Controlled Products Systems Group HTG 320-2 ST - Manual (Page 23)

StrongArm Installation and Reference 13
StrongArm (HTG 320) Adjustments
The StrongArm (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 StrongArm gate operator, perform all adjustments
in the sequence listed. Be certain to disconnect the power before performing any adjustments!
Arm Leveling: To adjust the gate arm with the threaded eyebolt at the base of the hydraulic cylinder
(see drawing HTC35 ST on page 12), take the following steps:
CAUTION: DO NOT remove the pin from the eyebolt. Neither the hydraulic cylinder nor the eye
bolt needs to be removed to adjust the gate arm height.
1. With the gate in the closed position, use a needle-nose pliers to remove the top and bottom
safety C-clips from the eye bolt.
2. Use a 1½-inch wrench to loosen the top nut to release tension on the eye bolt.
3. Move the gate arm and stabilize it at a level position.
4. To maintain the level position, hand-adjust the bottom nut up or down.
Note: You may initially need to unscrew the bottom nut to allow the gate arm to reach a level
position.
5. To lock the gate arm’s level position, tighten the top nut. Nut torque should be at least 100 ft-lbs
to prevent loosening during extended operation.
6. Re-insert the top and bottom safety C-clips so a gap (less than 1/8 inch) is
between the nut and C-clips.
7. Run a gate test by cycling the gate arm open and closed.
8. If the arm height needs further adjustment, repeat steps 1 through 7.
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 12), 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.
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 12).