Technical data

Repair

312185S 13

Repair

Disassembly

1. Relieve all air and fluid pressure, page 10.

2. Disconnect the valve from the system.

3. Remove the two nosepiece screws (19), and pull the

nosepiece (29) away from the valve. Remove the

needle seats (27) and o-rings (20) for the 255179

and 255181 models. See F

IG. 4.

4. 255179 and 255181 only: use a 5/32 in. socket

(4mm) to unscrew the needle (25). If the shaft (5)

spins, insert a dowel pin in the shaft hole to hold it

steady, then unscrew the needle. Slide the seal (26)

off the needle. Repeat for the other needle (25).

255180 and 255182 models: use a 3/32 pin punch

to remove the needle, then remove the seats (27)

and gaskets (28) from the inlet housing.

5. Remove the two fluid housing screws (18) and

clamps (17) from the fluid housing (14). Slide the

fluid housing (14) off of the air cylinder (2). See F

IG.

6. Remove the bearings (11), bearing o-rings (36, 13),

and secondary fluid seals (12, 15).

NOTE: In the following steps, keep the parts

from the A side and B side separate to prevent

cured material from forming on them.

IG. 4

TI9972A

FIG. 5

TI9974A