HP AUTOMATIC XT SPAY GUNS 311051D manual Service, Replace Fluid Packings and Air Seals

Service

Items Needed for Service

•1/16 in. Hex Wrench - provided

•3 mm Hex Wrench

•Adjustable Wrench

•4 mm Hex Wrench

•Pliers

•Lubricant part no. 111265; see Accessories, page 33, to order

•Compatible Solvent

Service

5.Using a 1/16 in. hex wrench loosen the fluid needle set screw (30). Remove the needle stop (29).

6.Pull the fluid needle (5) out the back of the gun.

7.Check the fluid needle (5) for damage or excessive wear. Replace the needle tip (5a) or the entire nee- dle if necessary.

8.Remove nozzle (23). Check nozzle and o-ring (36) for damage. You may need to use a pick to remove o-ring from housing (2).

Replace Fluid Packings and Air Seals

Air Section Repair Kit 288171 and Fluid Section Repair Kit 288135 are available. Purchase the kits separately.

1.Perform Pressure Relief Procedure, page 17.

2.Unscrew the four screws (13) and remove the gun from the manifold.

3.Remove the air cap retainer (25) and air cap (24). See FIG. 18.

36

TI8198a

FIG. 19

9.Remove the piston. Using a pliers, pull the piston (3) out of the piston housing (1). See FIG. 20.

10.Unscrew the two screws (14) and separate the fluid housing (2) and the piston housing (1). Remove gasket (12) only if it needs to be replaced. See FIG. 20.

14

23

24, 25

FIG. 18

4

13

TI8102a

2

14

1

TI8173a

FIG. 20

4.Remove the piston cap (4) from the piston housing

(1). Remove the springs (6, 7).

11.Remove the packing nut (16) with a wrench.

12.Remove the fluid packing (17) from the nut (16). Discard the old fluid packing.

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