General operation / installation – Grove Gear Helical-Inline Cast Iron (R Series) User Manual

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General Operation / Installation

General Operation

1. Run the motor which drives the reducer and check the

direction of reducer output rotation. Consult motor
nameplate for instructions to reverse the direction of

2. Attaching the load: On direct coupled installations,

check shaft and coupling alignment between speed
reducer and loading mechanism. On chain/sprocket
and belt/pulley installation, locate the sprocket or pulley
as close to the reducer as possible to minimize
overhung load. Check to verify that the overhung load
does not exceed specifications
published in the catalog.

Overhung loads subject shaft bearings

and shafts to stress which may cause premature
bearing failure and/or shaft breakage from bending
fatigue, if not sized properly.


High momentum loads: If coasting to a

stop is undesirable, a braking mechanism should be
provided to the speed reducer output or the driven
mechanism. The reducer should not be used as a

The system of connected rotating parts

must be free from critical speed, torsional or other type
vibration, no matter how induced. The responsibility
for this system analysis lies with the purchaser of the
speed reducer.









1. Mount the unit to a rigid flat surface using grade 5 or

higher fasteners. The mounting fasteners should
be the largest standard size that will fit in the base
mounting hole. Shim as required under flange or base
feet which do not lie flat against the mounting surface.

2. For shipment, pipe plugs are installed in the unit and a

vent plug is packed separately. After mounting the unit
in position, remove the appropriate pipe plug and
install the vent plug in the location shown on page 5.
On quad reduction units both the primary and the
secondary housings must be vented. Failure to vent
the unit can cause premature seal wear or loss of seal
and oil. These conditions are not covered by
warranty. Check for correct oil level. Contact the
factory for level and vent recommendations on
non-standard mounting positions.

3. Connect motor to speed reducer. Check to ensure that

the voltage range specified on the motor corresponds
to the supply voltage. Wiring instructions are normally
given on the motors, but if in doubt, reference should
be made to the particular manufacturer’s handbook.

If the mounting position is changed, the

oil quantity must be adjusted to obtain the proper oil
level per these Lubrication Instructions. Mounting
position must be one shown on page 5. Consult the
factory if you are not certain of the correct oil level or
quantity. Consult the factory for mounting positions
not shown.

Do not operate the reducer without

making sure it contains the correct amount of oil. Do
not overfill or underfill with oil, or injury to personnel,
reducer or other equipment may result.

A unit cannot be used as an integral part

of a machine superstructure which would impose
additional loads on the unit other than those imposed
by the torque being transmitted either through a shaft-
mounted arrangement, or any shaft mounted power
transmitting device. (e.g. sprockets, pulleys, couplings)

For safe operation and to maintain the

unit warranty, when changing a factory installed
fastener for any reason, it becomes the responsibility
of the person making the change to properly account
for fastener grade, thread engagement, load, tightening
torque and the means of torque retention.

When the gear units are used in

conjunction with any auxiliary equipment, care must
be taken to ensure proper alignment is achieved.

Use a flexible coupling with this gear

unit. Do not use a solid coupling. Any coupling, pulley,
gear wheel or sprocket fitted to the shaft of this unit
must be fitted by utilizing the tapped hole provided in
the final shaft. It must NOT be driven on as this may
cause internal damage to gears and bearings.

Helical InlineDrs,7-07 8/2/07 11:50 AM Page 3

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