TOHATSU BFT 250A, Service Manual

Page: 532 / 639

17-28
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GEAR CASE (COUNTER ROTATION)
INSTALLATION
Apply gear oil to the circumference of a new ball
bearing [1].
Place a wood block [2] under the reverse bevel gear [3].
Drive the ball bearing (55 x 100 x 21 mm) into the
reverse bevel gear using the special tool and a
hydraulic press as shown.
Soak the gear case [1] in the container [2] filled with oil
with the bearing installation side down.
Heat the oil to 80 °C – 90 °C (176 °F – 194 °F).
• Do not heat the oil above 90 °C (194 °F).
After the entire of bearing installation side of the gear
case becomes hot, remove the gear case from the
container and install the bevel gear shim [3] on the gear
case.
Install the reverse bevel gear/bearing [4] on the gear
case using the special tool as shown.
• Do not apply the force of 9,000 N (917 kgf, 2022 lbf)
or above during installation.
• The entire gear case becomes hot. Be sure to wear
the gloves during the operation.
• When the gear case, reverse bevel gear or bearing
is replaced with a new one, perform shim adjustment
and select the appropriate shim accordingly (page
17-34).
• Install the reverse bevel gear/bearing assembly
while the gear case is hot.
Apply marine grease to the nineteen needle bearing
rollers [1] and install them into the needle bearing outer
ring [2].
TOOLS:
Driver [4]
07749-0010000
Oil seal driver attachment,
72 mm [5] 07947-6340201
[2]
[5]
[3]
[1]
[4]
TOOLS:
Driver, 280 mm [5]
07949-3710001
Attachment, 62 x 68 mm [6] 07746-0010500
Pilot, 28 mm [7] 07JAD-PH80400
[2]
[1]
[3]
[4]
[7]
[6]
[5]
[1]
[1]
[2]