MacDon FD75 OM - Manual (Page 338)

MAINTENANCE AND SERVICING
CAUTION
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. Raise header fully, stop engine, and remove key. Engage header safety props.
2. Check that draper guide (rubber track on underside of draper) is properly engaged in groove of drive roller and
that idler roller is between the guides.
3. Loosen jam nut (A).
4. Hold nut (B) with a wrench and turn bolt (C)
clockwise to increase tension and counterclockwise to
decrease tension.
IMPORTANT:
Adjust both sides equal amounts.
5. Correct tension is when retainer (D) is flush with spring
holder, and bolt (E) is free.
NOTE:
Draper tension should be just enough to prevent
slipping, and keep draper from sagging below
cutterbar.
6. Tighten jam nut (A).
Figure 6.139: Tensioner
A - Jam Nut B - Nut C - Bolt
D - Retainer E - Bolt
6.9.3 Adapter Drive Roller
Removing Adapter Feed Draper Drive Roller
1. If header is attached to combine , detach header from the adapter. See 5.7.1 Detaching Header from Adapter
and Combine, page 230 .
2. Raise header fully, stop engine, and remove key. Engage header safety props.
3. Loosen jam nut (A).
4. Hold nut (B) with a wrench and turn bolt (C)
counterclockwise to decrease tension.
Repeat for
opposite side.
Figure 6.140: Tensioner
169894 324 Revision A