These instructions are provided as a quick reference guide to the experienced installer that is already familiar with
all safety precautions and the installation of this gate operator. Do not attempt to install from this guide if you are
inexperienced with this product.
Using four 1/2” x 4 1/2” anchor bolts mount the operator to a concrete slab which reaches below the local
1.
frost line. If necessary, use shims to level the base.
2. If installing the DC version of the operator, be careful to mount the battery power supply box very near the
control enclosure because of the high current demand by the DC motor. Note: For the DC version, refer
to Section 8 of the operator handbook.
Connect the electrical power to loose wires from the On/Off switch and a grounding wire to the lower left
3.
corner of the electrical panel. Be certain the labeled voltage and phase of the operator matches the
available supply.
Turn on the power switch. The Smart Touch LCD display should show, after a 2-second delay, the
4.
characters [uC_0]. This is a setting for the UL user class that must be made before any function will be
possible. Press the Select button, then the Next button and change the 0 to be class 1-4 as appropriate
for the site. Press the Select button again to lock the setting.
Press the Menu button and the display will jump to the close timer setting [Ct_0]. If a close timer function
5.
is needed, set in the same manner as above. Press the Menu button again to exit to the Run Mode. The
LCD display should now read StoP, CloS or OPEn.
If the operator contains more than four counterweights per side, the arm must be mounted before the
6.
gate operator can be allowed to function. Otherwise, test for normal operation of the gate.
Install the barrier arm and clamp securely. Single arms, up to 18’ maximum can be installed on either the
7.
left or right side of the operator. Arms longer than 26’ include anti-sway cable harnesses that must also
be attached.
Run the operator and verify normal smooth operation. If the arm stops abruptly at the end of travel, it
8.
may be necessary to adjust either of the open or close brake valves and/or a limit switch setting. There
are two brake valves on the pump manifold and the one closest to the motor controls the stopping of the
arm in the closing direction. The open direction stop control is with the brake valve just to the left. If
adjustment of either brake valve is necessary, loosen the 9/16” lock nut and turn the adjuster screw with
an Allen wrench. A CCW adjustment will stop the arm more quickly. The limits must be set to trigger
about 10 degrees of arc before the arm has reached full travel. If adjustment of the limit switches is
necessary, slightly loosen the set screws on the cams at the top of the operator and set the limits to trip
early enough to ensure a smooth stopping arm. For detailed instructions on barrier arm adjustments,
review the page titled HTG 320 Adjustments in the handbook.
Connect any required accessory device wiring. Note that the various inputs are all one wire only to the
9.
main terminal strip while the other wire connects to the Common Buss on the nearby power supply board.
10. To access the User menu in the Smart Touch Controller, simply press the Menu button while there is no
active Open or Close input. The display will scroll system values and stop at the [Ct__] close timer
setting. There are 12 menu items in the User Menu. To reach the more detailed Installer menu, the
system must be in the User Menu first, then simultaneously press Open and Reset. The display will go to
[uC__] which is the first of 32 items in the Installer Menu. Read the instructions before attempting any
adjustments!
Installation and Maintenance Manual
Smart Touch Controller Menu Guide for the HTG 320
To gain access to the User Menu, press the Menu button when the gate is stopped. The LCD
will scroll through key several items, then stop at the close timer setting [Ct ].
User Menu Options Default Description
U1
[Ct 0] Close timer setting 0 0 = Close timer off or 1 – 99 seconds
U2
[hC 0] Momentary Close 0 0 = momentary, 1= Constant hold PB required to close gate
U3
[ho 0] Momentary Open 0 0 = momentary, 1= Constant hold PB required to open gate
U4
[AP 0] AC Power loss function 0 0 – 3 (0 =Type A, 1 = B, 2 = C, 3 = D) See handbook
U5
[ro 0] Radio control option 0 0 = Open only, 1 = Adds Close capability when fully open
U6
[bF 2] Warn before operate 0 0 = none, 1 = Buzzer alerts 3 sec before & when in motion,
2 = Buzzer alerts 3 sec before + first 2 seconds in motion
U7
[FA 0] Forced open Alert and
automatic gate reposition
U8
[dA 0] Drift Closed Alert and
automatic gate reposition
U9
[PE 0] Photo Eye Align Mode 0 0= off, 1 = on (auto reset to 0 when close limit triggered)
U10
[CL 0] Clock set (24 hour type) 0 0= display, 1= set mins, 2= set hours, 3= set day, 4= month
U11
[Ld 5] LCD Contrast set 5 1 - 9 = Adjusts contrast of the display
U12
dS 0] Data Log (New Gen only) 0 0 = Std. 1 = Extended (reset to 0 in 24 hr) (V4.xx software)
Note for U6 – The Warn before operate buzzer is an accessory device for the HTG operator.
