Poweramp EH SERIES HYDRAULIC 4.2009 - Manual (Page 9)

7 4111-0004 — November 2003
OCT 2007
INTRODUCTION
Component Identification
A — Lip
B — Lip Prop
C —Platform
D — Lip Cylinder E — Powerpack (Motor/Pump/Reservoir)
F — Platform Cylinder
G— Main Frame
H— Clean Sweep Removable Section H —Maintenance Prop
Lock-Out
J— Maintenance Prop
K —Toe Guards (2 used)
L —Control Box
M —Raise Button
N—ARTD Switch (option)
The EH dock leveler uses hydraulic logic and
one-button operation for ease of use.
The dock leveler can be operated remotely using the
RAISE button (M) on the control panel .
Platform (C) is raised by pushing and holding the
RAISE button (M). This activates an electric motor
(E) which, in turn, drives a hydraulic pump. The
hydraulic pump forces oil into the platform cylinder(s)
(F), causing the platform to rise. Releasing the
RAISE button allows the platform to lower.
When the platform rises to the highest point of travel
left in the platform cylinder, valving in the Powerpack
directs fluid flow to the lip cylinder, extending the lip.
With the lip fully extended, the raise button may be
released, allowing the leveler to float down on to the
truck for loading or unloading.
*See Operating Instructions for a complete operation
guide.
THEORY
N
M
L
F
K
H
A
C
B
D
G
E
I
J
H