SL575
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CONTROLLER BOARD
GL
MODEL SL575
HEAVY DUTY SLIDE GATE OPERATOR
Serial #
(located on electrical box cover)
Installation Date
2 YEAR WARRANTY
MODEL SL575 IS FOR VEHICULAR PASSAGE GATES
ONLY AND IS NOT INTENDED FOR PEDESTRIAN
PASSAGE GATE USE
2
WARNING
CAUTIONCAUTION
WARNING
WARNING
WARNINGWARNING
WARNING
WARNINGWARNING
TABLE OF CONTENTS
OPERATOR SPECIFICATIONS
Carton Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operator Dimensions & Horsepower Chart . . . . . . . . . . . . . . . . . 4
UL325 Model Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATOR WARNINGS
Safety Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Suggested Entrapment Protection Device Locations . . . . . . . . . . 7
Safety Precautions for Open Roller Gates. . . . . . . . . . . . . . . . . . . 8
Warning Sign Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
WIRING
Power Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
INSTALLATION
Pad Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Post Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Install Gate Bracket & Drive Chain . . . . . . . . . . . . . . . . . . . . . . . 12
Available Conduit Access for the Electrical Box . . . . . . . . . . . . . 13
On/Off Switch Power Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Manual Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ADJUSTMENT
Limit Switch Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
RPM Sensor (Hall Effect) Adjustment. . . . . . . . . . . . . . . . . . . . . 14
Gate System Test Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
UL325 Entrapment Protection . . . . . . . . . . . . . . . . . . . . . . . .15-16
Control Board Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Program Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Control Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Radio Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-20
Accessory Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-21
Earth Ground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Sequenced Access Management System . . . . . . . . . . . . . . . . . . 23
OPERATION AND MAINTENANCE
Operator and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Solenoid Actuated Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Friction Clutch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Control Board Programming and Features . . . . . . . . . . . . . . .25-26
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27-28
Self-Regulating Heater Accessory. . . . . . . . . . . . . . . . . . . . . . . . 29
Heater Wiring Diagram for 115, 208, 230, 460
and 575V Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Single Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Single Phase Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Three Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Three Phase Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
REPAIR PARTS
Illustrated Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Safety Accessories for Secondary Entrapment Protection . . . . . 37
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-39
Warranty Policy and Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
IMPORTANT NOTES
• BEFORE attempting to install, operate or maintain the operator,
you MUST read and fully understand this manual and follow all
safety instructions.
• These instructions are intended to highlight certain safety
related issues. These instructions are not intended to be
comprehensive. Because each application is unique, it is the
responsibility of the purchaser, designer, installer and end user
to ensure that the total gate system is safe for its intended use.
Mechanical
Electrical
When you see these Safety Symbols and Signal Words on the
following pages, they will alert you to the possibility of SERIOUS
INJURY or DEATH if you do not comply with the warnings that
accompany them. The hazard may come from something
mechanical or from electric shock. Read the warnings carefully.
When you see this Signal Word on the following pages, it will alert
you to the possibility of damage to your gate and/or the gate
operator if you do not comply with the cautionary statements that
accompany it. Read them carefully.
CARTON INVENTORY
Before beginning your installation check that all components
were supplied and received undamaged. Refer to list below for
factory supplied parts.
HARDWARE KIT K77-34846
DESCRIPTION QTY.
Safety Gate Brochure 1
Gate Bracket 2
Nickel Plated Chain #50 1
Master Link #50 2
Warning Sign 2
U-Bolt 2" 5/16-18 4
U-Bolt 3" 3/8-16 4
Flat Washer 7/16" 4
Hex Nut 3/8"-16 8
Lock Washer 5/16" 8
Lock Washer 3/8" 8
Eyebolt Chain #50 2
Hex Nut 5/16-18 8
Hex Nut 7/16-14 4
Set Screw 7/16-14 4
Flat Washer 3/8 8
Flat Washer 7/16 8
Spring Washer 7/16 4
Antenna 1
3
OPERATOR DIMENSIONS AND HORSEPOWER CHART
MODEL SL575
• 1/2 HP Motor
Maximum Cycle Rate - 22 cycles per hour (At Maximum Gate Weight)
Maximum Gate Speed – 10"/sec. (25.4 cm/sec.)
