Toro Groundsmaster 4500-D Series Service Manual page 133

Cutting Deck Raise
Groundsmaster ® 4500-D/4700-D
19245SL Rev A
To raise the center five (5) cutting decks on the Groundsmaster 4700-D, the rear
of the center console switch is depressed. The switch acts as an input to the
TEC controller (T1) which then provides an electrical output to solenoid valves
S1 and S5 in the lift control manifold. The energized solenoid valves shift to allow
a passage for oil flow to the rod ends of the center five (5) deck lift cylinders. The
oil flow causes the lift cylinders to retract and raises the center five (5) cutting
decks. The orifice in lift manifold port C2 is bypassed during deck raising. The
junction manifold orifice leading to the #1 deck is bypassed during deck raising.
To raise a side cutting deck on the Groundsmaster 4700-D (deck #6 or #7), the
rear of the appropriate console arm lift switch is depressed. The switch acts as
an input to the TEC controller (T2) which then provides an electrical output to
the appropriate solenoid valves in the lift control manifold: S1 and S2 for deck
#6 and S1 and S7 for deck #7. The energized solenoid valves shift to allow a
passage for oil flow to the rod ends of the deck lift cylinder. The oil flow causes
the lift cylinder to retract and raises the cutting deck. An orifice in the lift manifold
restricts oil flow to the lift cylinder to control deck raising speed.
Page 5–31 Hydraulic System: Hydraulic Flow Diagrams