MacDon M105 Operator's Manual page 309

Adjusting Header Drop Rate
The header should lower gradually when the lower header switch is pressed. From full height to ground should take
approximately 3–4 seconds.
If drop rate is too slow, return to cut height or tilt or float presets may time out. This is to keep the hydraulics from
being pressurized.
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.
1. Lower header to ground, stop the engine, and remove
the key.
2. Move left cab-forward side platform rearward. Refer to
5.5.1 Opening Platform (Standard Position), page
3. Loosen setscrew (B) on valve (A).
4. Turn cap (C)
• Clockwise to decrease the drop rate
• Counterclockwise to increase the drop rate
5. Check drop rate and readjust 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
Adjusting Reel Drop Rate
The reel should lower gradually when the lower reel switch is pressed. From fully raised to fully lowered should
take approximately 3–4 seconds. Drop rate is a customer preference and will vary based on crop type and
cutting condition.
NOTE:
Drop speed should NOT be less than 3 to 4 seconds from all the way up to all the way down as structural
damage may result.
NOTE:
If drop rate is too slow, return to cut height or tilt or float presets may time out. This is to keep the hydraulics
from being pressurized.
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.
169890
MAINTENANCE AND SERVICING
205.
5.5.2 Closing Platform
206.
Figure 5.187: Hydraulic Valve Block
295
Revision A