To access Installer Menu, press the Open & Reset buttons together while in the User Menu.
Installer Menu Options Default Description
I1
[uC 0] Set UL Usage Class 0 0 = Gate disabled, Set Class 1 through 4 use
Welcome – We would like to take this opportunity to thank you for this
purchase. HySecurity has manufactured the finest hydraulic gate operators
available since the 1970s. Our commitment to quality and innovation will
become evident as you become familiar with the features and performance of
this expertly engineered machine. All HySecurity operators are equipped
with the Smart Touch Controller, a digital electronic brain that offers
unparalleled features.
Please take a few minutes to study the contents of this instruction manual.
The benefits of taking a little extra time to align the gate operator properly and
to verify a fully functional installation will ensure customer satisfaction and a
longer life with minimal maintenance costs.
Installers and owners must be certain to thoroughly review and
understand the Important Information regarding pedestrian entrapment
Installation and Maintenance Manual
protection contained within this manual. There are hazards associated
with automatic gates that can be greatly reduced with proper design,
installation use. When an automatic gate is first made functional, the
installer must teach the owners and users how to operate this system
correctly. When the installation is complete, leave this manual for the
owner’s use and reference.
Please do not hesitate to give your HySecurity distributor a call if you
experience any difficulties during the installation. They are experienced and
trained to assist in resolving any problems.
v
Installation and Maintenance Manual
For warranty registration, please fill in this information, fax or mail a copy
to HySecurity, then give this manual to the owner of the gate operator.
Serial number of operator: ___________________________________
Date Installed: ____________________________________________
Model of Operator: ________________________________________
Warranty Registration
HySecurity Address:
6623 South 228
th
Street
Kent, WA 98032
FAX: (253) 867-3702
Date: ___________
vi
Available Models and Features
Features
Horsepower
Rate of Travel to
Open
UL Usage Class
Warranty
Soft Stop
Brake Valves
Soft Start
Arm Capacity
Arm Options
Stopping the Gate
All models employ a time delay Soft Stop system.
Additionally, brake valves (shown at right) are used to control
the smooth stopping of the gate. These valves are exclusive
to HySecurity’s operators. They are independently adjustable
to allow the gate to stop predictably without banging.
Starting the Gate
When starting very heavy barrier arms, it is necessary to Soft
Start the load gently, in addition to stopping it smoothly.
HySecurity accomplishes Soft Start with another exclusive
feature we call an AWOG, which diverts some of the start-up
hydraulic flow and thereby allows the gate to gently
accelerate. This is much like letting your foot slowly off a car
clutch – no lurching when the gate starts. The AWOG
improves the life and performance of a gate system and never
needs adjustment.
NOTE: This feature is standard on the HTG 320-8 only.
HTG 320-3
Three seconds to open,
four seconds to close,
20 ft arms; aluminum or
aluminum/fiberglass
designs
¾ ¾ ¾
3 seconds 5 seconds 8 seconds
1-4 1-4 1-4
5 years 5 years 5 years
Yes Yes Yes
Yes Yes Yes
No No Yes
20 feet 28 feet 36 feet
1x6” wood single arms to 14’
2x5” tubular aluminum arms to 24’
2x5” aluminum/fiberglass arms to 36’
HTG 320-6
Five seconds to open,
seven seconds to
close, 28 ft arms;
aluminum or
aluminum/fiberglass
designs
1
Installation and Maintenance Manual
HTG 320-8
The heaviest duty of
the operators, (shown
at left) will handle arms
up to 36 feet long.
Eight seconds to open
and close.
