Level-Rite
TM
BY RITE
-
HITE
®
LRL Series Elevating Dock Lift Owner’s Manual
Pub. No. 1174-R1 - June 2004
7
GENERAL FEATURES
OPERATION/PERFORMANCE
This elevating dock lift is operated by a pushbutton
control station. Press and hold the UP button to raise the
lift. Press and hold the DOWN button to lower the lift.
STANDARD LIP
This is the extendable portion of the dock lift which
provides a bridge from the platform to the bed of the
trailer.
PLATFORM
The platform, along with the lip, provides the main bridge
between the dock and the trailer bed. The platform is
constructed in a four-sided box structure.
HYDRAULICS
The hydraulic system on the dock lift consist of a power
unit assembly, hydraulic oil reservoir, and pressure lines
to the scissor cylinders.
POWER UNIT
This unit pumps hydraulic fluid to the dock lift cylinders.
The power unit consist of an electric motor, gear pump,
hydraulic fluid reservoir, and valving.
VELOCITY FUSE
The elevating dock lift is equipped with an emergency
support system called a velocity fuse. This valve is
placed in the hydrualic feed line for the scissor cylinders.
This valve is a normally open, spring loaded check valve.
If the return oil overcomes the spring tension, the valve
will close, preventing return flow of oil, and stopping the
lifts downward movement. The lift will remain in the
stopped position.
When an emergency drop occurs, the lift should be
inspected thoroughly by a RITE-HITE representative. If
nothing has failed, normal operation can be resumed by
pressing the lift UP button to reset the velocity fuse.
PENDANT CONTROL STATION - STANDARD
The pendant control that has been sent with the standard
unit consists of two pushbuttons and a decal that
provides operational instructions. When the UP
pushbutton is pressed, the hydraulic power unit is
activated which pumps fluid to the lift cylinders and
ultimately raises the elevating dock lift. When the
DOWN pushbutton is pressed, a solenoid valve is
activated and the platform lowers.
PENDANT CONTROL STATION - RITE-UP
OPTION
The pendant control that has been sent with the Rite-Up
option unit consists of three pushbuttons and a decal that
provides operational instructions. When the UP
pushbutton is pressed, the hydraulic power unit is
activated which pumps fluid to the lift cylinders and
ultimately raises the elevating dock lift. When the Rite-Up
pushbutton is pressed, the hydraulic system regenerates
fluid to lift cylinders increasing the lift speed. The Rite-Up
option will lift a payload up to 2500 lbs. When the DOWN
pushbutton is pressed, a solenoid valve is activated and
the platform lowers.
