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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
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
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 pre-adjusted at the factory.
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.
Fig. 19
4
13
62
28
05159A
4. Remove the fluid packing rod assembly (28) with
the multi-tool (62).
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.