Installation and Maintenance Manual
Available Models and Features
Features:
Simple & Reliable Hydraulic Design
No gearbox, belts, linkages or clutches
to maintain
Design Rate: 2000 cycles per day
5-year Limited Warranty
Heavy Duty Components
¾ HP motor handles arms up to 36’ in
length
Anti-corrosion Finish
Entirely electroplated, then coated with
Heavy duty yoke
mount for arms
longer than 16’
a high gloss powder paint finish. The
(-6 & -8 models are galvanized and
include a stainless steel cover)
The Smart Touch Controller (Standard)
This is the brain of the all HySecurity’s automatic operators. Truly high technology, but is also very rugged
to reliably serve in the harsh environments that exist in the real world. The Smart Touch Controller is also
very smart and can quickly be configured by an installer or user to adapt to about any functional
requirement of a specific site. All system settings are performed with the use of just five programming
buttons and an LCD display. The Smart Touch Controller has no switches of any type to set. An RS232
port is for external communication is standard. The system also has a real time clock and an EEPROM to
record system events. The log of events can be downloaded from the RS232 port with a PC and serial
cable. Our optional vehicle detector modules set a new industry standard by communicating a host of
valuable performance data to the microprocessor in the Smart Touch Controller via a serial data stream,
providing user-friendly diagnostics.
DC 24-Volt UPS Operators (Optional)
These gate operators function from 24 Volts DC all of the time to achieve a true UPS system. Our
Uninterruptible Power Supply is the most certain way to know that your gate will work when the AC
power fails. This system features fully sealed maintenance free batteries in a separate insulated and
ventilated enclosure. This two-battery system provides at least 1,000 full open & close operations in the
event of AC power loss.
2
Counterweights
required for arms
over 18’
Installation and Maintenance Manual
READ THIS FIRST!
Important Information – Review Before Installation
Automatic gate operators provide convenience and security to users. However, because these
machines can produce high levels of force it is important that all gate operator system designers,
installers and end users be aware of the potential hazards associated with improperly designed, installed
or maintained systems. Keep in mind that the gate operator is only one component of the total gate
operating system. It is the joint responsibility of the specifier, designer, purchaser, installer and end user
to verify that the total system is appropriately configured for its intended use. All parties should be
informed that entrapment in a moving gate could cause serious injury or death.
Common
Industry
Symbols
Attention
-Take Note-
-Danger-
Keep Away
Entrapment
Zone
Important Instructions for Gate System Designers & Installers:
WARNING: To reduce the risk of serious injury or death, read and follow all instructions in the
gate operator handbook and on the warning labels.
Install an Automatic Barrier Arm Gate Operator only When:
Automatic gates are for vehicular use only! Provide walkways and signs to direct
pedestrians and bicycles to a separate walk-through entrance. Because an
automatic gate can start at any time without warning, always keep people away
from the area of the gate. The Warning labels that have been supplied with this
operator must remain installed, in manner clearly visible, in the area of both sides
of the gate.
All exposed pinch points are to be guarded. To reduce the risk
of entrapment, the gate operator must also be installed so that at least two feet of
clearance is provided between the operator, barrier arm and adjacent structures
both when opening and closing.
The barrier arm must not to be modified in any way that creates a risk of
entrapment or a possibility that some portion of the moving arm could snag onto
the clothing of a pedestrian that happened to be nearby. Specifically prohibited
are any chains or other material attached to the barrier arm that may create such
a hazard.
Possible
Pinch Point
3
Installation and Maintenance Manual
Install An Automatic Barrier Arm Gate Operator Only When:
The operator will be properly electrically grounded and the intended supply voltage matches
the voltage label on the operator.
The controls that operate the gate have been mounted far enough away from the moving
gate such that users cannot touch the gate while operating the controls. All easily
accessible controls must have a security feature to prevent unauthorized use.
The operator controls will be located in a clear line-of-sight to the gate. Radio controls and
other remote access controls must be connected only to the Remote Open input.
The required external entrapment sensors will also be installed. Be certain to carefully
review the instructions for placement, installation and adjustment of these external
entrapment sensors. If edge (contact) sensors are used, they are to be mounted on the
bottom edge, of the arm. If photo eyes or other non-contact sensors are used, they are to
be mounted in locations most likely to guard against entrapment. A combination of contact
and non-contact sensors may be used, but all must be recognized components under the
UL 325 standard. See pages 34 and 35 for details on the requirements.
If the Entrapment protection is provided by a continuous pressure actuation control, a
placard stating “WARNING” – “Moving Gate has the Potential of Inflicting Injury or Death Do Not Start Gate Unless Path is Clear.” Additionally, no other activation device shall be
connected and an automatic closing device of any kind shall not be used.
