MacDon M155, Operator'S Manual

Page: 424 / 510

MAINTENANCE AND SERVICING
Adjusting Header Drop Rate
The header should lower gradually when the lower header switch is pressed. From fully raised to ground should
take approximately 3–4 seconds.
NOTE:
Drop rate should
NOT
be less than 3 to 4 seconds as structural damage may result.
NOTE:
If drop rate is too slow (over 30 seconds), return to cut height or tilt or fl oat presets will deactivate to prevent
overheating the hydraulic system.
DANGER
To avoid bodily injury or death from unexpected startup of the machine, always stop the engine and remove
the key from the ignition before leaving the operator’s seat for any reason.
1. Lower header to ground, stop the engine, and remove the key.
2. Open left cab-forward side platform, refer to
5.3.1 Opening Platforms (Standard Position), page 309
.
3. Loosen inner knob (B) on needle valve and then turn
outer knob (A):
• Clockwise to decrease the drop rate.
• Counterclockwise to increase the drop rate.
4. Tighten inner knob (A).
5. Check drop rate and readjust as required.
6. Close the platform, refer to
5.3.2 Closing Platforms
(Standard Position), page 310
.
Figure 5.196: Hydraulic System
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 as structural damage may result.
DANGER
To avoid bodily injury or death from unexpected startup of the machine, always stop the engine and remove
the key from the ignition before leaving the operator’s seat for any reason.
1. Lower header to ground, stop the engine, and remove the key.
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