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:
Dare instructed to relieve the pressure,
Dstop spraying,
Dcheck or service any of the system equipment,
Dor install or clean the spray tip.
1.Lock the gun trigger safety.
2.Shut off the hydraulic power supply.
3.Close the supply line shutoff valve, and then the return line shutoff valve.
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.Open the drain valve (required in your system), having a container ready to catch the drainage.
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 obstruction.
Before you start:
Be sure you have all necessary parts on hand.
1.Repair Kit 223654 is available. The kit must be purchased separately. An asterisk behind a refer- ence number in the parts list, for example (21*), indicates that the part is included in the repair kit.
2.Clean all parts as you disassemble them and inspect them for wear or damage. Replace parts
as necessary. Use Loctiter
Disassembly (Refer to Fig. 3)
NOTE: Use all the replacement parts that are in the repair kit.
1. Flush the displacement pump if possible.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.
2.Relieve the pressure.
3.Stop the pump at the bottom of its stroke.
NOTICE
Avoid getting dust or dirt in the motor during service. Cleanliness is essential when repairing an hydraulic motor.
4.Disconnect the displacement pump hoses. Discon- nect the hydraulic hoses and plug all hydraulic connections and lines to prevent contamination.
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