MacDon A40-D, Operator'S Manual

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Revision A
Replacing Pointed Guards and Hold-Downs
Check daily that guards are firmly bolted to the cutterbar, and not worn or broken. Replace as required. A worn or
broken guard can be replaced without removing knife from cutterbar. This procedure describes the replacement of
pointed guards and hold-downs on single- and double-knife headers.
Pointed standard guard and hold-down
Follow this procedure to replace standard pointed guards and hold-downs on single- and double-knife headers,
except the double knife center guard and hold-down. Refer to
double knife pointed center guard and hold-down in
this section.
Figure 4.27: Pointed Guards
1. Stroke the knife so that knife sections are spaced
midway between the guards.
2. Remove two nuts (A) and carriage bolts (B) that attach
guard (C) and hold-down (D) to the cutterbar.
3. Remove guard (C) and hold-down (D).
4. Position new guard (C) on cutterbar, and install carriage
bolts (B).
5. Install hold-down (D), and secure with nuts (A). Tighten
nuts to 68 Nm (50 lbf·ft).
6. Check and adjust clearance between hold-down and
knife. Refer to
4.7.8 Hold-Downs, page 130 .
Figure 4.28: Pointed Guards
IMPORTANT:
The second, third, and fourth outboard guards (A) on
drive side of the header do
NOT have a ledger (B) as
shown for normal guard (C). Ensure that the proper
replacement is installed.
MAINTENANCE AND SERVICING