Maximum Gate Weight – 1200 lbs. (544.3 kg)
Maximum Cantilever Gate Width – 25 ft. (7.6 m)
Maximum Overhead Roller Gate Width – 40 ft. (12.2 m)
Maximum V-Track Gate Width – 30 ft. (9.1 m)
28.9"
(73.4 cm)
(69.9 cm)
17.2"
(43.7 cm)
27.5"
37.7"
(95.8 cm)
19.5"
(49.5 cm)
14.9"
(37.9 cm)
14.1"
(35.8 cm)
10-7/8"
(27.6 cm)
4
Moving Gate Can Cause
Injury or Death
KEEP CLEAR! Gate may move at any
time without prior warning.
Do not let children operate the gate or
play in the gate area.
This entrance is for vehicles only.
Pedestrians must use separate entrance
UL325 MODEL CLASSIFICATIONS
CLASS I – RESIDENTIAL VEHICULAR GATE OPERATOR
A vehicular gate operator (or system) intended for use in a home of one-to four single family dwellings,
or a garage or parking area associated therewith.
CLASS II – COMMERCIAL/GENERAL ACCESS VEHICULAR GATE OPERATOR
A vehicular gate operator (or system) intended for use in a commercial location or building such as a
multi-family housing unit (five or more single family units) hotel, garage, retail store or other building
servicing the general public.
CLASS III – INDUSTRIAL/LIMITED ACCESS VEHICULAR GATE OPERATOR
A vehicular gate operator (or system) intended for use in a industrial location or building such as a
factory or loading dock area or other location not intended to service the general public.
CLASS IV – RESTRICTED ACCESS VEHICULAR GATE OPERATOR
A vehicular gate operator (or system) intended for use in a guarded industrial location or building such
as an airport security area or other restricted access locations not servicing the general public, in which
unauthorized access is prevented via supervision by security personnel.
SAFETY ACCESSORY SELECTION
All UL325 compliant LiftMaster gate operators will accept external
entrapment protection devices to protect people from motorized
gate systems. UL325 requires that the type of entrapment
protection correctly matches each gate application. Below are the
six types of entrapment protection systems recognized by UL325
for use on this operator.
ENTRAPMENT PROTECTION TYPES
Type A: Inherent obstruction sensing system, self-contained
Type B1: Connections provided for a non-contact device, such as
Type B2: Connections provided for a contact sensor. A contact
Type C: Inherent adjustable clutch or pressure relief valve.
Type D: Connections provided for a control
Type E: Built-in audio alarm. Examples
NOTE: UL requires that all installations must
have warning signs placed in plain view on
both sides of the gate to warn pedestrians of
the dangers of motorized gate systems.
within the operator. This system must sense and initiate
the reverse of the gate within two seconds of contact
with a solid object.
a photoelectric eye, can be used as a secondary
protection.
device, such as a gate edge, can be used for secondary
protection.
requiring continuous pressure to
operate the operator open and close.
include sirens, horns or buzzers.
UL325 ENTRAPMENT PROTECTION REQUIREMENTS
GATE OPERATOR ENTRAPMENT PROTECTION
UL325 Slide Gate Operator Swing & Gate Barrier
Installation (Arm) Operator
Class
Class
I & II
Class III
Class IV
Primary
Type
A
A, B1 or B2A, B1, B2,
A, B1, B2
or D
Secondary
Type
B1, B2
or D
D or E
A, B1, B2,
D or E
Primary
Type
A or C
A, B1, B2
or C
A, B1, B2,
C or D
A, B1, B2,
A, B1, B2,
C, D or E
A, B1, B2,
C, D or E
The chart above illustrates the entrapment protection
requirements for each of the four UL325 classes.
