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Units are shipped from the factory with the reducer half
of the input coupling installed.
1. Drive key into motor shaft. Slide the input coupling
half onto the motor shaft. Position the coupling half on
the motor shaft as shown in the preceding chart.
Tighten setscrews.
2. Insert the elastomer coupling element into the
reducer-side coupling half. Visually align the openings
in the coupling half with the ears on the motor side
coupling half. Slip the motor straight into the motor
adapter, insuring that the coupling engages properly.
Once the coupling engages, slide the motor tenon into
the motor adapter. Install and tighten four motor bolts.
WARNING: Keep fingers clear of mating flanges of
motor and reducer to prevent pinching injury.
3. Insure that there is no binding or excess clearance
between the coupling halves. The motor-side coupling
half may be loosened with a hex wrench inserted
through the adapter access hole; then use a
screwdriver to gently pry the motor coupling half
toward the reducer. The metal ears should not touch
the face of the opposite coupling hub and should have
no more than 1/32" clearance. Tighten setscrews
securely.
4. Install the plastic safety cap into the adapter access
hole.
IMPORTANT! While the basic MASTER ComboGear
reducer is suitable for any approved mounting
position, different oil levels are required for mounting
positions other than K1/L1/S1. You must add the
required amount of oil for the desired operating
position.
IMPORTANT: RIGID MOUNTING OF THE
REDUCER IS NOT RECOMMENDED.
System alignment problems indicate that rigid
mounting of a reducer in a rigid system may cause
"binding", leading to premature bearing, shaft or
reducer failure. A system must have some flexible
element that allows it to self-align during operation.
The ideal mounting for a hollow shaft reducer is to
use a torque arm design. If a reducer uses a
flange/bracket mounting concept, it is highly
recommended that the reducer be mounted on the
conveyor head shaft using the conveyor pillow
block on the opposite side of the conveyor as a
support bearing. A system with a rigidly mounted
bearing close to a rigidly mounted reducer will
probably be impossible to align and maintain.
TWIN TAPERED BUSHING INSTALLATION
WARNING: The output shaft bushings must be
shielded to prevent contact, which may result in injury.
Fabricate or contact MASTER for shields.
1. One bushing assembly is required to mount the
reducer onto the driven shaft. One assembly consists
of two tapered bushings, six bushing screws, bushing
keys and a shaft key.
2. The driven shaft must extend through the full length
of the reducer. The reducer should be mounted the
recommended minimum distance from the shaft
bearing (shown as dimension "A" in Fig. 2 and table.
Dimension "A" is required for bolt clearance/jackscrew
removal.)
3. Place one bushing on the shaft and position per
dimension "A". If the reducer is positioned closer to the
bearing than "A", place the screws (with lockwasher) in
the unthreaded holes in the bushing before positioning
the bushing on the shaft. Allow a minimum of 1/8"
between the screw heads and the bearing. Do not
grease the bushings.
4. Insert the output key in the shaft and bushing.
5. Place the reducer in position on the shaft aligning
the hub keyway with the shaft key.
6
INSTALLATION
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