User guide

AccuJet



Dispenser

1998 Nordson Corporation

107 142B

Issued 4/98

Manual 12-34

See Figure 8.

1.Insert the needle (7) through the seal in the upper body (8) and the

internal seal in the lower body (9). The needle is properly seated

when the needle ball contacts the end of the seat extension.

2.To properly seat the piston in the piston insertion tool (4), roll the

seallip (5) of the new air piston (6) on a clean flat surface. The seal

lip must be formed so that the lip hangs down toward the dispenser.

3.Coat the seal area of the piston insertion tool (4) and the

upperbody(8) with Parker O-ring lubricant or equivalent. Install the

piston assembly into the insertion tool. Make sure the entire

assembly fits into the tool.

4.Make sure that the air piston (6) is round. No gaps or folds can exist

between the piston insertion tool (4) bore and the air piston. Replace

the air piston, if necessary.

5.Invert the piston insertion tool (4), piston side down, and place it on a

flat surface.

6.Lubricate the O-ring (3) with Parker O-ring lubricant or equivalent.

Install the O-ring in the groove of the chamfered end of the

seallocknut (2).

7.Press the seal lock nut (2) into the top of the piston insertion tool (4)

and into the air piston. You must apply pressure to insert the seal

lock nut and make it secure.

8.Add O-ring lubricant to the threads of the needle (7). Place the piston

insertion tool (4) onto the top of the needle (7). Turn the piston

insertion tool clockwise. Thread the seal lock nut (2) onto the

needle(7) until the lip of the tool seats in the chamfer on top of the

upper body (8).

9.Continue winding the air piston (6) into the bore until the tool

disengages from the seal lock nut (2). See Figure 9. The top of the

seal lock nut should be flushed to within 0.25 mm (0.010 in.) above

the top of the upper body (8).

10.See Figure 8. Pull up on the needle approximately

-in. Do not pull

the air piston (6) out of the bore.

Air Piston