In order to complete a proper installation you must satisfy the
entrapment protection chart shown above. That means that
the installation must have one primary means of entrapment
protection and one independent secondary means of
entrapment protection. Both primary and secondary
entrapment protection methods must be designed, arranged
or configured to protect against entrapments in both the open
and close directions of gate travel.
For Example: For a slide gate system that is installed on a
single-family residence (UL325 Class I) you must provide the
following: As your primary type of entrapment protection you
must provide Type A inherent (built into the operator)
entrapment sensing and at least one of the following as your
secondary entrapment protection: Type B1- Non-contact
sensors such as photoelectric eyes, Type B2- Contact sensors
such as gate edges or Type D- Constant pressure control.
5
Secondary
Type
or C
OPERATOR WARNINGS
SAFETY INSTALLATION INFORMATION
1. Vehicular gate systems provide convenience and security. Gate systems are comprised of many component parts. The gate
operator is only one component. Each gate system is specifically designed for an individual application.
2. Gate operating system designers, installers and users must take into account the possible hazards associated with each individual
application. Improperly designed, installed or maintained systems can create risks for the user as well as the bystander. Gate
systems design and installation must reduce public exposure to potential hazards.
3. A gate operator can create high levels of force in its function as a component part of a gate system. Therefore, safety features
must be incorporated into every design. Specific safety features include:
• Gate Edges • Guards for Exposed Rollers • Photoelectric Sensors
• Screen Mesh • Vertical Posts • Instructional and Precautionary Signage
4. Install the gate operator only when:
a. The operator is appropriate for the construction and the usage class of the gate.
b. All openings of a horizontal slide gate are guarded or screened from the bottom of the gate to a minimum of 4' (1.2 m) above
the ground to prevent a 2-1/4" (6 cm) diameter sphere from passing through the openings anywhere in the gate, and in that
portion of the adjacent fence that the gate covers in the open position.
c. All exposed pinch points are eliminated or guarded, and guarding is supplied for exposed rollers.
5. The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate access
opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate such that persons will not
come in contact with the vehicular gate during the entire path of travel of the vehicular gate.
6. The gate must be installed in a location so that enough clearance is supplied between the gate and adjacent structures when
opening and closing to reduce the risk of entrapment. Swinging gates shall not open into public access areas.
7. The gate must be properly installed and work freely in both directions prior to the installation of the gate operator.
8 Controls intended for user activation must be located at least six feet (6') away from any moving part of the gate and where the
user is prevented from reaching over, under, around or through the gate to operate the controls. Outdoor or easily accessible
controls shall have a security feature to prevent unauthorized use.
9. The Stop and/or Reset (if provided separately) must be located in the line-of-sight of the gate. Activation of the reset control shall
not cause the operator to start.
10. A minimum of two (2) WARNING SIGNS shall be installed, one on each side of the gate where easily visible.
11. For a gate operator utilizing a non-contact sensor:
a. Reference owner’s manual regarding placement of non-contact sensor for each type of application.
b. Care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the gate is still
moving.
c. One or more non-contact sensors shall be located where the risk of entrapment or obstruction exists, such as the perimeter
reachable by a moving gate or barrier.
12. For a gate operator utilizing a contact sensor such as an edge sensor:
a. One or more contact sensors shall be located where the risk of entrapment or obstruction exists, such as at the leading edge,
trailing edge and post mounted both inside and outside of a vehicular horizontal slide gate.
b. One or more contact sensors shall be located at the bottom edge of a vehicular vertical lift gate.
c. A hard wired contact sensor shall be located and its wiring arranged so the communication between the sensor and the gate
operator is not subject to mechanical damage.
d. A wireless contact sensor such as the one that transmits radio frequency (RF) signals to the gate operator for entrapment
protection functions shall be located where the transmission of the signals are not obstructed or impeded by building structures,
natural landscaping or similar obstruction. A wireless contact sensor shall function under the intended end-use conditions.
e. One or more contact sensors shall be located on the inside and outside leading edge of a swing gate. Additionally, if the bottom
edge of a swing gate is greater than 6" (152 mm) above the ground at any point in its arc of travel, one or more contact sensors
shall be located on the bottom edge.
f. One or more contact sensors shall be located at the bottom edge of a vertical barrier (arm).
