MTD 500 series Shop Manual page 54

Medium Frame 2 & 3 Stage Snow Throwers
36. Measure the free travel of each Planetary Gear Set
using a feeler gauge.
NOTE: There should be 0.010" - 0.030" travel.
NOTE: If there is too much travel, add a 0.020"
shim, part number 936-0502. If there is not
enough travel remove a shim.
37. Remove the roll pin, but leave the sprocket on the
shaft.
NOTE: Installing the drive chain, with the roll pin in
place, is very difficult.
38. Install the Planetary Shaft Assembly by following
step 1 - 8 in reverse order.
39. Test run the unit in a safe area before returning it to
service.
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Figure 5.36