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Yanmar 2GM - Bearing Adjustment

Yanmar 2GM
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TRANSMISSION-KM
SERIES
211
NOTE
The following procedure
for
adjusting the
input shaft bearings is similar to the proce-
dure
for
the KM2A,
KM2C
KM3A transmis-
sions, but only use the callouts in Figure 30
and Figure 31 that pertain to the input
shaft.
BEARING ADJUSTMENT
KM2A, KM2C
and
KM3A
KM2P
and
KM3P
1. Install the input shaft, intermediate shaft and output
shafts as described in the
Reassembly section.
2. Position the transmission case so the open end is up
and no pressure is being applied to the splined end
of
the
output shaft.
3. Install the outer bearing races on the input and output
shaft tapered bearings.
4. Measure the distance (A, Figure 30) in millimeters
from the mounting flange mating surface on the case to
the top
of
each bearing race. Record the measurements.
5. Measure the distance (B, Figure 31) from the mount-
ing flange mating surface to the bottom ofthe bearing race
bore for both the input and output shaft bearings.
6. Subtract the A measurement from the B measurement
for each shaft.
7. From the result obtained in Step 6, subtract 0.0-0.05
mm. This result equals the thickness
of
the shim(s) that
must be installed in the bearing bores in the mounting
flange.
8. Install the shim(s) in the bearing bores in the mounting
flange, then press the bearing outer races into the mount-
ing flange on top
of
the shims. Make sure the races are
bottomed.
Perform the following procedure
if
the following com-
ponents have been replaced: input shaft, input shaft bear-
ings, output shaft, thrust washers and output shaft
bearings. This procedure determines the thickness
of
shims that must be installed so the tapered roller bearings
properly contact the bearing outer races.
g. Apply sealer to the stop bolt threads, but not to the
threads at the end
of
the bolt (approximately 0.20
in.). Install the stop bolt into the shifter.
Input
shaft
B
Input shaft
Output
shaft

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