Toro Groundsmaster 300 Series Service Manual page 351

IMPORTANT: All six "U" shaped spacers must be on
rear square caster shafts – if one is left off,
remaining spacers will not stay in position during
operation. Always install spacers on caster shafts
with the spacer opening facing forward or to the
rear. Never install with the spacer facing the side or
middle of the deck (the arrow on the spacer should
be in the same direction as the pin).
NOTE: On front caster shafts, insert lynch pin in front
side of shaft with caster wheels in position as if deck
were traveling in forward direction. When inserted from
the front, the wire loop is less likely to be flipped up
during operation, causing the pin to fall out.
IMPORTANT: The thrust washer – not the spacers –
must contact bottom of front carrier frame tube.
Figure 8
1. Rear caster spacers 2. Hooked over plate
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Groundsmaster 300 Series Page 12 - 7 Adjustments