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MAINTENANCE AND SERVICING
2. Open the left cab-forward side maintenance platform. Refer to
5.3.1 Opening Platforms (Standard Position),
page 309
.
3. Locate valve (A) installed at port D, it controls the reel
drop rate.
NOTE:
This valve is installed on draper ready windrowers
and only affects draper headers.
4. Loosen setscrew (B) then refer to the following options:
• Turn cap (C) clockwise to decrease the drop rate
• Turn cap (C) counterclockwise to increase the
drop rate
5. Check drop rate and adjust as required.
6. Tighten setscrew (B).
NOTE:
To reset to factory speci
fi
cations, fully close the
needle valve and open it four turns counterclockwise.
7. Close the platform, refer to
5.3.2 Closing Platforms
(Standard Position), page 310
.
Figure 5.197: Hydraulic System
Traction Drive Hydraulics
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
fl
ow in order to
• Make up for internal leakage
• Maintain positive pressure in the main circuit
• Provide
fl
ow for cooling
• Replace any leakage losses from external valving or auxiliary systems
The charge pressure is monitored. The cab display module (CDM) sounds a tone and displays a
fl
ashing warning if
charge pressure drops below 250 psi (1725 kPa). Refer to
Display Warnings and Alarms, page 86
.
Checking Transmission Oil Pressure
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, shut down engine, and proceed as follows:
1. Check the hydraulic
fl
uid level in the tank. Refer to
Checking and Filling Hydraulic Oil, page 401
.
2. Check the hoses and lines for leakage.
3. Check the charge pressure relief valve. Refer to
Checking Charge Pump Pressure, page 410
.
4. If charge pressure still cannot be maintained, do
NOT
operate the windrower. Contact your MacDon Dealer.
147649
409
Revision A
Содержание M155
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