The automatic operator is labeled as appropriate for both the type and UL usage class of
the gate.
Class I: Intended to serve single to four family residential uses
Class II: Multi-family use, or any application intended to serve the general public
Class III: Commercial applications not intended to serve the general public
Class IV: Highest security. Security personnel prevent unauthorized access
The barrier arm must not be installed in a manner that will move toward a rigid object closer
than two feet.
4
Installation and Maintenance Manual
Important Information for Gate System Owners & Users
WARNING: To reduce the risk of serious injury or death, read and follow all instructions in the
gate operator handbook and on the warning labels.
Save These Important Owner and User Instructions:
(Installers – be certain to instruct the owners and users about the following items)
Automatic gates are for vehicular use only! Provide walkways and signs to direct
pedestrians and bicycles to a separate walk-through entrance. Because an automatic
gate can start at any time without warning, ALWAYS KEEP PEOPLE AWAY FROM
THE AREA OF THE GATE. The Warning labels that have been supplied with this
operator must remain installed, in manner clearly visible, on both sides of the gate.
Never allow children to use or play with controls that operate the gate. Keep all
remote controls, especially radio transmitters, away from children.
Teach all users how to turn off the electric power and how to release and move the
gate manually. Use the manual release only when the gate is not moving.
KEEP AUTOMATIC GATES PROPERLY MAINTAINED. Have a professional gate
installer perform routine tests of the entrapment protection sensors, such as photo
eyes and gate edges.
Typical System Schematic for a Barrier Gate
The following is a sample plan that incorporates the common elements of a typical bi-directional automatic
barrier arm gate.
1. A Photo eye helps to protect pedestrians that may stray into the path of the barrier arm.
2. An in ground vehicle sensing loop (reset function) to control closure, so that arm closes immediately when
a vehicle clears the barrier arm path.
3. An in ground vehicle sensing loop (free exit) activates the gate to open automatically from the inside.
4. Edge sensor to re-open the arm if an obstruction is encountered.
5. Gate entry device (card reader, telephone entry, keypad, etc) opens the gate after proper input from vehicle
driver.
5
Installation and Maintenance Manual
Tools Required for an Efficient Installation
1. Chalkline or other
builders string
6. Screwdriver sets,
Straight and Phillips
2. Carpenters
pencil or crayon
3. Concrete anchor
bolts, four
7. Wrench set, open end,
1/4" through 1"
1/2" x 4"
4. Allen wrench set
8. Electric drill and bits,
1/8" through 3/8"
5. Hammer
9. Roto-hammer and bits,
3/8" & 1/2"
10. Level—it doesn’t need to look
like this one, but the installation
needs to be level!
6
11. Two pair wide jaw vice
grip pliers, or two C clamps,
4" capacity
Installation Preparation Checklist
1. Read all of the instructions, especially the
Important Information in Section 1 at the
beginning of this manual, before you attempt
installation. This section is focused upon
mechanical installation. For electrical setup,
refer to Section 3, on system configuration
and use of the Smart Touch Controller.
2. Pour a concrete mounting slab that is a
minimum of 20” x 20” x 20” with the electrical
conduits located correctly to enter the
chassis. Keep in mind that a space of 7 X 11”
just inside of the operator door is where the
conduits must enter into the operator.
HySecurity recommends a slab reaches
below the local frost line. See the footprint
plan and elevation view on pages 13-15.
1. Drill four holes for concrete anchors
The operator must be mounted with four anchor bolts.
These will be 12.5” on center with a square pattern to
match the chassis base. Line up the operator so that the
end of the barrier arm is in the intended position. Place
the operator over the conduit and mark the mounting
holes. Once marked, remove the operator and drill for
½” min. anchor bolts.
2. Line up the operator
Set the operator over the mounting bolts, align the
operator and securely tighten the bolts.
3. Special two part operators
DC powered operators come with a separate power
enclosure. This enclosure should be mounted
within 20 feet of the operator. We recommend wall
mounting or using two 4” posts, with horizontal
mounting strut to create a support for this
enclosure. See also step 6 and section 8 on two
part operators.
