Chamberlain HS670 User Manual
CONTROLLER BOARD
GL
Serial # ________________________
(located on electrical box cover)
Installation Date __________________
2 YEAR WARRANTY
MODEL HS670 IS FOR VEHICULAR PASSAGE GATES ONLY AND
ARE NOT INTENDED FOR PEDESTRIAN PASSAGE GATE USE
MODEL HS670
HEAVY DUTY HYDRAULIC SLIDE GATE OPERATOR
2
CARTON INVENTORY
Before beginning your installation check that all components
were supplied and received undamaged. Refer to list below
for factory supplied parts.
Description Qty.
Bolt 1/4-20 (for Limit Shoe) 4
Lockwasher 1/4 4
Hex Nut 1/4-20 4
Screw #10-24 (for Gate Stop) 4
Lockwasher #10 4
Hex Nut #10-24 4
Limit Shoe 2
Gate Warning Sign 2
Vent Cap 1
Gate Stops 2
PBS, Stop 1
HARDWARE KIT
When you see the above 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.
IMPORTANT NOTE
• BEFORE attempting to install, operate or maintain the operator,
you MUST read and fully understand this manual and follow all
safety instructions.
• DO NOT attempt repair or service of your commercial door and
gate operator unless you are an Authorized Service Technician.
TABLE OF CONTENTS
OPERATOR SPECIFICATIONS
Carton Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Operator Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Operator Dimensions and 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
INSTALLATION
Concrete Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Drive Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operator Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Vent Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Limit Shoes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Gate Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Suspension System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
WIRING
Power Wiring Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
On/Off Switch Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . .13
ADJUSTMENT
Hall Effect Sensor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .14
Force Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
PROGRAMMING
UL325 Entrapment Protection . . . . . . . . . . . . . . . . . . . . . . . . . .15
Control Board Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Program Settings (DIP Switch) . . . . . . . . . . . . . . . . . . . . . .17-18
Programming the Radio Receiver . . . . . . . . . . . . . . . . . . . . . . .19
OPTIONAL CONTROL DEVICES
Sequenced Access Management System (SAMS) . . . . . . . . . . .20
Accessory Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Control Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . .22
OPERATION AND MAINTENANCE
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . .23
TROUBLESHOOTING
GL Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Electrical Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . .25-26
Hydraulic System Troubleshooting . . . . . . . . . . . . . . . . . . . . . .27
Mechanical Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Hydraulic System Information . . . . . . . . . . . . . . . . . . . . . . .28-29
SINGLE PHASE WIRING DIAGRAM
. . . . . . . . . . . . .30
THREE PHASE WIRING DIAGRAM
. . . . . . . . . . . . . .31
ELECTRICAL BOX
. . . . . . . . . . . . . . . . . . . . . . . . . . .32
ILLUSTRATED PARTS
. . . . . . . . . . . . . . . . . . . . . . . .33
WARRANTY POLICY
. . . . . . . . . . . . . . . . . . . . . . . . .34
OPERATOR NOTES
. . . . . . . . . . . . . . . . . . . . . . . . . .35
REPAIR PARTS AND SERVICE
. . . . . . . . . . . . . . . . .36
Mechanical
Electrical
WARNING
CAUTION
WARNING
WARNING
WARNING
WARNING
WARNING
3
G. LIMIT SWITCH
All limit switches are oil tight and watertight, and of NEMA 3, 4,
and 13 construction. Open switch for right hand, close switch for
left hand.
H. DRIVE WHEELS
Drive wheels are constructed of polyurethane material on a steel
hub and have a hardness factor of 95. HS670 1HP = 1 1/2" wide,
6" diameter; HS670 2HP= 2" wide, 6" diameter.
I. HYDRAULIC MOTOR
Roller vane, free wheeling type with a displacement of 12 cubic
inches per revolution.
J. SUSPENSION SYSTEM
Incorporates two compression springs. HS670 1HP and HS670
2HP use different compression springs. See also page 11.
K. HALL EFFECT (RPM) SENSOR ASSEMBLY
OPERATOR SPECIFICATIONS
OPERATOR FEATURES
A. MOTOR 1 AND 2 HP
The motors used in the HS670 GC and HS670 GI are T.E.F.C.
