Toro 31236 Operator's Manual page 34

Note: To access the grease fittings for the rear-steering
linkage, remove the storage compartment.
Note: Raise the machine off the floor to allow better
grease migration through both the upper and lower king-pin
Note: The bearing life can be negatively affected by
improper washing procedures. Do not wash the machine
when it is still hot and avoid directing high-pressure or high
volume spray at the bearings or seals.
bushings. You should see grease purging out of both the top
and the bottom of the axle casting/bushing assembly areas
of all 4 kingpin assemblies.
Figure 31
34