
FF-MM-300-REV - 00
Page 11
Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for SN29PG
a. Shut off the air supply and allow residual
Pressure to bleed off.
b. Unscrew Allen Bolt (11) from Straight
Front Tube (6). Now remove Straight
Front Tube (6).
c. Unscrew similar Allen Bolt (11) from In-
termediate Tube (7). Now unscrew Inter-
mediate Tube (7) from Cylinder (1).
d. Remove Anvil (8), Needle Holder (9) with
Needles (10), and Compression Spring (5)
from Intermediate Tube (7) and replace it
with new ones. (If found damaged/worn-
out)
e. Unscrew Cylinder (2) from Cover Assem-
bly (1), Now remove O-ring (4), O-ring
(20), and Piston (3) from Cylinder (2) and
replace it with new ones.
f. Unscrew Valve Body (19) from Cover Assem-
bly (1).
g. Unscrew Valve Cap (13) with O-ring (15)
from Valve Body (19). Now remove Valve
Spring (14) and Valve Stem (12) with O-ring
(18) from Valve Body (19) and replace them
with new ones. (If found damaged/worn-out)
h. Remove O-ring (15) from Valve Cap (13) and
replace it with the new one.
i. Remove Roll Pin (17) from valve body (19).
Now remove Throttle Lever (16) from valve
body (19).
j. Coat parts with the recommended light oil
before re-assembling. Now follow the above
steps in a reverse manner to reassemble the
Needle Scaler.