Installation and Maintenance Manual
Installation
7
Installation and Maintenance Manual
Installation
4. Electrical power Connection
This operator is intended for permanent
installation, so all electrical conduits must be
properly connected to the control box. The
entry for the primary power is a ½ - ¾” knockout
on the left side of our control box next to the onoff switch. This operator was built to run on a
specific voltage and phase for line power. Make
sure the available line voltage and phase
matches the nameplate on this machine. Also
be certain that the wire size of the branch circuit
vs. the distance of the run from the main panel
is large enough to avoid excess voltage drop. At
a minimum, a 20 amp circuit (protected with a
20 Amp Inverse Time Breaker) should be
provided. Also be sure the operator is
electrically well grounded per NEC Article 250
and local codes. See the Appendix section for correct wire sizes and detailed electrical wiring
information.
5. Primary tap of Control Transformer (not on DC battery powered operators)
Check to make sure that the primary tap on the control transformer matches the line voltage you
have connected to the operator. Measure the line voltage carefully to distinguish between 208V
and 230V branch circuits. A label on top of the transformer identifies the various taps.
6. Power Connection for Two Part Battery Operators
The primary AC power must be routed to the DC power supply enclosure, but there must
conduits between the gate operator and the DC supply enclosure. Note: AC power is not needed
in the gate operator enclosure, unless there is an optional heater. Three separate DC circuits are
required between the battery supply and the gate operator. Heavy gage wires to supply the
motor and two 14-gage circuits for the controls. The heavy gauge wire must be at least 6-gauge
if the DC supply is within 20 feet of the operator, but must be increased to 2-gauge if the DC
supply is located farther from the operator. For full details, review the section titled “Two Part
Operators”.
7. Replace the Vent Plug!
Remove the ½” steel or plastic shipping plug on the pump manifold (left rear corner) and replace it
with the supplied black breather cap.
8. Configuring the Smart Touch Controller
The operator controls will not allow the gate to function until the Smart Touch Controller has been
configured. Wait to connect the external controls until you have reviewed the Smart Touch
Controller instructions, and tested the basic functions of the operator. Review the Smart Touch
Setup section.
8
Installation and Maintenance Manual
Installation
Attaching Barrier Arms To The Operator
1. Bolt arm(s) to operator. The maximum length for a single wood board is 14' length. Wood arms that
are longer than 14' must be twin arms bolted together near the tip.
2. Counterweights must be used for all arms over 18' in length, to assure proper performance. Verify
proper balance by following step #2 on the HTG 320 adjustments page.
3. Tubular aluminum arms may be single side mounted up to 18’ in length. All arms over 18’ must be
mounted into a center yoke adapter. Arms longer than 24’ are aluminum/fiberglass and include
cables to make the arm more rigid, see the arm drawings for their proper location and installation.
Basic Testing
Test the operator for smooth control of the barrier arm. The arm should stop smoothly at each end of
travel. If any adjustments are necessary, carefully review the HTG 320 adjustments page. Do not leave
the job site without correcting an operator that is stopping abruptly on its limits or damage to the
mechanical drive components may occur.
If your operator is equipped with vehicle detectors, be certain that they are either unplugged or
connected to a loop so that they do not cause interference with the function of the machine. If the motor
turns, but nothing moves, reverse two poles of a three-phase power source, and/or verify that the bypass
valve is closed. To check the bypass valve, verify that the round black knob near the hydraulic hose
connection point on the pump is not toggled to the bypass position. See drawing HTC35 ST on page 10.
Install Accessory Items
1. After all basic functions are verified, and adjustments made, connect any accessory or external
control wiring.
2. Vehicle detectors: If vehicle detectors are to be used, review the section pertaining to detector
loop sizing and layout.
3. Button station operation: Install the push button control within sight of the gate arm. Be certain the
opening is clear before closing gate. Mount a sign, which advises that the area be clear before
operation, adjacent to button station.
4. Protection: Mount a photo eye below the arm and/or an edge sensor to the leading edge of gate
according to its manufacturers specifications.
Install Warning Signs And Safety Information Labels
1. Be sure to install all of the warning signs or labels that were supplied with this operator. If
these labels have been misplaced or lost, call your local distributor or the factory for
replacements.
9
Installation and Maintenance Manual
Components of the Barrier Arm Gate Operator
10
Installation and Maintenance Manual
HTG 320 Adjustments
The HTG 320 gate operator is pre-adjusted at the factory to perform correctly with the barrier arm
shipped. If the arm length, or weight is changed, it may be necessary to re-adjust the gate operator to
perform correctly. To properly adjust the HTG 320 gate operator, perform all adjustments in the
sequence listed. Be certain to disconnect the power before performing any adjustments!
