Graco Dura-Flo 900, Инструкция-перечень запасных частей

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Troubleshooting Chart
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 12.
1.
Relieve the pressure.
2. Check all possible causes and problems before
disassembling the pump.
PROBLEM CAUSE SOLUTION
The pump fails to oper-
ate.
Restricted air/hydraulic line or an inade-
quate air/hydraulic supply; closed or
clogged valves.
Clear the line; increase the air/hydraulic supply.
Check that the valves are open.
Obstructed fluid hose or gun;
the fluid hose ID is too small.
Open, clear*; use a hose with a larger ID.
Fluid has dried on the displacement rod. Clean the rod; always stop the pump at the bottom
of its stroke;
keep the wet-cup 1/3 filled with a compatible sol-
vent.
Dirty, worn, or damaged motor parts. Clean or repair; see the separate motor manual.
The pump operates,
but the output is low on
both strokes.
Restricted air/hydraulic line or an inade-
quate air/hydraulic supply; closed or
clogged valves.
Clear the line; increase the air/hydraulic supply.
Check that the valves are open.
Obstructed fluid hose or gun;
the fluid hose ID is too small.
Open, clear*; use a hose with a larger ID.
Worn packings in the displacement
pump.
Replace the packings.
The pump operates,
but the output is low on
the downstroke.
Held open or worn intake valve. Clear the valve; service.
The pump operates,
but the output is low on
the upstroke.
Held open or worn piston valve or pack-
ings.
Clear the valve; replace the packings.
Erratic or accelerated
pump speed.
Exhausted fluid supply. Refill the supply and prime the pump.
Held open or worn piston valve or pack-
ings.
Clear the valve; replace the packings.
Held open or worn intake valve. Clear the valve; service.
* To determine if the fluid hose or gun is obstructed, follow the
Pressure Relief Procedure
on page 12. Discon-
nect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the air or hydraulic
power just enough to start the pump. If the pump starts when the air or hydraulic power is turned on, the ob-
struction is in the fluid hose or gun.
NOTE:
If you experience air motor icing, call your Graco distributor.