SERVICE
Piston Removal and Repair | 8. Install the new packing (27) and guide (26) in the | |||
1. | To disconnect the fluid hose (31) from the covergun body (1); screw the guide in loosely. | |||
| plate (41), screw the nut (34) off the adapter (35). | DO NOT fully tighten the guide (26) yet. The | ||
| See Fig21. | NOTE: | ||
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| guide must be loose to avoid damaging the | ||
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2. | Note the position of the trigger adjusting nut (24) for | packing (27) when pushing the piston shaft | ||
through the guide. | ||||
| reinstallation, then screw it off the piston shaft. |
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| 9. If replacing the ucup packing(37),slide it onto the | ||
3. | Remove the screws (61) and lock washers (82) frompiston (42) so the lips of the packing will face to; | |||
| the cover plate (41). Remove the cover plate (41),wards the front of the gun when the piston is in; | |||
| spring (38), and retainer cap (74). | stalled. Then install the buna;n o;ring (30) and | ||
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4. | Unscrew and remove the air valve guide (26) andVitonr o;ring (79) on the piston. | |||
| needle packing (27) from the gun body (1), | 10. Install the piston assembly into the gun body (1), | ||
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5. |
| being careful not to damage the piston's lip seal. | ||
Push on the end of the piston shaft, and remove the |
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piston assembly. | 11. Install the retainer cap (74) into the cover plate (41). |
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NOTE: DO NOT remove the u;cup packing (37) from
12. Install the cover plate (41), spring (38), and retainer
the piston shaft except to replace it as removalcap (74) with the screws (61) and lock washers (82). will damage this packing.
13. Actuate the trigger and tighten the air valve guide
6. Clean and inspect parts for wear or damage. Re;(26) with a wrench. place parts as needed.
7. When reassembling the piston assembly, lubricate14. Screw the trigger adjusting nut (24) onto the piston shaft to its previously noted position.
the o;rings (30 & 79) and the u;cup packing (42) on
the piston with petroleum jelly. Pack the spring (38)
15. Connect the fluid hose (31) to the adapter (35).
with petroleum jelly. Apply Teflon tape to the air valve guide (26).
KEY
1 | Gun Body | 34 | Nut | 42 | Piston |
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24 | Trigger Adjusting Nut | 35 | Adapter | 61 | Screws |
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26 | Air Valve Guide | 37 | U;Cup Packing | 74 | Retainer Cap |
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27 | Needle Packing | 38 | Spring | 79 | Viton O;Ring | 42 |
30 | Buna;n O;Ring | 41 | Cover Plate | 82 | Lock Washers |
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31Fluid Tube
37
79
74
141
35
38
Pack with lubricant
30
Apply |
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Teflon |
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tape | 61 |
26
24
82
27
3134
Fig 21
24