Poweramp EH SERIES HYDRAULIC - Manual (Page 30)

28 4111-0004 —November 2003
Rev “B” February 2011
S1 Sequence Valve 1
Controls the Platform Cylinder. When the leveler has
reached the top of its travel allow the leveler to float
down. Fluid should flow through the NV1 valve. If you
hear the motor spinning backwards, or Leveler and/or
Lip may dropping prematurely adjust S1 clockwise in
small increments, testing each time, until the motor is
not spinning backwards or Leveler and/or Lip may drop
correctly.
S2 Sequence Valve 2
Controls the Lip Cylinder. This valve should be set to
allow a smooth, quiet shift. Turning S2 counter-
clockwise causes the lip to extend.
If the lip does not extend turn S2 counter-clockwise out
small increments until lip begins to extend. Once the lip
is extended allow the powerpack to operate in pressure
relief, then allow the leveler to return below dock.
Raise the leveler and continue to adjust the S2 valve to
allow a smooth, quiet shift. When adjusted properly, the
lip should stay extended until below dock. Lip
extension cycle should not take more than a few
seconds.
NV1 Need Valve 1
Controls the Down speed of the ramp cylinder.
Increase Down speed by turning NV1 counter-
clockwise,
Decrease Down speed by turning NV1 clockwise.
PO CHK Pilot Operated Check Valve
Keeps Lip from collapsing until it is below dock. This
valve is not adjustable. If lip malfunctions, cleaning or
replacement may be required.
RV1 Main Relief Valve
Sets system pressure
A—S2 Valve
B— RV1 Valve
C—S1 Valve
D— Not Used
E— NV1 Valve
F— Breather Tube/Fitting
G—To Hoist Cylinder
H—To Lip Cylinder
ADJUSTMENTS
Valve Adjustment Procedure Monarch
B
A
F
E
G
H
C