MacDon D65 Operator's Manual page 166

NOTE:
Never pry belt over pulley. Be sure drive motor is
fully forward.
1. Install V-belts (C) onto pulleys.
IMPORTANT:
To prolong belt and drive life, do NOT overtighten belt.
2. Turn adjuster bolt (B) to tighten belts. The belts should
deflect 5/32 in. (4 mm) with 12–17 lbf (52–77 N)
of force applied to each belt at mid-span when
properly tensioned.
3. Tighten the two bolts (A).
4. Close endshield. Refer to
36.
5. Check tension of new belts after a short run-in period
(about 5 hours).
Removing Timed Knife Drive Belt
This procedure is applicable to the knife drive on both left and right sides.
1. Open endshield. Refer to
35.
2. Loosen two nuts (A) on belt idler bracket to relieve
tension on belt.
3. Loosen nut (B) on idler pulley and slide idler down to
loosen belt.
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MAINTENANCE AND SERVICING
Closing Endshields, page
Opening Endshields, page
Figure 5.65: Knife Drive V-Belts
Figure 5.66: Knife Drive
152
Revision A