3 TRANSMISSION
82410 • 82710 • 82910 WSM, 12271
(1
)-3 Oil Flow and Valves
Oil Filter Cartridge
t
Neutral Valve (Reverse)
Neutral Valve
(Forward)
~IIIIIIIIIIIII
Free Oil
Oil Tank
Hydraulic Pump
82410
[
16.6 Umin
J
4.4 U.S.gal/min.
3.7Imp.gal/min
82710,82910
[
24.4 Umin
J
6.4 U.S.gal/min.
5.4 Imp.gal/min
Hydraulic
--"=:::====::jControl
~====~
Valves
Cylinder Block
(Motor)
Oil Strainer
--r--
__
~~.llI
Oil Filter Cartridge
(for HST)
82410
Hydraulic Pump
[9.8
Umin
.]
2.6 U.S.gal/mrn.
2.2 Imp.gal/min.
82710,82910
[
11.7 Umin ]
2.9 U.S.gal/min.
2.6 Imp.gal/min.
~
High Pressure Oil
<:;:::==
Low Pressure Oil
12490F30040
OiICOOler~
The pump and motor are joined
in
a closed hydraulic
loop and most of oil circulates within the main oil circuit.
A little oil lubricates and oozes out from the clearance
between the moving parts of the case. Then oil
in
the
main oil circuit of the HST needs to be supplied a want.
So all of oil fed from charge pump flow to hydrostatic
transmission for charging and cooling.
The charge oil aids smooth operation of pistons for
pump and motor. The charge oil passes through the oil
cooler and oil filter cartridge to charge relief valve port.
The rest of oil passes through the charge relief valve into
the HST housing. And overflow oil from HST housing
return to the transmission case.
12271
M30020
3-M6
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