6
1-1/2" (37 mm)
1/4" (6 mm) or larger
depending on loop
wire size
Interrupt
(Safety)
Loop
Seal loops
Loop wire layer
12' (3.7 m)
6' (1.8 m)
Close
Edge
Gate 2
Open
Edge
Photo eyes for
open cycle
Photo eyes for
close cycle
4' (1.2 m)
Typical
4' (1.2 m)
Typical
Open
Edge
Photo eyes for
open cycle
Run twisted wire
from loop
to operator
STREET
COMPLEX
OR
PARKING LOT
Gate 1
Interrupt
(Safety)
Loop
4'
(1.2 m)
Typical
Photo eye for
open cycle
Photo eye for
close cycle
8' (2.4 m)
Open
Edge
Telephone
Entry
System
1-1/2" (37 mm)
1/4" (6 mm) or larger for loop
wire width depending on loop
wire size
STREET
Run twisted wire
from loop
to operator
Seal loops
Loop wire layer
Close
Edge
COMPLEX
OR
PARKING LOT
Interrupt
(Safety)
Loop
Interrupt
(Safety)
Loop
4' (1.2 m)
Typical
4' (1.2 m)
Typical
4'
(1.2 m)
Typical
4' (1.2 m)
Typical
SUGGESTED ENTRAPMENT PROTECTION DEVICE LOCATIONS
GATE SYSTEM (MASTER/SECOND SLIDE GATE)
GATE SYSTEM (COMMERCIAL SLIDE GATE)
7
Moving Gate Can Cause
Injury or Death
KEEP CLEAR! Gate may move at any
time without prior warning.
Do not let children operate the gate or
play in the gate area.
This entrance is for vehicles only.
Pedestrians must use separate entrance
SAFETY PRECAUTIONS FOR OPEN ROLLER GATES
WARNINGWARNING
WARNING
WARNINGWARNING
WARNING
• Injuries occur when people get their hands or feet caught
between the top or bottom of the gate and the gate roller.
These potential pinch-points should be guarded against at
ALL times. Enclosed style gate tracks are available for
refitting of these rollers from many fence suppliers. Also,
roller guards are available for installing over the rollers.
• UL325 requires that, when used, contact sensors shall be
located at the leading edge, trailing edge and be post
mounted both inside and outside of a vehicular horizontal
slide gate. Non-contact sensors such as photo eyes MUST
protect during both open and close gate cycles.
• Injuries occur when people put their hands and arms
through openings in the grill while the gate is operating.
They cannot retract their arm and it gets caught between the
moving gate grill and the stationary fence post or fence. This
potential hazard can be averted by placing a 4' (1.2 m)
screen mesh on the gate to prevent access through openings
anywhere the gate may travel. See Safety Brochure for
details. To prevent entrapment injuries, mount controls at
least 6' (1.8 m) from the gate or ANY moving parts of the
gate.
Gate Edge on Rear
of Gate for Open
Direction
Photo Beam
for Open
Direction
Pinch-Point
Hazard
Gate Edge
Gate Edge on Fence Post
for Open Direction
UNIT
Additional Post Mounted Gate
Edge for Close Direction
Pinch-Point
Hazard
Vertical Post Placed on Both
Sides of the Exposed Rollers
Can Prevent Hands From
Reaching These Pinch-Points
Gate Edge on
Leading Edge of Gate for
Close Direction
Photo Beam for
Close Direction
Additional Post Mounted Gate
Edge for Open Direction
Always Test Gate Edges and
Photo Beams Anytime They Are
Adjusted or Serviced
Gate Edge for
Gate Edge for
Open Direction
Close Direction
DO NOT MOUNT ACCESSORIES THAT ARE ACCESSIBLE
THROUGH GATE!
