Yanmar 1GM User Manual page 209

TRANSM ISSION-KM SERIES
threaded holes in the flange and rotate the jackscrews to
force the flange off the transm ission case. Position the
transmission with the input shaft up, then remove the
flange from the transmission case .
9. Remove the output shaft (A, Fig ure 9) assembly from
the transmission case and set aside for disassembly.
10. The input shaft (B, Figure 9) and intermediate shaft
(C) assemblies must be removed together. Proceed as fol-
lows:
a. Insert a suitably sized bolt or rod through the hole in
the rear of the transmission that supports the inter-
mediate shaft (figure 10).
203
b. Carefully drive out the intermediate shaft while re-
moving the intermediate and input shaft assemblies
from the transmission case.
I !.
Using a large screwdriver, pry out the oil seal in the
transmission case. Be careful not to damage the case or
the adjacent bearing race .
12. Using a large screwdriver, pry out the oil seal in the
transmission mounting flange . Be careful not to damage
the case or the adjacent bearing race .
13.
If inspection indicates additional disassembly is
nec-
essary, refer to the following sections.
Insp ection
Input shaf t
I. Check the gear teeth for excessive wear, corrosion and
mechanica l damage. Check the teeth for galling, chips,
cracks, missing pieces, distortion or discoloration from
overheating. Replace the input shaft if the gears are dam-
aged.
2. Inspect the input shaft bearings (F fgure II) and seal
surfaces for excessive wear, grooves, metal transfer and
discoloration from overheating. Use a press 10 remove
damaged bearings and to install new bearings.
NOTE
Shims behind the outer bearing race in the
mountingflange determine bearing preload
for the input shaft hearings. Save the shims
and reinstall them
if
reusing the original
parts .
3. Inspect the input shaft beari ng outer races in the trans-
mission case (A, Figure 12) and mounting flange (A, rig-
ure 13). If either race is damaged or excessively worn,
remove it using a suitable puller.
10