Chapter 5 Installation
23
Step 2
Insert the O-ring (I) into the groove on the case for the reduction gear.
(Reference: “4.2.5 O-rings”)
Some reduction gear may not have O-rings (I) groove, depending on the
ordered specifications. In such a case, prepare a groove on the
customer’s component, or seal the area with a liquid sealant indicated in
“4.2.6 Liquid sealant”.
When a liquid sealant is used, take extra care so that it will not leak into
the reduction gear. If it leaks 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.
When a liquid sealant is used, take extra care so that it will not leak into the case
installation bolt section. It could deteriorate the bolt tightening force, and could result in deterioration
of the transmission torque.
When a liquid sealant is used, follow the instructions of the detailed coating method given by the
manufacturer of the sealant to be used.
Step 3
Align the mounting holes of the motor mounting flange with the mounting holes of the reduction
gear (case section) and positions of the tapped holes for the case installation component, and then
attach the motor mounting flange to the reduction gear.
• Take extra care so that the O-ring is not caught by the mating section.
• Confirm that the centering location of the reduction gear (case section) is correctly fitted into the
mating hole of the motor mounting flange.
• Check that there is no foreign matter adhering to the mounting surface.
Fig. 5-3
Fig. 5-2
Reduction
gear
O-ring (I)
O-ring groove on
the case
Reduction
gear
M
at
in
g
se
ct
io
n
of
r
e
du
ct
io
n
ge
a
r
(sh
af
t si
de
)
Motor mounting flange
M
at
in
g
se
ct
io
n
of
m
ot
or
m
ou
nt
in
g
fla
ng
e
(
ho
le
si
de
)
Note