(totally enclosed, fan cooled) and operate at 3450 R.P.M. They
incorporate a built-in manually resettable thermal overload.
B. DIRECTIONAL VALVE
Directional valve is 3 position, 4 way. It incorporates 2 solenoids
which are 24 VDC. The power required for operation is rectified
from 24 VAC.
C. HYDRAULIC BRAKE
Dual valve system limits gate over travel.
D. BYPASS VALVE
Incorporates a handle at side of pump. When positioned
downward, it will allow manual operation of the gate.
E. RELIEF VALVE
Built into pump. Set at 600 p.s.i. for HS670 1HP and 1500 p.s.i.
for HS670 2HP.
F. VENT CAP
When removed, you may add hydraulic oil. Must be on during
operator operation.
H
G
F
D
E
B
C
A
I J
K
G
4
OPERATOR SPECIFICATIONS
MODEL HS670 GC
• 1 HP Motor
Gate Speed – 12"/sec.
Maximum Gate Weight – 3000 lbs.
Maximum V-Track Gate Width – 80 ft.
MODEL HS670 GI
• 1 HP Motor
Gate Speed – 18"/sec.
Maximum Gate Weight – 3000 lbs.
Maximum V-Track Gate Width – 80 ft.
MODEL HS670 GI
• 2 HP Motor
Gate Speed – 18"/sec.
Maximum Gate Weight – 5000 lbs.
Maximum V-Track Gate Width – 80 ft.
OPERATOR DIMENSIONS AND HORSEPOWER CHART
29-3/4"
31-3/4"
27"
19-3/4"
14"
26-1/2"
5
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 – COMMERCIAL/GENERAL 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 recognized by UL325 for use
on this operator.
ENTRAPMENT PROTECTION TYPES
Type A: Inherent obstruction sensing system, self-contained
within the operator. This system must sense and initiate
the reverse of the gate within two seconds of contact
with a solid object.
Type B1: Connections provided for a non-contact device, such as
a photo eye can be used as a secondary protection.
Type B2: Connections provided for a contact sensor. A contact device
such as a gate edge can be used for secondary protection.
Type C: Inherent adjustable clutch or pressure relief valve.
Type D: Connections provided for a control requiring continuous
pressure to operate the operator open and close.
Type E: Built-in audio alarm (e.g., sirens, horns or buzzers).
NOTES:
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.
Model HS670 meets the following specifications:
UL325 ENTRAPMENT PROTECTION REQUIREMENTS
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 photo-eyes, Type B2- Contact sensors such
as gate edges or Type D- Constant pressure control.
GATE OPERATOR ENTRAPMENT PROTECTION
Class
I & II
Class III
Class IV
A, B1, B2,
C or D
A, B1, C,
D or E
A, B1, B2,
D or E
A, B1, B2
or D
A, B1 or B2A, B1, B2,
D or E
A, B1, B2
or C
A, B1, B2
C or D
A or C
B1, B2
or D
A
UL325 Slide Gate Operator Swing & Gate Barrier
Installation (Arm) Operator
Class
Primary
Type
Secondary
Type
Secondary
Type
Primary
Type
D or E
OPERATOR SPECIFICATIONS
MODEL CLASS 1 CLASS 2 CLASS 3 CLASS 4
HS670 GC
HS670 GI N/A N/A
UL325 MODEL CLASSIFICATIONS
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
6
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).
OPERATOR WARNINGS
7
Close
Edge
Open
Edge
Run Twisted Wire
From Loop
To Detector
Seal Loops
4'
4'
Typical
4'
Typical
Interrupt
Loop
Photo Eye For
Close Cycle
4'
Typical
STREET
8'
Sentex Telephone Entry
System / Access Control
COMPLEX
OR
PARKING LOT
Interrupt
Loop
Loop Wire
Layer
1/4" Or As Required
For Loop Wire Width
1-1/2"
Photo Eye For
Open Cycle
Typical
4'
Typical
6"
Interrupt
Loop
Second
Unit
Open
Edge
Photo Eyes For
Close Cycle
Photo Eyes For
Open Cycle
STREET
1-1/2"
COMPLEX
OR
PARKING LOT
Interrupt
Loop
4'
Typical
6'
12'
Typical
4'
Typical
Loop Wire
Layer
1/4" Or As Required
For Loop Wire Width
Master
Unit
Close
Edge
Run Twisted Wire
From Loop
To Operator
Seal Loops
Photo Eye For
Open Cycle
Open Edge
*Refer to loop manufacturer’s instructions for detailed installation and loop wiring instructions.