WARNING SIGN PLACEMENT
To prevent SERIOUS INJURY or DEATH from a moving gate:
• Install Warning signs on EACH side of gate in PLAIN VIEW.
• Permanently secure each Warning sign in a suitable manner
using fastening holes.
NOT FOR USE AS PEDESTRIAN PASSAGE! This operator is
intended for vehicular use only. To prevent INJURY to
pedestrians, a separate pedestrian access should be supplied,
visible from the gate. Locate the pedestrian access where there is
not a chance of INJURY at any point during full movement of the
gate.
Gate Edge for
Close Direction
8
WARNING
WARNINGWARNING
WIRING
To reduce the risk of SEVERE INJURY or DEATH:
• ANY maintenance to the operator or in the area near the
operator MUST NOT be performed until disconnecting the
electrical power and locking-out the power via the operator
power switch. Upon completion of maintenance the area
MUST be cleared and secured, at that time the unit may be
returned to service.
• Disconnect power at the fuse box BEFORE proceeding.
Operator MUST be properly grounded and connected in
accordance with local electrical codes. NOTE: The operator
should be on a separate fused line of adequate capacity.
• ALL electrical connections MUST be made by a qualified
individual.
• DO NOT install ANY wiring or attempt to run the operator
without consulting the wiring diagram. We recommend that
you install an optional reversing edge BEFORE proceeding with
the control station installation.
• ALL power wiring should be on a dedicated circuit and well
protected. The location of the power disconnect should be
visible and clearly labeled.
• ALL power and control wiring MUST be run in separate
conduit.
• BEFORE installing power wiring or control stations be sure to
follow ALL specifications and warnings described below.
Failure to do so may result in SEVERE INJURY to persons and/
or damage to operator.
POWER WIRING INSTALLATION
Wiring Specifications (STRANDED COPPER WIRE)
On a Dual Gate System, each unit must be installed on ITS OWN separate circuits.
115 VAC 230 VAC
SINGLE PHASE
WIRE GAUGE 6
• 1/2 HP Motor ------- 425 ft. (129.5 m) 1845 ft. (562.4 m) 2557 ft. (779.4 m) 12789 ft. (3898.1 m) 15987 ft. (4872.8 m)
230 VAC 460 VAC 575 VAC
THREE PHASE
WIRE GAUGE 8
• 1/2 HP Motor ------- 269 ft. (82 m) 1165 ft. (355.1 m) 1614 ft. (492 m) 8072 ft. (2460.4 m) 10089 ft. (3075.1 m)
WIRE GAUGE 10
• 1/2 HP Motor ------- 168 ft. (51.2 m) 730 ft. (222.5 m) 1012 ft. (308.5 m) 5064 ft. (1543.5 m) 6330 ft. (1929.4 m)
WIRE GAUGE 12
• 1/2 HP Motor ------- 105 ft. (32 m) 458 ft. (139.6 m) 634 ft. (193.2 m) 3171 ft. (966.5 m) 3964 ft. (1208.2 m)
NOTE: Calculated using NEC guidelines. Local codes and conditions must be reviewed for suitability of wire installation. All power
wiring should be dedicated and protected. Location of primary power disconnect should be labeled.
9
INSTALLATION
PAD MOUNTING
RETRO-FIT INSTALLATION
The operator is shipped from the factory with the lower mounting
angles configured out (Figure 1). If you have pad constrictions,
either angle can be unbolted and reversed to ‘angle in’.
NOTE: If you are replacing an SL540/SL570 and wish to use the
same pad mounting hardware, the gate side mounting angle must
be installed angle in.
NEW INSTALLATION
Concrete Pad Preparation:
1. Lay out concrete pad. (Figure 2).
2. Locate electrical conduit, as required, prior to pouring
concrete.
3. Pour concrete pad.
4. Secure operator (Figure 3) to the concrete pad using four 1/2"
concrete anchors (not provided).
