Air Motor Service
Pressure Relief Procedure
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually relieved to prevent the system from starting or spraying/dispensing acciden-
tally. Fluid under high pressure can be injected through the skin and cause serious injury. To re- duce 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/dispensing,
Dcheck or service any of the system equipment,
Dor install or clean the spray tip/nozzle.
1.Close the pump air regulator and the
2.Hold a metal part of the spray gun/dispensing valve firmly to a grounded metal waste container and trigger the gun/valve to relieve the fluid pres- sure.
Before You Start
DBe sure you have all necessary parts on hand. Air Motor Repair Kit 206728 includes repair parts for the motor. Use all the parts in the kit for the best results. Parts included in the kit are marked with an asterisk, for example (19*), in the text and dra- wings. See Parts List on pages 10 – 14.
DFor best results keep parts marked with one aster- isk on hand to reduce down time.
DTwo accessory tools should be used: Padded Pliers, 207579, are used to grip the trip rod without damaging its surface, and a
Disassembly
1. Flush the pump.
WARNING
To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure above.
2.Relieve the pressure.
3.Remove the pump according to the instructions in the pump manual.
4.Place the air motor base (F) in a vise with the air motor up.
5.Loosen the cap nut (B). Pull up the cap nut, grip the trip rod (C) with the padded pliers, and screw the cap nut off of the rod.
CAUTION
Do not damage the plated surface of the trip rod (C). Damaging the surface of the trip rod can result in erratic air motor operation. Use the special padded pliers 207579 to grasp the rod.
6.Remove the six screws (D) holding the cylinder (E) to the base (F). Carefully pull the cylinder straight up off of the piston assembly (G).
CAUTION
To avoid damaging the cylinder wall, lift the cylinder straight up off of the piston. Never tilt the cylinder as it is being removed.
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