Hitachi 232437 - Manual (Page 14)

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Maintenance
Preventive Maintenance Schedule
The operating conditions of your particular system
determine how often maintenance is required. Estab-
lish a preventive maintenance schedule by recording
when and what kind of maintenance is needed, and
then determine a regular schedule for checking your
system.
Clean the In-Line Fluid Filter Element
The filter/swivel (104) includes a 100 mesh stainless
steel filter element (105). Clean the element periodical-
ly with a compatible solvent, as follows.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
1. Relieve the pressure.
2. Disassemble the filter/swivel (104) and remove the
filter element (105).
3. Clean or replace the element, as necessary.
4. Reassemble. Torque the two halves of the filter/
swivel to 10–15 ft-lb (14–20 N
S m).
Flushing
WARNING
FIRE AND EXPLOSION HAZARD
Before flushing, read the section FIRE
AND EXPLOSION HAZARD on page
5. Be sure the entire system and flush-
ing pails are properly grounded. Refer to
Grounding on page 7.
Flush the pump:
D Before the first use
D
When changing colors or fluids
D Before fluid can dry or settle out in a dormant pump
(check the pot life of catalyzed fluids)
D Before storing the pump.
Flush with a fluid that is compatible with the fluid you
are pumping and with the wetted parts in your system.
Check with your fluid manufacturer or supplier for
recommended flushing fluids and flushing frequency.
CAUTION
If you have a carbon steel package, never leave
water or water-base fluid in the pump overnight. If
you are pumping water-base fluid, flush with water
first, then with a rust inhibitor such as mineral spirits.
Relieve the pressure, but leave the rust inhibitor in
the pump to protect the parts from corrosion.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
1. Relieve the pressure.
2. Remove the tip guard and spray tip from the gun.
Refer to the gun instruction manual.
3. Remove the filter element from the fluid filter (13).
Reinstall the filter bowl.
4. Remove the strainer (42). Place the pump inlet in a
container of solvent.
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail.
6. Start the agitator and run it slowly.
7. Start the pump. Always use the lowest possible
fluid pressure when flushing.
8. Trigger the gun. Flush the system until clear
solvent flows from the gun.
9. Relieve the pressure.
10. Clean the tip guard, spray tip, strainer, and fluid
filter element separately, then reinstall them.