Toro Groundsmaster 4500-D Operator's Manual page 31

Transporting (Groundsmaster 4700–D
Only)
Use the two rear transport latches for the outer cutting units
when transporting over long distances, rough terrain, or when
trailering.
After Operating
To ensure optimum performance, clean the underside of the
mower housings after each use. If residue is allowed to build
up in the mower housing, cutting performance will decline.
Note: Lower cutting units to the ground whenever machine
is parked. This relieves the hydraulic load from the system,
prevents wear on system parts and also prevents accidental
lowering of the cutting units.
31