Traction Circuit
Thehydraulic pumpassembly isdrivenbyacoupling at-
tached to the engine flywheel. The pump assembly con-
sists of a three section gear pump, a gerotor charge
pump, and a variable displacement piston pump.
developed atthefixeddisplacement motors.Astheload
increases, pressure canincrease toamaximumof4000
PSI (276.0 bar). Main system pressure is limited by a
high pressure relief valve on each side of the closed
drive circuit. If pressure exceeds the relief setting, oil
flows through the relief valve to the low pressure side of
the closed drive circuit.
Pushing the top of the traction pedal engages a hydrau-
lic servo valve which controls the variable displacement
piston pump swash plate to create a flow of oil. This oil
is directed to two fixed displacement motors. Each mo-
tor powers a planetary drive assembly located behind
each of the front wheels. On 4WD units the hydraulic oil
continues ontoafixeddisplacementmotor andgearbox
assembly attached to the rear axle.
A gerotor charge pump provides a constant supply of oil
to the variable displacement pump and closed drive cir-
cuit for lubrication and to make up for oil that is lost due
to internal leakage in the pump and motors. Charge
pressure is limited to 250 PSI (17.2 bar) by a relief valve
(R5).
Operating pressure on the high pressure side of the
closed drive circuit is determined by the amount of load
Reelmaster 6500-D/6700-D
Page 4 - 15 Rev. C
Hydraulic System
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Reelmaster 6500-D, Toro Reelmaster 6700-D |
| Download File |
|
| Document Type | Service Manual |
| 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 |
| Product Type | Walk Behind Mower |
| Engine Manufacturer | Toro |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)