GM Series
TM19040 P.4/31
IMPORTANT NOTICE
1. Intended Use of Product
GM Series; Hydraulic Motor with Reduction Gears (hereafter referred to as GM) is a hydraulic driven
rotary actuator.
The product contains a reduction gears, a hydraulic motor, a brake valve and a parking
brake integrated into one compact unit.
It has been developed for use as an actuator for application
requiring low-rpm, high torque operation such as construction and marine machinery.
In addition, a winch specification is also available without a brake valve and with a mechanical brake of
external release pressure specification.
The following conditions are to be satisfied for the use of GM.
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GM should be used within the specification and the limitation specified by Nabtesco.
(Specifications and the limitation should be in compliance with those in confirmation notice (that is
equivalent to delivery specification sheet)
for GM or the specifications and operating agreement on
the machinery for which GM is used.)
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If it is used beyond the limitation range, it may cause abnormal wear due to poor lubrication or may cause
damage due to seizure.
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If GM is operated continuously at a high temperature, or at high load or high rotation continuously, the life or
performance decline and damage may occur.
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GM is not intended for the use in a series circuit, and problems related to the use in a series circuit are not our
responsibility.
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The product should be properly assembled in the customer equipment.
(Refer to p.14 in Chapter 4.)
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The proper lubrication condition should be maintained. (Refer to p.19 in Chapter 5.)
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The product should be installed in the environmental condition specified by Nabtesco. (Refer to
p.10 on 3.1. in Chapter 3.)
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Make sure GMs of the same type and model are used when applying them facing each other or
synchronizing.
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To prevent damages of GM and the machinery, do not use GM of other model or other manufacturer’s
product.
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The following precautions should be observed:
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When the end user is concerned with military or when the intended use is the manufacture of arms, the
product may be regarded as an object of export regulation according to the Foreign Exchange and Foreign
Trade Act in Japan. When exporting the product in this case, prepare review and necessary procedures.
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Prepare an oil tray to prevent the lubricant from leakage due to malfunction or deterioration.
2. Precautions for Safe Use of GM
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Be sure to read this manual before use of GM.
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NOTICE that this manual cannot cover all of the precautions related to safety. In transportation,
installation and maintenance of GM, ensure to observe general safety precautions.
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To prevent accidents, use the product only for the intended purpose. Avoid installation and
maintenance work not specified or recommended in this manual.
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Do not disassemble, repair, or modify the product, as it may cause malfunction or failure of the
product. If disassembly or repair is necessary, contact our customer support.(Refer to p. 31)
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Not only workers but also administrators should try to avoid any accidents.
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The installation and maintenance of the product should be performed only by personnel with at
least basic knowledge of the hydraulic motor and reduction gears and who have fully read and
understood this manual.
