Installation/Operation Precautions
• Always use (Metric) M8x16 bolts when mounting the rotor to the tower or roof tripod mounting
plate.
• Take care not to scratch the surface of the rotator or its mounting hardware. If the protective
coating is scratched, the underlying metal may be subject to corrosion or rusting.
• During operation, do not suddenly reverse the rotation during operation, as this places a large load
on the internal components of the rotor. Let the antenna come to a complete stop before reversing
the direction of rotation.
• Do not engage the rotor for more than three minutes of continuous rotation. While this rotor can
operate for up to five minutes continuously, operation must thereafter be halted, and the motor
must be allowed to cool for at least 15 minutes afterwards.
• This rotator is designed to provide centered rotation of a mast with an outside diameter* of
between 48 mm and 50 mm (1.89” to 1.97” O.D.). If it is necessary to use a mast of diameter less
than 48 ~ 50 mm, nearly centered rotation can be achieved using the optional “GL-33” mast
adjustment plate, per the illustrations below.
Mast Diameter f32 to f38: Use two plates.
Mast Diameter f39 to f47: Use one plate.
Mast Diameter f48 to f50: Do not use a plate.
• The use of a mast of outside diameter greater than 51 mm (2.01”) will result in off-center rotation.
The amount of offset increases with increasing mast diameter. A mast of 60 mm outside diameter
will result in rotation offset from the center by approximately 8 mm.
* Note that commonly-available steel “water pipe” is (A) usually specified in terms of inside
diameter, and (B) designed for holding in liquid under pressure; it is not particularly designed to
resist bending. Consult with your dealer or a professional tower/antenna installer for assistance
in procuring a mast of specifications adequate for your antenna system.
Center line
The rotation becomes off-centered for masts
with a diameter of less than f48.
Mast adjustment plate (Option)
Use two plates for mast diameters between f32 and f38.
Use one plate for mast diameters between f39 and f47.
Do not use a plate for mast diameters between f48 and f50.
Insert the mast adjustment plate(s) between the mast and the clamps on the rotor.
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