Service
WARNING
INJECTION HAZARD
To reduce the risk of a fluid injection injury, follow the Pressure Relief Proce- dure on page 7 before checking or
servicing any of the system equipment and when- ever you are instructed to relieve pressure.
NOTE:
DFollow the Service Notes in Fig. 8 when reassem- bling the gun. Also refer to the parts drawing on page 16 for parts not shown in Fig. 8.
DGun Repair Kit 224±949 is available. See page 17. The reference numbers with asterisks in the service procedures are included with the kit.
Air Valve Service
1.Relieve the pressure as instructed on page 7.
2.Remove the trigger (3) and valve cap (11). See the parts drawing and Fig. 8.
3.Unscrew the needle nut (49) while holding the flats of the air valve (52*) stem with a long nose pliers.
CAUTION
To avoid leakage, be careful not to scratch the air valve stem.
4.Remove the spring (10*) and air valve (52*).
5.If there is air leakage at the air valve (52), unscrew the packing nut (50) and carefully remove the
6.If leakage occurs internally or the front of the gun leaks air when it is not triggered, clean and inspect the air valve and the spring for wear or damage. Replace as needed.
7.For the best air valve life, lubricate the external air valve shaft (point A) with light oil after each day's use.
Fluid Packing Replacement
Follow the procedure below to remove the fluid pack- ings for cleaning or replacement and to inspect the needle shaft when there is leakage from the back of the needle.
1.Relieve the pressure as instructed on page 7.
2.Remove the air cap retainer (25), air cap (27), spray tip (28), and air separator (32). See Fig. 8.
3.Trigger the gun to back the fluid needle ball off the seat. Remove the
4.Remove the trigger (3). See the Parts Drawing, page 16.
5.Remove the hex nut (21*) from the fluid needle (5*), while holding the square part of the fluid needle.
6.Pull the fluid needle (5) and compression spring (24*) from the front of the gun.
7.To remove the old packings (47*), insert the pack- ing tool (55*) into the front of the gun and screw it into the packings. Pull the packings from the front of the gun.
8.Clean the parts with a compatible solvent and a soft brush. Inspect the fluid needle (5) for wear or damage, and replace it if necessary.
9.Insert the new packings (47) onto the fluid needle
(5)shaft as shown in Detail D of Fig. 8.
10.Install the fluid needle (5). Do not damage the packings.
11.Screw the hex nut (21) all the way onto the fluid needle (5). Do not
12.Install the trigger.
13.Trigger the gun while screwing the
(30)back into the gun. Torque the
14.Install the air separator (32), spray tip (28), air cap (27), and air cap retainer (25).
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