MacDon FD75 OM - Manual (Page 350)

MAINTENANCE AND SERVICING
6.11.3 Adjusting Side Draper Tension
Draper tension should be just enough to prevent slipping, and to keep the draper from sagging below the cutterbar.
WARNING
To avoid bodily injury or death from unexpected
start-up or fall of raised machine, stop engine,
remove key, and engage safety props before going
under machine for any reason.
To adjust the header draper tension, follow these steps:
1. Raise header, and shut down engine. Engage header
lift props.
2. Check that draper guide (rubber track on underside of
draper) is properly engaged in groove of drive roller (A)
and that idler roller (B) is between the guides.
Figure 6.165: Draper Guides
A - Drive Roller – One End B - Idler Roller – Both Ends
3. To tighten, turn bolt (A) clockwise. The white indicator
bar (B) will move inboard, indicating that draper is
tightening. Tighten until bar is about halfway in window.
4. To loosen, turn bolt (A) counterclockwise. The white
indicator bar (B) will move outboard, indicating that
draper is loosening. Loosen until bar is about halfway
in window.
IMPORTANT:
To avoid premature failure of draper, draper rollers
and/or tightener components, do NOT operate
with tension set so that white bar is not visible.
Also, to prevent draper from scooping dirt, ensure
draper is tight enough that it does not sag below
point where cutterbar contacts the ground.
5.
Figure 6.166: Tension Adjuster: Left Shown,
Right Opposite
169894 336 Revision A