MacDon M100 SP Operators Manual - Manual (Page 159)

MAINTENANCE/SERVICE
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157
Rev. C
57.9.5.4 Header Drop Rate
The header should lower gradually when the
lower header switch is pressed. From full height
to ground should take approximately 3.5
seconds.
Adjust 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. Lower header to ground, stop engine, and
remove key.
b. Move maintenance platform rearward.
c. Loosen jam-nut (A) on needle valve and turn
screw (B) clockwise to decrease the drop rate
and counter-clockwise to increase the drop rate.
d. Tighten jam-nut (A).
e. Close platform and engine compartment hood.
f. Check drop rate and re-adjust as required.
B
A