MacDon 742 HAY CONDITIONER - Manual (Page 65)

Form # 46290 Issue 09/05 63
MAINTENANCE/SERVICE
SICKLE AND SICKLE DRIVE (continued)
Sickle Hold-Downs
CAUTION: Always engage reel props
before working under reel.
Check daily that sickle hold-downs are set to
prevent sickle sections from lifting off guards but
still permit sickle to slide without binding. Set hold-
downs after guards are aligned.
To adjust hold-downs:
1. Using a feeler gauge between hold-down
and sickle section, turn bolt (A) to obtain
0.020 inch (0.5 mm) clearance.
2. After adjusting hold-downs, run header at a low
engine speed and listen for noise due to
insufficient clearance. Re-adjust as necessary.
Stub Guards and Top Guides
NOTE: For optimum performance, stub guard
top guides must be properly set. Check
clearances daily.
To adjust stub guard top guides:
1. Stroke sickle to center the sections on guard
points.
2. Using a feeler gauge at (V), back off adjusting
bolts (L) as required to obtain .010 to .015 inch
(.25 to .38 mm) clearance between top guide
and sickle section at each guard point.
3. Tighten guard bolts (R).
4. Use bolt (M) as required to tilt nose of top guide
up or down.
5. After adjusting all top guides, run header at a
low engine speed and listen for noise due to
insufficient clearance. Re-adjust as necessary.
SETTING SICKLE HOLD-DOWNS
ADJUSTING STUB GUARD TOP GUIDES