Chapter 5
Installation
23
Fig. 5-9
Area to apply liquid sealant
(3) When the reduction gear is shaped in a way its shaft side is not hermetically sealed
• Only for type F (Fig. 2-6), perform steps 1 to 3 by taking care regarding the following precautions.
For other types, proceed to “5.2.2 Installing the input gear”
Step 1
• When the shaft mounting surface of the reduction gear is provided with an O-ring groove, attach an
O-ring.
• If the product does not feature an O-ring groove, prepare a groove on the customer's component, or
seal the area with a liquid sealant. If an O-ring cannot be used due to the structure, seal the section
using a liquid sealant, etc.
(Reference: “4.2.4 O-ring”)
For the product with an O-ring groove, use
the O-rings indicated in the separately
provided “Outer dimensions” drawings and
specification sheet. If there is no indication,
select the size of the O-ring appropriate for
the surface to be sealed.
When sealing with a liquid sealant
• When sealing the section with a liquid sealant,
coat the liquid sealant onto the
area on the
shaft mounting surface. For the coating area, refer to
the illustration on the right.
• Apply coating seamlessly in the coating area.
• Take extra care so that the liquid sealant will not leak
into the reduction gear or mounting bolt section.
• For the detailed coating procedure, follow the
instructions given by the manufacturer of the sealant
to be used.
(Reference: “4.2.5 Liquid sealant”)
If a coating is not applied at some points within the coating range, it could cause leakage of the
lubricant.
If the leaking liquid sealant is mixed into 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.
If it leaks into the shaft mounting bolt section, it could deteriorate the bolt tightening force, and
eventually result in deterioration of the transmission torque.
Note
Note
Fig. 5-8
O-ring
Reduction gear
O-ring groove on the shaft
