Chapter 5 Installation
39
• Attach the deep groove ball bearing to the
Step 4
center gear, and then mate the center gear with
the deep groove ball bearing and spur gear on
the reduction gear side.
• Confirm that the inner ring of the deep groove
ball bearing is correctly fitted into the
centering shaft of the center gear.
• Check that there is no foreign matter adhering
to the mating part (centering location), center
gear, and deep groove ball bearing.
If there is foreign matter adhering to the mating part (centering location), the mounting surface of the
reduction gear may be deformed, which could cause deterioration of performance, such as abnormal noise
and torque irregularity, and durability.
• Insert an O-ring (II) into the groove on the case
Step 5
for the reduction gear.
• If the product does not feature an O-ring groove,
seal the section using a liquid sealant, etc.
• If an O-ring cannot be used due to the structure,
seal the section using a liquid sealant, etc.
(Reference: “4.2.5 Liquid sealant”)
• When a liquid sealant is used, take extra care so
that it will not leak into the reduction gear.
• When a liquid sealant is used, take extra care so
that it will not leak into the case installation bolt
section.
• When a liquid sealant is used, follow the
instructions of the detailed coating method given
by the manufacturer of the sealant to be used.
When a liquid sealant is used, if the leaking liquid sealant enters the reduction gear, it could cause
deterioration of performance, such as abnormal noise, vibration, and torque irregularity. Also, if the
liquid sealant adheres to the lip of the oil seal, it could cause leakage of the lubricant.
When a liquid sealant is used, if it leaks into the case mounting bolt section, it could deteriorate the
bolt tightening force, and eventually result in deterioration of the transmission torque.
Note
Fig. 5-23
Reduction
gear
Deep groove
ball bearing
Center gear
Fig. 5-24
O-ring groove on
the case
Reduction
gear
O-ring (II)
Note
