Raise Cutting Deck
A three section gear pump is coupled to the piston (trac-
tion)pump.Thegearpumpsection farthestfromthepis-
ton pump supplies hydraulic flow to the lift/lower control
valve and the steering control valve. Hydraulic flow from
this pump section is delivered to the two circuits through
a proportional flow divider. The gear pump takes its suc-
tion from the hydraulic reservoir.
To raise a wing deck, the appropriate lift lever (right side
or left side) on the lift/lower control valve is pulled to al-
low valve shift in the lift/lower control. This valve change
allows hydraulic pressure to the piston end of the lift cyl-
inder and causes the shaft to retract, raising the wing
deck. Oil from the rod end of the cylinder flows to the
tractionchargecircuit.Whentheliftleverisreleased,the
lift cylinder, and wing deck, is held in position.
When the cutting deck is 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.
An adjustable counterbalance valve maintains back
pressure on the lift cylinders. Arelief valve located inthe
lift/lower control valve limits circuit pressure. Excess cir-
cuit flow is routed to the oil filter and then to the traction
charge circuit.
To raise the cutting deck, the center lift lever on the lift/
lower control valve is pulled to allow valve shift in the lift/
lower control. This valve change allows hydraulic
pressure totherodendofthe deck liftcylinders, causing
the cylinders to retract. As the cylinders retract, the cut-
ting deck raises. Oil from the piston end of the cylinders
returns to the hydraulic reservoir. When the lift lever is
released, the lift cylinders, and cutting deck, are held in
position.
Groundsmaster 4100--D
Page 4 -- 13 Rev. E
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 4100 D |
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| Document Type | Catalog |
| Language | English |
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
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