Mow
Hydraulic flow for themow circuit is supplied by twosec-
tions of the gear pump. The gear pump section closest
to the piston (traction) pump supplies hydraulic flow to
the side cutting units, while the next gear pump section
supplies the front cutting unit.
Returnoilfromthedeckmotorsisdirectedtotheoilcool-
er and oil filter. Deck motor case drain leakage returns
to the hydraulic reservoir.
Maximum mow circuit pressure is limited at each deck
by a relief valve (R1BY) in the hydraulic manifold. The
front and left deck relief valves are set at 3000 PSI and
the right deck relief valve is set at 2000 PSI.
Each cutting deck is controlled by a hydraulic manifold
equipped with a solenoid control valve (SV1), bypass
cartridge (BY1), brake cartridge (BR1) and relief car-
tridge (R1BR). When the the deck solenoid valve (SV1)
is not energized (PTO switch OFF), hydraulic flow by--
passes the deck motor through the bypass cartridge
(BY1). When the PTO switch is turned ON, the solenoid
valve (SV1) energizes, causing a shift of the by--pass
cartridge (BY1) and allowing hydraulic flow to the deck
motor. Brake cartridge (BR1) and relief cartridge
(R1BR) control the stopping rate of the blade when the
solenoid control valve is de--energized as the PTO
switch is turned OFF.
Circuit pressure can be measured at port (G) of the hy-
draulic manifold for each cutting deck.
Groundsmaster 4000--D
Page 4 -- 15
Hydraulic System (Rev. B)
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Groundsmaster 4000 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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