Poweramp HNL SERIES HYDRAULIC - Manual (Page 10)

8 Manual No. 4111-0029
November 2009
May 2012
INTRODUCTION
Component Identification
A — Lip Plate
B —Center Plate
C — Extended Link Arm
D — Powerpack (Motor/Pump/Reservoir)
E — Hinge Area
F — Platform Cylinder
G — Spring Assembly
H — Bumper Blocks (2 used)
J —Raise Button
K —Lower Button
The HNL Edge-of-Dock leveler uses a pressure
operated valve block and two push-button controls for
ease of use.
The dock leveler can be operated using the RAISE
button (J) or LOWER button (K) on the control panel .
Platform (B) is raised by pushing and holding the
RAISE button (J). This activates an electric motor (D)
which, in turn, drives a hydraulic pump. The hydraulic
pump forces oil into the platform cylinder (F). When
extended link arm (C) locks in place, pushing and
holding the LOWER button (K) lowers unit onto the
truck bed.
Once in the back of the truck the extend link arm (C)
will disengage which will allow the lip to retract to the
stored position once trailer has pulled away from dock.
Pressing the raise button will return the platform and
lip to the stored position once the lip clear the bed of
the trailer.
THEORY
A
D
B
C
F
G
E
H
J
K