Toro 30413 Service Manual

Groundsmaster 4100--D/4110--DHydraulic System Page 4 -- 20
Mow Circuit Cutting Deck Blade Braking
WhentheoperatorturnsthePTOswitchOFForifadeck
is raised with the PTO switch ON, PTO manifold sole-
noidvalve(S)isde--energizedcausingbypasscartridge
(LC1) to shift (refer to information in Mow Circuit in this
section).Thisshiftedcartridgeallowsoilreturnoutman-
ifold port P2. At the same time, solenoid valve (S) in its
neutralpositionpreventsanysenselineflowthroughthe
spool which causes the brake cartridge (LC2) to shift to
its neutral position blocking return flow from the deck
motor and slowing the cutting blades (Fig. 11).
Theinertiaoftherotatingcuttingblades,however,effec-
tively turns the deck motor into a pump causing an in-
creasein pressure as the flowfromthemotorcomesup
against the closed brake cartridge (LC2). When this
pressurebuildstoapproximately600PSI(41bar),relief
valve (RV2) opens which allows a small amount of hy-
draulic flow to return to tank through a manifoldsensing
line(Fig. 12).This flow causes a pressure increasethat
shifts brake cartridge (LC2) to once again allow oil flow
from the motor (Fig. 13). When return pressure drops
below 600 PSI (41 bar), relief valve (RV2) reseats and
causesLC2toclose again blocking return flow from the
deckmotortofurtherslowthecuttingblades.Thisaction
ofthebrakereliefvalveopeningandthe brakecartridge
shifting occurs several times in a very short time frame
as the blades finally come to a stop. Once the blades
have stopped, brake cartridge LC2 remains in the neu-
tral position to keep the deck motor from rotating.
Figure 11
PTO
MANIFOLD
PUMP FLOW
RETURN
Figure 12
PTO
MANIFOLD
PUMP FLOW
RETURN
Figure 13
PTO
MANIFOLD
PUMP FLOW
RETURN

Toro 30413 Specifications

General

Brand	Toro
Model	30413
Category	Lawn Mower
Language	English