Lower Cutting Deck
A three section gear pump is coupled to the piston (trac-
tion)pump.Thegearpumpsection farthestfromthepis-
ton pump supplies hydraulic flow to both the lift/lower
control valve and the steering control valve. Hydraulic
flow from this pump section is delivered to the circuits
through a proportional flow divider. This pump section
takes its suction from the hydraulic reservoir.
Thedropspeedofthecuttingdeckisregulatedbyanad-
justable flow control valve thatis located in the hydraulic
lines between thelift/lower control valve andthe deck lift
cylinders.
Tolower awing deck, the appropriate liftlever (right side
or left side) on the lift/lower control valve is pushed to al-
low valve shift in the lift/lower control valve. This valve
change causes a valve shift in the counterbalance man-
ifoldandoilflowtothepistonendoftheliftcylinder.High-
er hydraulic pressure against the piston end of the
cylinder causes the shaft to extend, and lowers the wing
deck. Oil from the rod end of the cylinder returns 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.
To lower the cutting deck, the center lift lever on the lift/
lower control valve is pushed to allow valve shift in the
lift/lowercontrol.Thisvalvechangeallowsapassagefor
oil flow from the rod end of the deck lift cylinders. The
weight of the cutting deck causes the lift cylinder shafts
to extend, and lowers the deck. Oil from the rod end of
the cylinders is allowed to return to the traction charge
circuit. When the lift lever is released, the lift cylinders,
and cutting deck, are held in position.
An adjustable counterbalance valve maintains back
pressure on the deck lift cylinders. A relief valve located
in the lift/lower control valve limits circuit pressure. Ex-
cess circuit flow is routed to the oil filter and then to the
traction charge circuit.
Groundsmaster 4100--D
Page 4 -- 11Rev. E
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 4100 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 |
(0 votes, average: 0 out of 5)