1. Arm Leveling: This adjustment is accomplished with the threaded anchor at the base of the
hydraulic cylinder (see drawing HTC35 ST on page 10). The cylinder must be fully extended when the
arm is exactly level. By hand, physically pull the arm downward, until the maximum cylinder travel is
reached. If the anchor is set too low, the cylinder will run out of travel before the arm is fully level. If the
anchor is set too high, the arm will appear to sag since the cylinder is intended to act as an internal
physical stop. If adjustment is necessary, disconnect the cylinder from the anchor, by loosening the
Allen set screws on the lower clevis, then removing the lower clevis pin. Loosen the 1" lock nut and
screw the anchor as required. Adjust upward to lower arm, or down to raise the arm. Be certain to
firmly re-tighten set screws and the 1” locking nut.
2. Balance: Before adjustments can be performed correctly, the operating weight of the arm must be
verified to be within the proper range for this machine. NOTE: All arms longer than 18' require
counterweight. If this is a new installation using a factory supplied arm, and no additional components
have been added, this test is not required because the factory has already provided the correct
counterweight for the arm as ordered. To determine the operating weight of the arm, first pull and twist
release the manual bypass valve (see drawing HTC35 ST on page 10), then manually lift the arm from
a position ten feet distant from the operator. The arm should appear to weigh forty pounds, or less,
regardless of the length or actual weight of the arm. If the operating weight of the arm is heavier than
our maximum specification, the operator is overloaded which adversely affects both automatic and
manual operation. The only remedy for an arm that is too heavy is to reduce the length of the arm, or
add additional counterweight.
3. Limit Switches: For the arm to stop smoothly, when opening or closing, the limit switches must trip
approximately ten degrees before the arm achieves full travel. If adjustments are necessary, use an
Allen wrench to adjust the cam collars on the drive shaft (see drawing HTC35 ST on page 10).
4. Brake Valves: When the limit switches are correctly set to trip a little early, the speed of the barrier
arm may decelerated to allow smooth stops. The rate of deceleration is adjusted by the red colored
brake valves, one for each direction of travel. The brake valve closest to the electric motor controls the
close direction (see drawing HTC35 ST on page 10). The brake valve on the left controls the open
direction. If adjustment of a brake valve is necessary, loosen the 9/16" lock nut and turn the adjuster
screw, in ¼ turn increments, with an Allen wrench. The adjustment works opposite of typical, such that
a counter-clockwise will stop the arm more rapidly. The correct brake valve adjustment will allow the
arm to smoothly stop just before the arm reaches full travel. Tighten the 9/16" lock nut on the brake
valve when complete.
Note 1: The brake valves do not control the closing of the arm when the manual bypass knob is pulled.
For adjustment of the manual mode, see step #3 on page 12.
Note 2: Careful adjustment of the open limit switch and brake valve may be especially important in
installations where there is truck traffic and the gate operator is close to the edge of the road. Be aware
that the later the open limit switch trips when the gate is opening, the sooner the open circuit will be
able to accept a safety reverse when the arm is closing. The best adjustment requires a rapid, but
smooth, stop of the arm at the end of the open cycle.
11
Installation and Maintenance Manual
HTG 320 Manual Operation
A bypass valve has been provided that can override the hydraulic lock that normally secures the arm
from being lifted. In the event of a power failure, manual operation is achieved through the following
procedure.
1. Find the manual bypass valve with the black round knob, which is located on the hydraulic pump
just above where the hoses connect. (See drawing HTC35 ST on page 10). Pull and twist the
valve to engage the manual mode. The barrier arm can now be manually lifted, beginning from
the tip, by moving “hand over hand” while walking towards the operator. When the arm is open,
be certain to close the bypass valve to prevent the arm from drifting down.
2. The arm can be manually closed with the same procedure, except that once manually started, the
arm will fully close itself due to the force of gravity.
3. To regulate the speed of closing, during manual operation only, there is a needle valve for flow
adjustment, which is located just above the manual bypass valve (see drawing HTC35 ST on
page 10). If adjustment is necessary, loosen the lock nut and turn the adjuster stem clockwise to
slow the rate of manual closure. The correct adjustment allows the arm to close at a moderate
speed and stop without excessive bouncing at the fully closed position.
12
46 ¾”
Installation and Maintenance Manual
13
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