4. ASSEMBLE THE BOOM VALVE
AND PISTON CARRIER
4a. For the boom valve assembly,
use PVC glue to weld one of the slide-through-modified 3" to 2" bushings
into one end of the 3" tee fitting, and
the 3" female adapter into the opposite end. Weld the unmodified 3" to 2"
bushing into the 3" repair coupling.
Wait for the glue to dry, and then dry-fit each end of the 2"× 6" pipe into the
2 bushings, with the beveled end in
the tee assembly.
4b. For the piston carrier, PVC-weld
the other modified bushing into the
3" male adapter. Let the glue dry, and
then test-fit the 8" piston carrier pipe
into the bushing.
4c. Slide the long end of the piston
into the carrier pipe and screw the
piston carrier male adapter into the
boom valve assembly female adapter.
4d. Adjust the 2 pipes in their bushings until the piston (without its
O-rings) travels freely between carrier pipe and boom valve assembly.
The small O-rings should tuck inside both tubes when the piston is
extended, and you can see a gap between the piston and the valve pipe
when the piston is retracted. Proper alignment is key. Mark the position
of the 2 tubes, remove them (and the piston) from the bushings, and
then weld the tubes back into place at the marks.
4e. Mark the positions of everything. Then remove the piston, unscrew
the 2 assemblies, and glue in the tubes. Apply primer and glue only to
the 2" pipes inside the marks and not the bushings, or else you’ll foul
the ends of the pipes.
4f. Weld the unmodified bushing and
repair coupling assembly to the other
end of the valve pipe, and the 2" male
adapter to the free end of the carrier
pipe. Alignment isn’t so important