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8) Spring Assist Assembly
Attach both Spring-Assist Cartridges (E) to
the Main Extension Arm (B) using an
20mm X 42cm Hex Bolt (JJ) and 20mm
Lock Nut (KK). In order to attach both
Spring-Assist Cartridges (E) at the bottom,
lower the open end of each Spring-Assist
Cartridge (E) down over the top of each
welded tab as shown in the diagram. Use
the 16mm X 19cm Hex Bolt (P) and 16mm
Lock Nut (J) to attach them to the welded
tabs. You may need to turn or rotate the
Spring-Assist Cartridges (E) to line up
holes. The Rim Height Indicator (G) should
hang freely along the outside of one of the
Spring-Assist Cartridges (E). Next, remove
and discard the plastic spring assist spacer
from Spring-Assist Cartridge (E).
Lower the system to relieve the pressure
on your blue spring assist spacer and then
remove it.
Mounting The Spring Assists
produnkhoops.com/video/spring_assist.html
9) Upper Linkage Assembly
Attach Parallel Linkages (C) to Vertical Post (A)
with a 18mm X 36cm Hex Bolt (Q) and a 18mm
Lock Nut (BB).
Mounting The Upper Linkage Arms
produnkhoops.com/video/linkage_arms.html
NOTE: It does not matter which end of the par-
allel link you attach to the vertical post.
CAUTION: Injury may occur if linkages are
allowed to fall off main arm during assembly
NOTE: Tighten the lock nuts down and then
back off a 1/4 turn to allow the joint to pivot
when adjusting the system up and down.
NOTE: Tighten the lock nut down
and then back off a 1/4 turn to al-
low the joint to pivot when adjust-
ing the system up and down.
17
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