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3072966
Service
Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the spray tips.
1. Lock the gun trigger safety.
2. Turn off the power to the pump.
3. Close any master bleed-type air valves.
4. Unlock the gun trigger safety.
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
6. Lock the gun trigger safety.
7. Place a pail under the drain valve, and open the
drain valve to be sure all fluid pressure is relieved.
Keep hands away from the end of the drain valve
when opening it.
8. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly loosen the
tip guard retaining nut or hose end coupling and relieve
pressure gradually, then loosen completely. Now clear
the tip or hose.
Service Notes
Clean all parts thoroughly when disassembling. Check
parts carefully for damage or wear, replace as needed.
Numbers in parentheses in the text refer to the parts
drawings.
Check periodically for leakage from the small holes
near the top and bottom of the surge tanks. If you find
leakage at the holes or anywhere else, replace the
seals promptly.
Before removing the end plug and adapter from the
surge tank, loosen the setscrews (5) near the bottom
of the tank (6). See the parts drawings on pages 7
through 12.
Inspect the sealing surfaces for nicks or scratches that
might cause leakage. Do not damage the sealing
surfaces.
When reassembling filters after cleaning or servicing,
be sure to install the filter support as shown in the
parts drawings. Do not install it upside down.
WARNING
Tighten all threaded connections securely. High
pressure fluid can dislodge a loose connection or
allow high pressure fluid to be emitted from the
connection and cause serious injury.