Traction Drive Hydraulics - MacDon M105 Operator's Manual

1. Lower header to ground, stop the engine, and remove
the key.
2. Open the left cab-forward side maintenance platform.
Refer to
5.5.1 Opening Platform (Standard Position),
page 205.
3. Locate valve (A) installed at port D, it controls the reel
drop rate.
NOTE:
This valve is only installed with a draper header.
4. Loosen setscrew (B) and turn cap (C),
• Clockwise to decrease the drop rate
• Counterclockwise to increase the drop rate
5. Check drop rate and adjust as required
6. Tighten setscrew (B).
NOTE:
To reset to factory specifications, fully close the needle
valve and open it four turns counterclockwise.
7. Close the platform. Refer to
(Standard Position), page

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 flow in order to
• Make up for internal leakage
• Maintain positive pressure in the main circuit
• Provide flow 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 flashing warning
if charge pressure drops below 250 psi (1725 kPa). Refer to
page 67.
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 fluid level in the tank. Refer to
2. Check the hoses and lines for leakage.
3. Check the charge pressure relief valve. Refer to
4. If charge pressure still cannot be maintained, do NOT operate the windrower. Contact your MacDon Dealer.
169890
MAINTENANCE AND SERVICING
5.5.2 Closing Platform
206.
Checking Charge Pump Pressure, page
Figure 5.188: Hydraulic Valve Block
3.18.4 Cab Display Module (CDM) Warning/Alarms,
Checking and Filling Hydraulic Oil, page
296
288.
297.
Revision A