Checking And Adjusting Feed Draper Tension - MacDon FFT FD75 Assembly Instructions Manual

4.14 Checking and Adjusting Feed Draper Tension

Follow these steps to check and adjust feed draper tension.
DANGER
To avoid bodily injury or death from unexpected start-up or fall of a raised machine, always stop engine
and remove key before leaving the operator's seat, and always engage safety props before going under
the machine for any reason.
1. Raise the header fully, stop engine, and remove key from ignition.
2. Engage the header safety props.
3. Ensure draper guide (rubber track on the underside of draper) is engaged in groove of the drive roller and the
idler roller is between the guides.
Checking feed draper tension
NOTE:
The default position of spring retainer (A) is flush to the
edge of the spring box (B); however, the position of the
spring retainer varies with draper tracking adjustment at
the factory. Illustration shows transparent spring box to
show spring retainer position.
4. Check the position of spring retainer (A). If feed draper
tracks properly and spring retainers on both sides are
positioned within the following dimensions, than no
adjustment is necessary:
•
Loosened to 3 mm (1/8 in.) outside (C) the front
edge of spring box (B)
•
Tightened to 6 mm (1/4 in.) inside (D) the front edge
of the spring box (B)
5. If adjustment is necessary, proceed to Step
121.
Adjusting feed draper tension
6. To adjust feed draper tension, loosen jam nut (A) and
hold nut (B) with a wrench while turning bolt (C)
clockwise to increase draper tension or
counterclockwise to decrease draper tension.
IMPORTANT:
To avoid uneven draper tracking, adjust both sides
equally.
7. Tension draper until spring retainer (D) is within range
described in Step 4, page
8. Ensure draper is tracking properly after adjusting.
9. Tighten jam nut (A).
214325
PERFORMING PREDELIVERY CHECKS
6, page
121, and bolt (E) is free.
Figure 4.67: Feed Draper Tensioner (Spring Box
Drawn Transparent)
Figure 4.68: Tensioner
121
Revision A