Service
Fluid Packing Rod Removal and Repair
Preventative Maintenance
CAUTION
If the conductive fluid is allowed to leak through the packings, it will eventually cause an electrical short
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through the packings and along the gun barrel, resulting in a loss of voltage at the tip of the gun. Severe arcing can cause barrel damage. To avoid voltage loss and possible barrel damage, preventa- tive maintenance of the fluid packing assembly must be performed at regular intervals.
Use the following formula to calculate the best packing service interval for your application:
Service Interval in Days = 25,000
T x H
13
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Where | T = trigger cycles per minute |
and | H = hours of operation per day |
For example: If the trigger cycles per minute equals 10 and the hours of operation per day equals 8, the equation would be,
25,000 = | 25,000 = 312.5 |
10 x 8 | 80 |
The service interval would be 312 work days.
Procedure
NOTE: The fluid packing rod can be replaced as individual parts or as an assembly. If the assembly is purchased, it is
1.Prepare the gun for service as instructed on page 30.
2.Remove the air cap assembly, fluid nozzle, and resistor stud, and electrode as instructed on pages 30 to 32.
3.Loosen the trigger screws (4) far enough to remove the trigger (13). See Fig. 19.
4
05159A
Fig. 19
4.Remove the fluid packing rod assembly (28) with the
5.Check all the parts for wear or damage and re- place if necessary.
Before installing the fluid packing rod assembly (28), clean the internal surfaces of the barrel with a soft brush or cloth. Check the inside of the barrel for marks from high voltage arcing. If the marks are present, replace the barrel.
6.If the parts are purchased separately, assemble them as instructed in steps 7 to 16 and as shown in Fig. 20, on page 34.
If installing the complete fluid rod assembly, go to step 11, page 34.
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