Toro 03116SL Rev E Service Manual Groundsmaster 4100 D Preface Publication

Steering Circuit
A three section gear pump is coupled to the piston (trac-
tion)pump.Thegearpumpsection   farthestfromthepis-
ton pump supplies hydraulic flow to the steering control
valve and  the lift/lower control valve.  Pump hydraulic
flow is delivered to the two circuits through a proportion-
al flow divider. The gear pump takes its suction from the
hydraulic reservoir. Steering circuit pressure  is limited
by a relief valve located in the steering control valve.
ensures that the oil flow to the cylinder is proportional to
the amount of the turning on the steering  wheel. Fluid
leaving the cylinder flows back through the spool valve
then through the T port and to the hydraulic reservoir.
The steering wheel and steering control valve return to
the neutral position when turning is completed.
Right Turn
With the  steering  wheel in  the neutral  position (rear
wheels positioned straight ahead) and the engine run-
ning, flow enters the steering control valve at the P port
and goes through the steering control spool valve, by--
passing the  rotary  meter (V1)  and steering  cylinder.
Flow leaves the control valve through the PB port to the
oil filter and traction charge circuit.
When a right turn is made with the engine running, the
turningofthesteeringwheelpositionsthespoolvalveso
that flow goes through the bottom of the spool. Flow en-
tering the  steering control valve at  the P port  passes
through rotary meter (V1) is directed out port R.  Pres-
sure extends the piston for a right turn. The rotary meter
ensures that the oil flow to the cylinder is proportional to
the amount of the turning on the steering  wheel. Fluid
leaving the cylinder flows back through the spool valve
then through the T port and to the hydraulic reservoir.
Left Turn
When a left turn is  made with the engine running, the
turningofthesteeringwheelpositionsthespoolvalveso
thatflowgoesthroughthetopofthespool.Flowentering
the steering control valve at the P port passes through
therotary meter(V1) andis  directed outtheLport.Pres-
sure contracts the piston for a left turn. The rotary meter
The steering wheel and steering control valve return to
the neutral position when turning is completed.
STEERING CYLINDER
STEERING CYLINDER
PISTON MOVEMENT
STEERING CYLINDER
NO PISTON MOVEMENT
PISTON MOVEMENT
R
L
R
L
R
L
1
350
1350
PSI
1350
PSI
PSI
T
PB
P
T
PB
P
T
PB
P
STEERING
CONTROL
STEERING
CONTROL
STEERING
CONTROL
NEUTRAL POSITION
LEFT TURN
RIGHT TURN
Figure 12
Groundsmaster 4100--D
Page 4 -- 17
Hydraulic System
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 258 pages
Document TypeCatalog
LanguageEnglish
Product BrandToro. 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 TypePDF
Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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