GATE SYSTEM (MASTER/SECOND SLIDE GATE)
GATE SYSTEM (COMMERCIAL SLIDE GATE)
OPERATOR WARNINGS
SUGGESTED ENTRAPMENT PROTECTION DEVICE LOCATIONS
8
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.
WARNING SIGN PLACEMENT
SAFETY PRECAUTIONS FOR OPEN ROLLER GATES
AND ORNAMENT “GRILL TYPE” GATES
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.
• Do NOT mount accessories that are accessible through
gate.
• 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' 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'
from the gate or any moving parts of the gate.
WARNING
WARNING
WARNING
WARNING
OPERATOR WARNINGS
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
Photo Beams Anytime They Are
Pinch-Point
Hazard
Vertical Post Placed on Both
Sides of the Exposed
Rollers Can Prevent Hands
From Reaching These
Pinch-Points
Gate Edge
for Open Direction
Gate Edge on
Leading Edge of Gate
for Close Direction
Photo Beam for
Close Direction
Additional Post Mounted Gate
Edge for Open Direction
Always Te st Gate Edges and
Adjusted or Serviced
Gate Edge
for Close
Direction
Open Gate Edge
OR
Unit
Close Photo Beam
Open Gate Edge
OR
Open Photo Beam
Gate Edge for
Close Direction
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
9
NOTES: Installation shown is for a right-handed unit (on right
side of gate opening when inside looking out). Left-handed is
opposite. For left-handed conversion, see page 17.
If there is suitable existing concrete at area of unit mounting, use
dimensioning procedure described in step 1. Conduit locations
may require modifications to suit your application.
CONCRETE PAD
1. Layout concrete pad as detailed.
2. Locate conduit, as required, prior to pouring concrete.
3 Pour concrete pad. The pad must be level and above the
ground line. Pad must be a minimum of 24" in depth or below
the frost line, whichever is greater.
4. Allow concrete to set at least 2 days before installing unit.
5. Locate (4) 1/2" concrete anchors (not provided ) or other
means of fastening as shown. Anchors must be positioned
accurately and secure in the concrete.
NOTE: Always use separate conduits for power wiring and
control wiring.You may want to install extra conduit for future
wiring considerations. For detailed information on the emergency
disconnect system, see instructions provided with it. This is only
a suggested layout, other pad layouts are possible.
DRIVE RAIL
1. Mark the location to install drive rail 11-1/2" from the top of
concrete pad. The drive rail should be the gate opening width
plus 3' to 4'. The drive rail must be level and parallel to the
gate and operator.
2. Fasten the drive rail securely to the gate and backframe.
IMPORTANT NOTE: Make sure that the drive rail and wheels are
aligned properly.
OPERATOR MOUNTING
1. Remove cover by loosening bolts on each side of cover and
remove bolt from the front of the cover. Lift cover off.
2. Secure operator to the concrete pad using (4) 1/2" concrete
anchors (not provided) with the drive wheels facing the gate.
The operator must be level and parallel with the gate and drive
rail.
NOTE: Loosen the bolts that secure the mounting legs to the unit.
The distance between the operator and the rail can then be
slightly adjusted. After adjustment, retighten the bolts.
INSTALLATION
“Gate”
Shown
Open
As
Required
2.75
5.88
Power Conduit
Entrance
Drive Rail
Section
Anchor Location
Marked "Z"
Z
Optional Emergency
Disconnect
Z
4.13
To Attach Drive
Rails Together:
1.75
35.00
1.75
3.00
1.75
1.75
Drive Rail
Section
3.75
Z
Z
+7.50
14.00
26.50
3.88
+ = Critical Dimension
Mounting Hardware
Optional
Drive Rail
11-1/2"
Pad
By Others
10
INSTALLATION
VENT CAP
1. Remove the threaded plug from the pump tank.
2. Install the vent cap.
NOTE: Never run the operator without the vent cap installed.
