Checking Knife Hold-Downs - MacDon D65 Operator's Manual

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

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
169899
MAINTENANCE AND SERVICING
149.
Figure 6.44: Stub Guards
A - Nuts
C - Normal Top Guide
149
B - Center Guard
D - Adjuster Bar
Adjusting Knife Guards, page 145.
Revision A