Creative Engineering ROCK-A-FIRE EXPLOSION - Page 48

Problems and Repair
Step by Step Description Cont.:
g. Remove all seals from the cylinder bore,
piston and nose end cap. Special care must
be used when removing the nose end cap seal
and wiper ring. The nose end seal #10 is
held into place with an internal expanding
retaining ring #9, it may be pried out and
reused, if care is used during removal.
h. Clean all cylinder components using rags
and warm soapy water only. No chemical
cleaners should be used as any residual
chemicals left in the cylinder could attack
the new seals. Blow off components with
compressed air prior to reassembly.
3. Reassembly of the cylinder:
a. Insert the rear bumper "o" ring #4 into the
cylinder barrel #3 and push it in until it
seats against the rear end cap.
b. Lubricate the barrel bore thoroughly with
black C.E.I. lube. Thoroughly lubricate the
piston shaft assembly #6, and install the
"U" cup seals onto the piston shaft
assembly.
c. Install the piston shaft assembly #6 back
into the cylinder bore #3. You will need to
use .003 Brass Shim Stock as a seal
compressor (See Drawing Page 3-018)
1) Wrap about a 2" piece of the shim stock
around the front U-Cups on the piston
shaft assembly. Wrap the brass only once
around the piston.
2) Carefully slide the piston into the bore
of the cylinder, do not twist the piston
to fit it in, you could cut the U-Cup.
3) When the U-Cups are past the threaded
end of the barrel, carefully remove the
Brass Shim stock from the cylinder bore.
d. Push the piston all the way into the bore
and re-lubricate the bore and piston
shaft #7
3-011