PAGE 2 of 4 LIT-118
After loosening you can turn the chuck retainer out with your finger tips
(
Fig. 4
). As you pull out the chuck there will be a spring and piston that
follows. Loosen the locking ring and remove it (
Fig. 5
). Grip the knob and
turn the handpiece body counterclockwise until it is out of the knob body
(
Fig. 6
).
Now, with the handpiece disassembled, clean the parts with a NON-
residue solvent like denatured alcohol. Make sure the holes in the
handpiece body are clear from dirt and debris. DO NOT get moisture
down the air hose. If this happens you will need to clear and dry it before
reassembly.
Before reassembly, make sure every thing is completely dry. DO NOT
OIL INSIDE THE HANDPIECE. NO lubricant
is required. Lubricant will actually take away
performance!
Reassembly Note
There is an O-ring inside the knob that makes
getting the handpiece body to thread a little
difficult when reassembling. Use a very small
amount of synthetic lube or Teflon grease and
create a thin film around the OUTSIDE of the
handpiece body between the threads and the end
(
FIG. 7
). See “Adjusting The Handpiece To Fit You”
on p. 1 of this literature sheet for adjusting graver
and hose position.
Quick Change Holder Hint
Synthetic Lube or Teflon Grease on the shaft of a quick change holder
will make them easier to slip in and out.
Fine Spring Option
The Fine Spring offers you the option to tune the 901’s power for finer
engraving work. With this spring in the handpiece, the air pressure will
need to be approximately 14 psi.
To Change Springs
Place a Quick Change Holder with a graver in the chuck. Using a wrench
or pliers grip the graver (
FIG. 8
) and turn it counterclockwise to loosen
the chuck retainer. After loosening you can turn the chuck retainer out
with you finger tips. As you pull out the chuck there will be a spring and
piston that follows. Replace
the spring with the shorter
“FINE WORK” spring and
reassemble.
NOTE: The piston has a
hollow end. The hollow end
MUST be next to the spring
or it will NOT work properly.
Very Light
synthetic grease film
Fig. 7
Hollow end
Fine Spring
FIG. 4
LOCKING
RING
FIG. 5
Fig. 6
NOTE: Do NOT
use petroleum
based oils - USE
ONLY Synthetic
oils. Fossil oils
can damage
the O-Rings.
PISTON
The hollow end must be toward spring.
NOTE: Avoid getting any oil or grease on
the piston (even oil from your hands).
1.112" (28mm)
004-430 Fine Work Spring
004-411-V2 Standard Spring
1.330" (34mm)
Illustration from LIT-138
Very Light
synthetic grease film
Fig. 8