Figure 1
Angle In
Angle Out
Figure 2
Rear of Gate or
Back Frame
Fence In
1" (2.5 cm)
4" (10.2 cm)
10-7/8"
(27.6 cm)
7"
(17.8 cm)
Figure 3
Using Suitable Hardware To
Secure Operator To Concrete
Anchors
Concrete Pad
1/2" Concrete
Anchors
(4 Required)
21-1/8" (53.7 cm)
36" (91.4 cm)
18" (45.7 cm)
Concrete
Anchor Holes
Drive and Idler
Sprocket Toward
Gate Side
Power and Control Wiring
Should Be Run In
Separate Conduit
2" to 4"
(5.1 to 10.2 cm)
Above Grade
Depth Required By
Local Codes or Below
Frost Line
10
POST MOUNTING
RETRO-FIT INSTALLATION
The operators come from the factory configured to mount to an
inside the frame post mount dimension of 26" (outside to outside
of posts). The frame comes slotted to accommodate posts
24-1/8" to 26", outside to outside (Figure 1).
NOTE: If you are replacing a SL540/SL570, the frame will require
adjustment to 24-1/8".
NEW INSTALLATION
1. Locate and anchor two posts made of 3" (7.6 cm) outer
diameter heavy walled pipe. Posts should be parallel and
square to the gate (Figure 2).
2. Locate electrical conduit, as required, prior to pouring
concrete.
3. Secure operator (Figure 3) to posts using four 3" (7.6 cm)
U-bolts and hardware provided.
Figure 1
Figure 2
26" (66 cm)
Post to Post Adjustment
24-1/8" (61 cm)
End Post
Fence Line
Figure 3
8.5" (21.6 cm)
6" (15.2 cm) Min.
3" (7.6 cm) Outside
Diameter Heavy Wall
Fence Pipe
Angle
Bracket
26" (66 cm)
Outside To Outside
14" (35.6 cm) Min.
Ground Level
Depth As Required By
Local Codes or Below
Frost Line
Drive and Idler
Sprocket Toward
Gate Side
3" (7.6 cm) U-bolt
(4 required)
11
Power and Control Wiring
Should Be Run In Separate
Conduit
**
INSTALL GATE BRACKET & DRIVE CHAIN
WARNING
CAUTIONCAUTION
WARNING
WARNING
To prevent damage to the operator or gate, DO NOT drive the
limit (nuts) actuators on the shaft past their normal positions.
1. Mount gate brackets to the vertical front and rear posts of the
gate (Figure 1).
2. Remove the operator cover.
3. Locate and engage the manual disconnect and lock it in place
(refer to page 12).
4. Connect chain take-up bolt to the end of the chain and attach
to the rear gate bracket (Figure 2).
5. Ensure that the drive and idler sprockets are in line with each
other. Thread the chain through the plastic chain guide, around
drive and idler sprockets, and then through the second plastic
chain guide toward front gate bracket (Figure 3).
6. Adjust the chain to proper length and attach second take-up
bolt to chain end. Secure the take-up bolt to the front gate
bracket as shown.
Figure 1
Figure 2
Gate
2" (5.1 cm) U-bolts
with Lock Washers
and Nuts
Gate Bracket
“Outside”
“Inside”
Anti-Rotation
Set Screw
Adjust nuts on chain take-up bolts to remove chain slack. A
general rule of thumb is to leave a maximum of 1" (2.5 cm) of
chain slack for every 10' (3 m) of chain length.
Do not overtighten chain.
NOTE ABOUT SOME TYPES OF CANTILEVER GATES:
With some cantilever gates over 20' (6 m) long, you may need to
add a brace along the length of the gate to prevent the gate from
bowing when chain is tightened. This may also be required on
some styles of gates that are constructed out of aluminum. If
positioned properly, this brace can also be used as a chain
support.
Gate Bracket
Figure 3
Idler Sprocket
* Gate Brackets must be level and centered
with bottom of Idler Sprocket
Drive Sprocket
Gate Post
Idler Sprocket
Insert chain through plastic guides
Safety Bracket
12
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