MacDon D65 SP DHOM - Manual (Page 161)

MAINTENANCE AND SERVICING
1. Remove the two nuts (A) and bolts that attach guard (B)
and top guide (C) and adjuster bar (D) to cutterbar.
2. Remove guard, poly wear plate (if installed), top
guide (C), and adjuster bar (D).
3. Locate poly wear plate (if applicable), replacement
guard (B), adjuster bar (D), top guide (C), and install
bolts, but do NOT tighten.
IMPORTANT:
Ensure center guard (B) has offset cutting surfaces.
The top guide (C), which is an inverted normal stub
guard, must accommodate the two overlapping knives
at center guard location on double-knife header. Ensure
replacements are correct part.
4. Check and adjust clearance between hold-down and
knife. Refer to
Checking Knife Hold-Downs, page 149 .
Figure 6.44: Stub Guards
A - Nuts B - Center Guard
C - Normal Top Guide D - Adjuster Bar
Checking Knife Hold-Downs
Check daily that knife hold-downs are set to prevent knife sections from lifting off guards, but still permit knife to slide
without binding. If there is obvious evidence that the hold-downs are not properly adjusted, check the clearance
between the hold down and knife section with a feeler gauge.
Refer to:
• Adjusting Hold-Downs with Pointed Guards, page 150
• Adjusting Hold-Downs with Stub Guards, page 151
NOTE:
Guards should be aligned prior to adjusting hold-downs. Refer to
Adjusting Knife Guards, page 145 .
169899 149 Revision A