Troubleshooting Drive System - Toro 500 EFI Service Manual

2. Secure a U-joint separator tool in a vise; then place
the yoke, joint, and bearing cup into position and
press the cup into the yoke.
Troubleshooting Drive
System
Problem: Power not transmitted from engine to wheels
Condition
1. Rear axle shaft serration worn - broken
Problem: Power not transmitted from engine to either front wheel
Condition
1. Secondary drive - driven gear teeth broken
2. Propeller shaft serration worn - broken
3. Coupling damaged
4. Coupling joint serration worn - damaged
5. Front drive - driven bevel gears broken - damaged
6. Front differential gears/pinions broken - damaged
7. Front drive actuator not operating
3. Install the retainer in the bearing cup; then remove
the yoke from the separator tool.

NOTE: Repeat steps 2-3 for the opposite-side bear-
ing cup.
4. Remove the separator tool from the vise and install
the universal joint, bearing cups, and movable yoke
into the fixed yoke using the same procedure as steps
2-3 except the vise cannot be used.
PR368
5. Check that the universal joint can be flexed freely
without binding; then apply multi-purpose grease to
the splines and install the driveshaft noting the match
marks made prior to removing.
PR374
Remedy
1. Replace shaft
Remedy
1. Replace gear(s)
2. Replace shaft
3. Replace coupling
4. Replace joint
5. Replace gear(s)
6. Replace gears - pinions
7. Replace fuse - drive select switch - front drive actuator
PR355
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