Servicing Center Crankcase Components - Toro 500 EFI Service Manual

5. Remove the countershaft assembly (E) along with
the shift fork assembly.
6. Remove the crank balancer driven gear (G) and
account for a key; then remove the crankshaft bal-
ancer shaft.
7. Using Crankcase Separator/Crankshaft Remover
with the appropriate crankshaft protector, remove the
crankshaft.
CAUTION
Do not remove the remaining output shaft assembly
unless absolutely necessary. If the shaft is removed, the
shaft nut must be replaced with a new one and the shaft
must be re-shimmed.
8. Remove the secondary drive gear/secondary driven gear
retaining nut. From inside the crankcase using a rubber
mallet, drive out the output shaft assembly. Account for
the output shaft, a shim, a washer, and the nut.

To service crankshaft assembly, see Servicing Center
Crankcase Components sub-section.
Servicing Center
Crankcase Components
SECONDARY GEARS
FI662

NOTE: When checking and correcting secondary
gear backlash and tooth contact, the universal joint
must be secured to the front shaft or false measure-
ments will occur.
Checking Backlash

NOTE: The rear shaft and bevel gear must be
removed for this procedure. Also, always start with
the original shims on the rear shaft.
1. Place the left-side crankcase cover onto the left-side
crankcase half to prevent runout of the secondary
transmission output shaft.
2. Install the secondary driven output shaft assembly
onto the crankcase.
MD1024
3. Mount the indicator tip of the dial indicator on the
secondary driven bevel gear (centered on the gear
tooth).
4. While rocking the driven bevel gear back and forth,
note the maximum backlash reading on the gauge.
5. Acceptable backlash range is 0.05-0.33 mm (0.002-
0.013 in.).
Correcting Backlash

NOTE: If backlash measurement is within the
acceptable range, no correction is necessary.
1. If backlash measurement is less than specified,
remove an existing shim, measure it, and install a
new thinner shim.
MD1330
2. If backlash measurement is more than specified,
remove an existing shim, measure it, and install a
thicker shim.

NOTE: Continue to remove, measure, and install
until backlash measurement is within tolerance. Note
the following chart.
Backlash Measurement
Under 0.05 mm (0.002 in.)
At 0.05-0.33 mm
(0.002-0.013 in.)
Over 0.33 mm (0.013 in.)
AT THIS POINT
Shim Correction
Decrease Shim Thickness
No Correction Required
Increase Shim Thickness
69