Poweramp POWERHOOK SERIES - Manual (Page 32)

ADJUSTMENTS
Powerhook Pressure relief Adjustment.
The pressure relief on a Powerhook is not adjusted by
the relief mounted on the pump. The pressure relief is
regulated by the relief mounted on the Big block.
On KS6 and KS7 restraints the relief is preset from the
factory and normally is not touched. KS4 and KS5 truck
restraints of some SC hooks the relief must be adjusted
during installation.
Locate the hook cylinder assembly and the hold down
cylinder assembly. See Figure 10. The length of the
threaded eye on the hold down cylinder will determine
the upper vertical limit of the hook movement.
A. Raise Leveler on to the maintenance prop and
lock in place.
B. Remove wire (36) from input #3 on the PLC.
C. Loosen lock nut and turn valve RV counter
clockwise until the valve stops.
E.Press the engage button the motor will run
but the hook will not move. Turn the RV
valve clockwise until the hook lowers to 2” off
the bottom of the pan then add one full turn
clockwise and lock in place. If the PLC shuts
down the motor before adjustments have been
reset the and continue were PLC shut off.
F.Re install wire (36) for input #3 on the PLC.
G.Test hook for proper operation.
#3 prox switch
Start
adjustments
at 10o’clock
position
Figure 13
4111-0010 — Nov 2010 30