MAINTENANCE AND SERVICE
Form 169469/169470/169471
186
Revision C
7.11.6 TRACTION DRIVE HYDRAULICS
7.11.6.1 Transmission Oil Pressure
The windrower transmission consists of two
variable displacement axial piston hydraulic
pumps, one for each drive wheel. The pumps
are driven through a gearbox from the engine.
Each pump requires charge flow to make up for
internal leakage, maintain positive pressure in
the main circuit, provide flow for cooling and
replace any leakage losses from external valving
or auxiliary systems. The charge pressure is
monitored and if it drops below 250 psi (1725
kPa), the CDM sounds a tone and displays a
flashing warning. Refer to Section 5.18.4 Cab
Display Module Warnings and Alarms.
IMPORTANT
Rated charge pressure must be
maintained under all conditions of
operation to prevent damage to the
transmission.
If the TRANS OIL PRESSURE warning is
displayed, shutdown the engine and proceed as
follows:
a. Check the hydraulic fluid level in the tank. Refer
to Section 7.11.1 Oil Level.
b. Check the hoses and lines for leakage.
c. Check the charge pressure relief valve. Refer to
following section.
d. If charge pressure still cannot be maintained, do
not operate the windrower. Contact your
windrower dealer.
7.11.6.2 Charge Pump Pressure
Incorrect charge pressure settings may result in
the inability to build required system pressure
and/or inadequate loop flushing flows. Correct
charge pressure must be maintained under all
conditions to maintain pump control
performance and to operate the brake release
Check charge pump pressure as follows:
DANGER
Stop engine and remove key from ignition
before leaving operator's seat for any
reason. A child
or even a pet could engage an
idling machine.
a. Open engine compartment hood fully.
b. Attach a 0 - 600 psi (4000 kPa) pressure gauge
to a hose that is long enough to allow pressure
gauge to be read from the operator's seat.
c. Clean test port fitting and attach hose to the
fitting.
d. Start engine and leave at idle. Pressure should
be 270 to 300 psi (1862 to 2068) kPa) with the
hydraulic oil at 100°F. (40°C) minimum.
e. If pressure is not within this range, see your
MacDon dealer or refer to the Technical Service
Manual.
Summary of Contents for M205 2010
Page 1: ...M205 Self Propelled Windrower OPERATOR S MANUAL Revision C Part 169469 25...
Page 51: ...OPERATOR S STATION Form 169469 169470 169471 49 Revision C continued next page...
Page 95: ...HEADER OPERATION D SERIES Form 169469 169470 169471 93 Revision C continued next page...
Page 181: ...MAINTENANCE SERVICE Form 169469 169470 169471 179 Revision C 7 10 13 3 Fuse Box Decal...