20
4111-0070 — May 2017
June 2017
OPERATION
When the RRH dock leveler is operated, an electric
motor(C) is activated, which, drives a hydraulic pump.
The hydraulic pump forces oil into the hoist platform
cylinder(s) (D), causing the platform to rise or lower.
Releasing the button will stop the platform from
moving (except in the float mode).
To lower the RRH dock leveler, the LOWER (K) button
will be depressed. The leveler will start to lower down
to the transport vehicle. When the leveler is about 12”
to 15” above dock height, the leveler goes into float
mode. You will also hear the motor make a different
sound and you no longer need to hold the LOWER
button. This feature is designed into the operation of
the leveler to allow for the floating/vertical motion of
the transport vehicle during loading and unloading.
LIP lower and LIP raise (J) button. To lower the lip the
RRH dock leveler must not be stored or in float mode.
Depress the LOWER(K) button and LIP(L) at the same
time and the motor will shut off and the lip will lower.
To extend the lip, depress the RAISE(I) and LIP(J) at
the same time button the motor will run and the lip will
extend. The Lip button is inactive while the leveler is in
the float mode.
Optional Remote: All leveler and side shift operations
can be performed with the corded remote.
Some models are equipped with Manual or Hydraulic
side shift.
Manual:
The RRH dock leveler and carriage will roll side to side.
Stops prevent the carriage from coming off the track.
Hydraulic:
Depressing the LEFT (L) or RIGHT (M) button acti-
vates the hydraulic side shift.
Theory
A
Control Box
D
Hoist Cylinder (s)
G
Side End Load Supports
J
Lip Button
B
Platform
E
Lip Cylinder (s)
H
Roller Track
K
Lower Button
C
PowerPack
F
Lip
I
Raise Button
L
Left Button
B
D
E
N
I
K
A
J
F
G
C
H
M
L
K
J
I
O
