Graco 208995, Инструкция и перечень запасных частей

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10 308060
Troubleshooting
CAUTION
When checking the pump pressure, do not leave the
check valve (J) or isolation valves (Q) closed for
more than 10 seconds while the pump is operating to
avoid overheating the pump and damaging the seals
and bearings.
NOTE:
Graco offers a rebuild program on all Imperial
and Crown Imperial pumps. Contact your local sales
representative for details.
WARNING
Before removing the pump for repair, shut off the
electric power,
relieve the pressure
, and drain the
pump by opening the drain valve at the pump base.
This will help reduce the risk of serious injury from
electric shock, moving parts, or splashing fluid in
the eyes.
Problem Cause Solution
Pump won’t run. 1. Electric power out. 1. Check fuses; clean terminals
and connections.
2. Fuses blown. 2. Check coupler clearance, re-
place fuses, repair pump (call
Graco Detroit, see back page).
3. Motor inoperative. 3. Repair or replace motor.
Pump runs but pressure drops
slightly.
1. Clogged pump intake. 1. Remove and clean.
2. Increased flow rate. 2. Adjust back pressure valve.
3. Parts worn or damaged. 3. Repair pump.
4. Air entrained in fluid. 4. *Purge air. See
Startup Proce-
dure
on page 7.
Pump runs but pressure very low
or unsteady.
1. Clogged pump inlet. 1. *Clean.
2. Air entrained in fluid. 2. *Purge air. See
Startup Proce-
dure
on page 7.
3. Problem with electric motor. 3. Check motor for proper rotation.
Check that RPM of motor is at
least 3750 under load.
TROUBLESHOOTING CHART IS CONTINUED ON PAGE 11.
* Before removing the pump for cleaning, close the
check valve (J) or line isolation valves (Q) and note
the maximum pump pressure; the pressure should
be steady.
Do not
leave valves closed for more
than 10 seconds.
If pressure variations or pulsations are noted, the
problem could be 1.) a clogged intake, 2.) too low a
fluid level in the tanks, or 3.) restricted plumbing.
Correct the clogged condition to obtain steady
pressure.
Low pressure can also be caused by air entrainment in
water reducible fluids. All return lines in tanks with
water reducible fluid must be routed to the bottom of
the tank.
Be careful to avoid allowing deteriorated pieces of bag
filters into the pump which can result in serious dam-
age to the pump.