Mow And Backlap - Toro Greensmaster 3200 Service Manual

Mow and Backlap

Mow
The gear pump (P1) is directly coupled to the the hydros-
tat which is driven directly by the engine. Taking its suc-
tion directly from the hydraulic reservoir, the gear pump
supplies oil flow to the manifold block and to the reel mo-
tors.
With the engine running and the Functional Control and
Raise/Lower/Mow levers positioned so the reels will
not turn (see Operator's Manual), solenoid valve (S1) is
de–energized. S1 by–passes flow from the reel motors
directly to the hydraulic reservoir.
When the engine running and the Functional Control
and Raise/Lower/Mow levers positioned so the reels
will turn (see Operator's Manual), solenoid valve (S1)
is energized. Flow is diverted to the reel motors.
On units with the optional backlap kit installed, flow
through the manifold block is different. Oil flow from port
(P1) flows through the 11 position reel speed control
valve (FC1). Flow across the speed control valve is
Hydraulic System
pressure compensated by the logic cartridge valve
(LC1). The logic cartridge valve maintains a pressure
differential of 75 PSI (5.2 bar) across the speed control
valve. Any excess flow above what the speed control
valve is set for is by–passed to the reservoir through the
logic cartridge valve. With the backlap valve (RD1) in the
mow position, oil flows through the valve, out port (MA),
and reel motors that are connected in series.
Oil flows through the left (M2), right (M3), and then rear
reel motor (M1) as it turns the motors in the mow direc-
tion. The oil then returns through the manifold block to
the reservoir.
Backlap
Backlapping operation is the same as mowing opera-
tion, except for the position of the backlap valve (RD1).
The backlap valve is in the backlap position allowing oil
flow through the rear (M1), right (M3), and then left (M2)
reel motor as it turns the motors in the backlap direction.
Page 5 – 12 Rev. A Greensmaster 3200/3200–D