Yanmar 1GM10, Shop Manual

Page: 210 / 240

204 CHAPTER TEN
Intermediate shaft
1. Remove and discard the O-ring (Figure 14) at the end
of the shaft.
2. Remove the thrust washer, gear and roller bearings.
3. Inspect the bearings, shaft and reverse idler gear inside
diameter for excessive wear, grooves, metal transfer and
discoloration from overheating. If necessary, replace the
shaft, gear and bearings.
4. Check the idler gear teeth for excessive wear, corro-
sion or rust and mechanical damage. Check the teeth for
galling, chips, cracks, missing pieces, distortion or discol-
oration from overheating. If necessary, replace the gear.
5.
Reassemble the intermediate Install a new
O-ring on the shaft.
Output shaft
Refer to Figure 15.
1. Using a suitable puller (Figure remove the bear-
ing, spacer and reverse gear from the output shaft.
2. The retaining nut at the end of the shaft is staked. Use a
chisel to cut away the staked portion so the nut will rotate.
To hold the output shaft, position the coupling flange in a
vise, then set the output shaft into the splines in the flange
as shown in Figure
17.
NOTE
The retaining nut has left-hand threads.
3.
Unscrew the retaining nut by rotating the nut clock-
wise (left-hand threads).
4. Using a suitable puller, pull the bearing, spacer and
forward gear off the output shaft.
5. Remove the pin from the shaft.
NOTE
Mark the clutch cone in Step 6 according to
or reverse end so it can be rein-
stalled in its original position.
6. While holding the clutch cone, tap the end of the shaft
with a soft-faced hammer to remove the inner roller bear-
ing race, spacer and cone clutch. A suitable puller or press
may also be used. Remove the remaining inner bearing
race and spacer.
7. Check the forward and reverse gear teeth for excessive
wear, corrosion and mechanical damage. Check the teeth
for galling, chips, cracks, missing pieces, distortion or dis-
coloration from overheating. If necessary, replace the
gears.
Intermediate
shaft
/
Reverse
idler aear
Roller
bearings
O-ring
8. Inspect the forward and reverse gear inside diameters
for excessive wear, grooves, metal transfer and discolor-
ation from overheating. If necessary, replace the gears.
9.
Install the cone clutch on the output shaft and check
movement of the clutch on the output shaft. If the clutch
does not move smoothly, inspect the splines on the clutch
and shaft for burrs, scoring, galling or other signs of dam-
age. If dressing will not correct the damaged splines, re-
place the clutch
shaft.
10. Inspect the tapered surface of the forward and reverse
gears for galling, scoring or other damage that will pre-
vent smooth cone clutch engagement. If necessary, re-
place the gears.
11. Install the cone clutch into the forward and reverse
gears. Measure clutch depth as shown in Figure 18. Com-
pare the measurement with the specification in Table 3.
Replace the part, in necessary.
12. Measure the width of the shifter groove in the cone
clutch (Figure 19) and compare with the specification in
Table
4.
13. Inspect the roller bearings and inner bearing races for
excessive wear, grooves, metal transfer and discoloration
from overheating. If necessary, replace the bearings and
inner races.
14. Measure the wear surface of the thrust washers. If
wear exceeds 0.20 mm (0.008 in.) on the thin thrust
washer, replace the washer. If wear exceeds 0.05 mm
(0.002 in.) on the thick thrust washer, replace the washer.
15. On
and transmissions-Measure the
width of the spring cups and compare them with the speci-
fications in Table
5.
16. On and transmissions-Measure the
width of the spring cup retainers and compare them with
the specifications in Table
5. If any surface wear on the
retainer exceeds 0.10 mm (0.004 in.), replace the retainer.
17. Assemble the output shaft by reversing the disassem-
bly procedure while noting the following: