Raise Cutting Deck
A four section gear pump is coupled to the piston (trac-
tion) pump. The third gear pump section supplies hy-
draulicflowtothelift/lowercontrolvalveandthesteering
control valve. Hydraulic flow from this pump section is
delivered to the two circuits through a proportional flow
divider. The gear pump takes its suction from the hy-
draulic reservoir.
To raise the front cutting deck, the center lift lever on the
lift/lower control valve is pulled to allow valve shift in the
lift/lower control valve. This valve change allows hy-
draulic pressure to the rod end of the front deck lift cylin-
ders, causing the cylinders to retract. As the cylinders
retract, the front deck raises. Oil from the piston end of
the cylinders returns to the hydraulic reservoir. When
theliftleverisreleased,theliftcylindersandcuttingdeck
are held in position.
When the cutting decks are in a stationary position, flow
from the gear pump is by--passed through the lift/lower
control valve, counterbalance manifold, oil filter and
traction charge circuit.
Anadjustablecounterbalancevalve(CB)inthecounter-
balance manifold maintains back pressure on the deck
lift cylinders to allow some of the cutting deck weight to
be transferred to the traction unit to improve traction. A
reliefvalve located inthelift/lowercontrolvalve limitslift/
lower circuit pressure to 1500 PSI (103 bar). Excess cir-
cuit flow is routed to the oil filter and then to the traction
charge circuit.
To raise a side cutting deck, the appropriate lift lever on
the lift/lower control valve is pulled to allow valve shift in
the lift/lower control valve. This valve change allows hy-
draulic pressure to the piston end of the lift cylinder and
causes the cylinder shaft to extend, raising the cutting
deck. Oil from the rod end of the cylinder flows to the
tractionchargecircuit.Whentheliftleverisreleased,the
lift cylinder and cutting deck are held in position.
Groundsmaster 4000--D
Page 4 -- 17
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30412, Toro Groundsmaster 4000 D |
| Download File |
|
| Document Type | Catalog |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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