20
4111-0068 — Oct. 2018
© 2018 Systems, LLC
Main Pressure Relief Adjustment
Note:
The main pressure relief may need to be
increased
if the barrier does not rise, or rises slowly
with the system operating in pressure relief mode.
The main pressure relief may need to be
decreased
if the barrier motor loads down when the barrier arm
reaches the full raised position.
See Troubleshooting section on pages 22-25 for
more information.
1. Fully lower the barrier arm.
2. Turn OFF all electrical power to the barrier.
3. Loosen jam nut (
A
).
Adjust Main Pressure Relief
4. Adjust adjusting screw (
B
) as follows:
• To increase pressure relief, turn adjusting screw
clockwise one full turn.
• To decrease pressure relief, turn adjusting screw
counterclockwise one full turn.
5. While holding the adjusting screw (
B
), tighten jam
nut (
A
).
6. Turn ON electrical power to the barrier.
7. Test barrier and repeat steps 1–6 as necessary.
ADJUSTMENTS
If it is necessary to service the barrier with the arm
in the vertical position, engage a safety chain to
prevent the arm from falling.
In addition, it is recommended and good safety
practice to use use an additional means to support
the raised barrier arm. This additional means may
include, but is not limited to a boom truck, fork truck,
stabilizing bar or equivalent.
When service is required, always lock all electrical
disconnects in the OFF position.
Always post safety warnings and barricade the
work area at dock level and ground level to
prevent unauthorized use of the equipment before
maintenance is complete.
A hard hat or other applicable head protection
should always be worn when working under or
around the barrier.
Always stand clear of the raised barrier arm when
working in front of the barrier.
TOLERANCES
(UNLESS OTHERWISE NOTED)
FRACTIONAL:
1/32"
DECIMAL:
.00 =
.01"
.000 =
.005"
ANGULAR:
1
DRAWN BY
CHECKED BY
DRAWING NO.
DATE
BDK
10/2/2018
S Y S T E M S
L o a d i n g D o c k E q u i p m e n t
P O W E R A M P
M C G U I R E
D L M
This print is the property of Systems, LLC and represents a proprietary article in which Systems, LLC retains any and all patent and other rights, including exclusive rights
of use and/or manufacture and/or sale. Possession of this print does not convey any permission to reproduce, print or manufacture the article or articles shown therein,
such permission to be granted only by written authorization signed by an officer or other authorized agent of Systems, LLC thereof.
MATERIAL
STOCK NO.
B2 BARRIER
ASSEMBLY
REV A - ECN 18-066
TOLERANCES
(UNLESS OTHERWISE NOTED)
FRACTIONAL:
1/32"
DECIMAL:
.00 =
.01"
.000 =
.005"
ANGULAR:
1
DRAWN BY
CHECKED BY
DRAWING NO.
DATE
BDK
10/2/2018
S Y S T E M S
L o a d i n g D o c k E q u i p m e n t
P O W E R A M P
M C G U I R E
D L M
This print is the property of Systems, LLC and represents a proprietary article in which Systems, LLC retains any and all patent and other rights, including exclusive rights
of use and/or manufacture and/or sale. Possession of this print does not convey any permission to reproduce, print or manufacture the article or articles shown therein,
such permission to be granted only by written authorization signed by an officer or other authorized agent of Systems, LLC thereof.
MATERIAL
STOCK NO.
B2 BARRIER
ASSEMBLY
REV A - ECN 18-066
Figure 14
A — Jam Nut
B — Adjusting Screw
A
B
