Graco Hydra-Cat Xtreme XL, Инструкция - Каталог запасных частей

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Troubleshooting
Troubleshooting Troubleshooting Troubleshooting
Low Low
Low Secondary
Secondary
Secondary Pump
Pump
Pump Pressure
Pressure
Pressure
Because the pumps are mechanically linked, the
action of one pump can affect the readings of the
second pump. Therefore, the key to successful
troubleshooting is to be
be
be sure
sure
sure to
to
to isolate
isolate
isolate the
the
the problem
problem
problem.
For example, if the secondary pump pressure on
the gauge is low and sluggish during the pump
changeover, the most likely problem is a binding
primary pump. To isolate the problem:
1. Follow Pressure Relief Procedure, page 12 .
2. With the sampling valves still open, set the air
supply regulator to the lowest setting and open
the bleed-type main air valve (A). Refer to Fig
3. Increase the regulator setting until the pump
just begins to move. Notice the position of the
secondary pump (L). Turn off the bleeder-type
main air valve (A) so that the secondary pump
rod is at its lowest position when the pump stops.
3. With the main bleed-type air valve (A) off, remove
the thumb screws (P) and guards (R) from each
side of the proportioner.
4. Unscrew the connecting rod nut (L) from the
secondary pump. Now you can verify the
operation of the primary pump alone.
5. Reinstall the guards (R) on both sides of the
proportioner. Turn the main air valve (A) back on
and carefully increase the air pressure.
6. Using the sampling valves at the mixer manifold:
a. Open and close the sampling valves and
check for pump stalling on both the up and
down strokes.
b. Check for rapid gauge response during the
pump changeover.
7. When the operation of the primary side has been
verified, reconnect the connecting rod (L) of the
secondary.
8. With the sampling valves still open, set the air
supply regulator to the lowest setting and open
the bleed-type main air valve (A). Increase the
regulator setting until the pump just begins to
move. Notice the position of the primary pump.
Turn off the bleeder-type main air valve (A) so
that the primary pump rod (K) is at its lowest
position when the pump stops.
9. With the main bleed-type air valve (A) off, remove
the thumb screws (P) and guards (R) from each
side of the proportioner.
10. Unscrew the connecting rod nut (K) from the
primary pump. Now you can verify the operation
of the secondary pump alone. Reinstall the
guards (R) on both sides of the proportioner.
Turn the main air valve (A) back on and carefully
increase the air pressure.
11. Using the sampling valves at the mixer manifold:
a. Open and close the sampling valves and
check for pump stalling on both the up and
down strokes.
b. Check for rapid gauge response during the
pump changeover.
12. When the operation of the secondary side has
been verified, reconnect the connecting rod (K)
of the primary pump.
16 3A3092A