FF-MM-300-REV - 00
Page 17
Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for S39STVL
a. Shut off air supply and allow residual Pres-
sure to bleed off.
b. Unscrew Front tube (24) from Intermedi-
ate Tube (21) & remove Insert (23), Front
Spring (22).
c. Remove O-ring (26), Needle Holder (15)
with Needles (16) and Piston (11), Piston
Cushion (13) from Intermediate Tube
(21). Now remove Piston Ring (12) and
Valve Pin (14) from Piston (11) and re-
place it with new ones. (If found damaged/
worn-out)
d. Unscrew Intermediate Tube (21) from
Cover Assembly (1).
e. Remove O-ring (27) from Guide Plate (4)
& remove Ball Retaining O-ring (6) and
Ball (3) from Cylinder (5) Replace parts
with new ones. (If found damaged/worn-
out).
f. Unscrew Valve Cap (19) with O-ring (9) from
Cover Assembly (1) & remove Valve Spring
(17), Valve Stem (8) and O-ring (18). Replace
parts with new ones. (If found damaged/worn-
out).
g. Remove O-ring (9) from Valve Cap (19) and
replace with new one.
h. Remove Roll Pin (25) from Cover Assembly (1)
& remove Throttle Lever (27) from Cover As-
sembly (1) and replace with new ones. (If found
damaged/worn-out).
i. Coat parts with the recommended light oil be-
fore re-assembling. Now follow the above steps
in reverse manner to reassemble the Needle
Scaler.
