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Repair
42 309856P
Piston and Purge Rod
1. Follow Pressure Relief Procedure, page 18.
2. Flush Gun, page 22.
3. Disconnect air (D) and remove fluid manifold (G).
4. Disassemble Front End, page 35.
5. Unscrew purge rod stop (15) to remove piston
safety lock assembly. Inspect o-rings (14, 18) in
place.
TI3837a
G
D
15
14
TI3847a
18
6. Pull purge rod to remove piston (32). Inspect pis-
ton o-ring (16) and shaft o-ring (19).
7. Inspect purge rod (31) for scratches or damage.
Unscrew rod from piston with nut driver. Inspect
o-ring (18). Liberally lubricate with Fusion Gun
Lubricant, page 53. To reassemble, thread purge
rod (31) into piston (32) just until o-ring (18) is not
visible.
8. Liberally lubricate piston o-rings. Reinstall piston.
Shaft is keyed for proper assembly. Push firmly to
seat piston. Rotate piston/purge rod assembly
clockwise with nut driver until piston is fully seated.
16
19
32
TI3846a
18
19
31
TI3848a
16
32
TI3846a