PAGE 2 of 2
LIT-118
After loosening you can turn the chuck retainer out with you 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 shaft 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.
Fig. 8
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
004-406V2 Standard Spring
1.330" (34mm)
Illustration from LIT-138
900 Overlander Road
P.O. Box 1153
Emporia, KS 66801 USA
Toll-Free: 1-800-835-3519
Phone: 620-343-1084
Fax: 620-343-9640
E-mail: [email protected]
www.grstools.com