LIMIT SHOES
NOTE: The limit shoes are slotted, so minor adjustments may be
made later for the fine tuning of the fully open and close
positions. Also, note that the limit switches themselves may be
slightly adjusted up or down.
1. Cut wire ties to release limit switch levers and RPM assembly
to the up right position. These items are held down by wire ties
to facilitate for initial gate installation.
2. Manually open the gate to the full position.
3. Locate the open limit switch lever and mark its position.
4. Manually close the gate to the full close position.
5. Locate the close limit switch lever and mark its position on the
drive rail.
6. Manually open the gate about halfway. Measure and drill holes
to mount limit shoes
7. Secure both limit shoes to underside of drive rail.
NOTE: It is highly suggested that gate stops be installed to the
gate at the fully open and closed positions. See next page for
installation instructions.
IMPORTANT: Do Not
Use Cover Handles
to Move Unit
Loosen Screw to
Remove Cover
Remove Bolt to
Take Cover Off
Vent Cap
Threaded
Plug
Ta nk
TOP
VIEW
TOP
VIEW
SIDE
VIEW
1-1/16"
RPM Assembly
Mark Centerline Mark Centerline
Drive Rail
Limit Switch Limit Switch
2"
3"
1/4"-20 Screw
Limit Shoe
Centerline Marks
Washer & Nut
2"
9/32" Diameter
Holes
3"
Bottom of
Drive Rail
11
INSTALLATION
GATE STOPS
1. When properly installed the gate will open or close in
approximately 3" to 4" after limit shoe shuts the unit off, the
“gate stop” will contact the upper drive wheel stopping the
gate.
2. After operator has been installed the limit shoes have been
attached to the top of the drive rail, locate and install the (2)
“gate stops” to the top of the drive rail.
NOTE: The 7" dimension is a reference. You may have to adjust
this slightly for your particular application.
SUSPENSION SYSTEM
1. The suspension system is semi-factory set; simply loosen the
suspension separator bolt completely. This will allow both
wheels to pinch the drive rail.
NOTE: It is suggested that the separator bolt be removed and left
with unit. If it is not removed, make sure that it can not interfere
with suspension system.
2. If more or less pressure is required, adjust both upper and
lower suspension spring lock nuts as desired. Both springs
should apply about the same amount of pressure.
IMPORTANT:
If using the LiftMaster drive rail, make sure that the drive rail
guide wheel is positioned properly.
It is very important that the suspension system is adjusted
properly. This system puts pressure on the drive wheels so they
can pinch together on the drive rail. This system also allows the
drive wheels to “float” so they can follow any slight misalignment
of the drive rail. If the springs are over tightened, it will reduce
their life span. But, on the other hand, if they are under tightened,
the drive wheels may slip on the drive rail.
MANUAL OPERATION
NOTE: When manually opening or closing the gate, it is not, in
the beginning, easy to get the gate started. Since fluid has
accumulated in the drive motors, it may take more force to get
the gate started.
The pump is equipped with a manual bypass valve. By positioning
the valve handle down (manual operation), the gate can be
manually opened or closed.
NOTE: A back-up to this is the suspension separator bolt. By
tightening this bolt, the drive wheels will be pushed off by the
drive rail.
Limit
Shoe
Gate Stop
Lock Adjustment
Lower Nut
(Use 3/4" Wrench)
7"
Screw
Gate Stops
Limit Shoe
7"
Limit
11/16"
Shoe
11/16"
Hex Nut
Upper
Drive
Wheel
Separator Bolt
(Use 9/16" Socket)
Guide Wheel (provided on
operator for use with Liftmaster
Drive Rail)
Upper
Drive
Wheel
Drive
Rail
Guide
Wheel
Lower
Drive Wheel
Bypass Valve Handle In
Automatic Position
Rotate 90˚ (Down) for
Manual Operation
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