Poweramp POWERHOOK P4111-0010 5.2006 - Manual (Page 31)

29 4111-0010 — December 2004
ADJUSTMENTS
Adjust PowerHook Operating Range
4. Adjust the upper vertical limit of PowerHook
operating range if necessary.
A. Locate the hook cylinder assembly and the
hold down cylinder assembly. See Figure 25.
The length of the threaded eye on the hold
down cylinder will determine the upper
vertical limit of the hook movement.
B. Disconnect the Hydraulic hose from the hold
down cylinder. Cap off the open fittings to
prevent fluid loss and to prevent
contamination from entering the system.
C. Remove the keepers from the hold down
cylinder trunnion. See Figure 26.
D. Lift up on the hook cylinder. This will allow the
hold down cylinder to exit the trunnion.
E. While holding the hook cylinder up, loosen
the jam nut that is on the threaded eye of the
hold down cylinder.
F. Turn the hold down cylinder counter clock
wise if the upper limit of the hook, as
previously measured, was greater than 35”.
Turn the hold down cylinder clockwise if the
upper limit was less than 30”. Each full turn
of the cylinder results in approximately 1/2” of
vertical adjustment.
G. Tighten the jam nut on the threaded eye, set
the hold down cylinder into the trunnion, and
reinstall the trunnion keepers.
IMPORTANT: Make sure that the breather (or
breather hose fitting) on the hold down cylinder is
facing down (towards the pit floor) and the hose port
is facing up.
H. Reattach the hydraulic hose to the hold down
cylinder.
I. Repeat steps B through H until the upper
vertical limit of the hook is 30”-35” above the
driveway.