce the risk of serious bodily injury, in-
Pressure Relief Procedure 5. Ho1d.a metal part of the gun firmly to the side of
cluding fluid injection, splashing in the eyes or on
a grounded metel pail, and trigger the gun to
the skin, or injury from moving parts, always
relieve pressure.
6. Engage the gun safety latch.
follow this procedure whenever you shut off the
pump, when checking or servicing any part
o f
the
7. Open the drain velve (required), having
a con-
tainer ready
to
catch the drainage.
spray tips, and whenever you stop spraying.
system, when installing, cleaning or changing
8.
Leave the drain valve open until you are ready
to spray again.
1. Engage the gun safety latch.
If you suspect the spray tip or hose
is
completely
2. Turn off the air to the pump.
3.
Close the bleed-type master air valve
clogged, or that pressure has not been fully reliev-
ed after following the steps above,
VERY SLOW-
4. Disengage the gun safety latch. coupling and relieve pressure gradually, then
LY loosen the tip guard retaining nut or hose end
loosen completely. Now clear the tip or hose.
(required).
WARMING
Never operate the pump with the air motor plates
removed
to
reduce the risk of accidentally pinch-
ing or amputating your fingers on moving parts in
CHECK ALL POSSIBLE PROBLEMS AND SOLUTIONS BEFORE DISASSEMBLING PUMP.
TROUBLESHOOTING
on both strokes
I
I
Pump operates but output low
on
UD
stroke
r
Erratic or accelereted operation
CAUSE
Restricted line or inadequate air
supply
clogged air valve, etc.
Insufficient air pressure, closed or
Exhausted fluid supply
Clogged fluid line; valves, etc.
Tight throat packing nut (36)
Loose throat packing nut or worn
packings (18,
2 3 )
Held open or worn intake valve
ball ( 2 8 )
Held open or worn fluid piston
ball (17) or packings (18. 23)
Exhausted fluid supply
ball (28)
Held open or worn intake velve
Held open or worn fluid piston
TROUBLESHOOTlh
SOLUTION
Clear: increase air
Clean; open
and fluid lines
Refill; purge all air from pump
Clear'
Loosen (see page 5)
Tighten (see page 5). replace
Clear, service
Clear; service
and fluid lines
Refill; purge all air from pump
Clear, service
Clear, service
CHART CONTINUED ON NEXT PAG