MTD 700 Series Professional Shop Manual page 72

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700 Series Lawn Tractor
13. Lift the bevel gears out of the transaxle for disas-
sembly and (mostly) visual inspection.
See Figure 5.68.
13a. Note the placement of the shims on the bevel
gear shaft.
13b. Check the bevel gear teeth (that mesh with
the pinion gear) for wear or damage.
13c. Check the shift collar engagement teeth on
the bevel gears for wear or damage.
13d. Check the inside bearing surface of each
bevel gear for wear or damage.
13e. Check the bevel gear shaft for wear or dam-
age.
13f. Check the shift collar and fork for wear.
See Figure 5.69.
13g. Check shift collar teeth and splines for wear or
damage.
14. Check the interior of the transaxle housings.
14a. If there is heavy gear-tooth damage on the
ring gear of bevel gears, there is likely to be
large debris in the grease. Dispose of the
grease if the transaxle is to be rebuilt.
14b. If there is heavy wear on any of the contact
surfaces, there is likely to be small particles of
metal in the grease. Dispose of the grease if
the transaxle is to be rebuilt.
14c. If the grease is obviously contaminated with
water or other substances, dispose of the grease if the transaxle is to be rebuilt.
14d. If the transaxle is being warranted, leave the grease and debris in place, after the root cause of the fail-
ure is identified.
66
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Forward bevel gear
Engagement teeth
Figure 5.68
Shift fork
splines
Figure 5.69
Reverse bevel gear
Shift collar
Teeth