Adjusting belt tracking, Caution – MacDon D65 SP DHOM User Manual
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12. Re-tension the right side drive belt as per above,
ensuring that the drive pulleys do not rotate.
IMPORTANT:
Do NOT use the adjuster bolt at the drive pulley to adjust
timing belt tension.
13. Recheck the timing.
14. Close both endshields. Refer to
.
Adjusting Belt Tracking
The following procedure is applicable to the left side knife drive and the right side knife drive on timed drive headers.
IMPORTANT:
A belt that is not tracking properly is subject to premature failure. Ensure the pulleys are aligned and parallel.
Follow the belt tensioning procedures in this manual to avoid misalignment.
The cogged timing belt should be centered on the knife drive box pulley and at least 0.08 in. (2 mm) from either
edge when the header is running. The belt should also avoid constant contact with the flanges on the drive pulley
but occasional contact is acceptable. A gap should be visible between the belt and the pulley flanges.
To correct tracking problems, proceed as follows:
1.
Open the endshields.
CAUTION
Exercise extreme care when operating the header
with the endshields open.
2.
Operate the header and observe how the belt is
tracking on both the drive pulley and the knife drive
box pulley on both sides of the header. Shut down
the windrower and remove key from ignition before
making any adjustments.
3.
If the belt is tracking toward the inboard side of the
drive pulley, the likely cause is a toe-out problem (belt
tends to move toward the low tension side of the pulley
[inboard]). Proceed to Step
to correct the problem.
4.
If the belt is tracking toward the outboard side of the
drive pulley, the likely cause is a toe-in problem (belt
tends to move toward the low tension side of the
pulley [outboard]). Proceed to Step
to correct the problem.
Figure 6.95: Knife Drive Pulley
A - Toe-Out: Left Side
B - Toe-Out: Right Side
C - Toe-In: Left Side
D - Toe-In: Right Side
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