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Chapter 7 Reduction and Reversing Gear
_3._I_n_s.;;.p_e_c_ti_on_a_n_d_S_e_r_v_ic_i_n ... g ________________________
3,4JH3(B)(C)E
mm
Standard dimensions Limited dimensions
Dimensions 2
j
KM3A
29.2-29.8
28.1
NOTE : When dismantled, the forward or reverse direc-
tion of the drive cone must be clearly identified.
(4) If
the wear of the V-groove of the drive cone is exces-
sive, replace the part.
NOTE : When replacing the dive cone, the dnve cone and
forward large gear and reverse large gear must
be lapped prior to assembly.
The lapping procedure is descnbed below.
3-5-1 Lapping Procedure for Drive Cone
(1)
Coat the lapping powder onto the cave of the clutch
gear (Lapping powder : 67 micron silicon carbide
#280)
(2)
Set the large gear on the clutch shaft with a needle
bearing and then set the drive cone on the clutch
shaft
Printed in Japan
l!I~SHI-H8009
7-13
(3) Lap the large gear's cave and drive cone, pushing
them together by hand.
(4)
Push and
turn
the clutch gear about
5
times both
clockwise and counter-clockwise.
(5)
After lapping them, wash them with washing oil. The
lapped parts should be cleaned completely.
Large
NOTE: Do not mix the combination of the lapped parts.
The washing oil should be changed frequently in
order to prevent residual powder being left on the
parts.
When assembling the drive cone, be sure to
check its alignment. The larger chamferrng face
should be on the forward large gear side.
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