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Assembling of gear head
Maintenance/ Inspections
Assembling of gear head
• Preparation for assembling
(1) Use the product in combination with only the compatible gear head. Failure to
observe this instruction will result in malfunction.
(2) Make sure that the O-ring is attached to the bottom of motor flange.
If the gear head is assembled with O-ring floating, it may result in grease leakage.
(3) When grease adheres to the end surface of gear head, thoroughly wipe it off.
If the gear head is assembled with grease adhered, it may exude.
• Assembling
(1) Direct the motor pinion upward, and make sure that the relation between direction of
motor lead wire and output shaft of gear head matches with the equipment.
(2) Do not contact a tooth tip of pinion shaft to a tooth tip of gear head.
Set each toothes of motor and gear head correctly and gently press and turn the gear
head in counter and counter-clockwise.
(3) To attach the gear head to an application, use the "attaching screws" supplied with
the gear head and tighten the screws with appropriate torque and with care not to
pinch the O-ring, so that the there is no gap between motor flange and gear flange.
The recommended torque is shown below.
Size
Gear head type
Screw size
Tightening
torque
Attachment
pitch
80 mm sq.
MX8G
M5
2.5 N
・
m
94 mm
90 mm sq.
MZ9G
M6
3.0 N
・
m
104 mm
MY9G
M6
3.0 N
・
m
—
<Note>
Do not forcedly assemble the motor and gear head. Do not damage the tooth of
the motor pinion and gear head. Incorrect assembly results in abnormal noise
generation or shortened unit life.
Faucet portion
end face
Output shaft
Faucet face
O-ring
Motor pinion
Leadwires
Flange face
Maintenance/ Inspections
Routine maintenance and inspection are essential for proper and satisfactory operation of
the motor.
Maintenance/ Inspection item
Maintenance/
Check item
Inspection
procedure
Condition
Input voltage
Voltmeter Must be within ±10% of rating.
Input current
Ammeter Must be within rated input current described on nameplate.
Insulation
resistance
Insulation
resistance
tester
The resistance of motor should be 1 MΩ or higher when tested
with a 500 V megger.
Measuring position:
Between power input line (L1, L2,L3) and grounding wire
Brushless motor:
Across phase (U, V, W) and ground terminals
Noise
Hearing
Noise level must not be different from the usual level. In addition,
abnormal noise such as rumbling noise must not be heard.
Vibration
By hand
Free from abnormal vibration.
Grease
leakage
Visual check
Check that circumference of the motor and gear head are free
from oil and grease.
If grease leakage will cause problem, use grease sealing cover.
Installation
bolt
Torque
wrench
Check for loosening of bolt, and tighten additionally as
necessary.
Use
environment
By sight
Check the ambient temperature and humidity, and make sure
that dirt, dust, or foreign substance is not found.
Caution
• Power-on/off operations should be done by the operators themselves for ensuring safety
in checking.
• Do not touch the motor while it is running or immediately after it stops because it gets hot
and stays hot for a while after power has been turned off.
• When testing the insulation resistance of the brushless amplifier with the megger, discon-
nect the amplifier from all associated devices. Performing megger testing without first
disconnecting these devices will cause failure.
• Do not use benzine, thinner, alcohol, acidic or alkaline detergent, as it may cause discol-
oration or breakage of the outer case.
When disassembly, troubleshooting, etc., is needed,
be sure to contact our service department or the sales agent of purchase.
