MacDon D50, Operator'S Manual

Page: 163 / 298

169441
151
Revision D
1005336
A
B
C
D
Figure 4.62: Center Guards
8. Remove two nuts (A) and bolts attaching guard (B), hold-
down (C), and adjuster bar (D) to the cutterbar.
9. Remove guard (B), plastic wearplate (if installed), hold-
down (C), and adjuster bar (D).
10. Position the plastic wearplate (if applicable), replacement
guard (B), adjuster bar (D), and hold-down (C) onto the
cutterbar. Install bolts, but do
NOT tighten.
IMPORTANT:
Ensure center guard (B) (right of the cutterbar split) has
offset cutting surfaces.
IMPORTANT:
Hold-down (C) must accommodate the two overlapping
knives at the center guard location. Ensure the proper
replacement guard is installed at this location.
11. Check and adjust the clearance between the hold-down
and the knife. For instructions, refer to Checking and
Adjusting Knife Hold-Downs, page 151 .
Checking and Adjusting Knife Hold-Downs
Follow the provided procedures to properly check and adjust the knife hold-downs.
NOTE:
Align guards prior to checking and adjusting hold-downs. For instructions, refer to Adjusting Knife Guards, page 145 .
Perform daily inspections to ensure knife hold-downs are preventing knife sections from lifting off guards while permitting
knife to slide without binding.
Proceed to the applicable topic:
•
Checking Pointed Guard Hold-Downs, page 151
•
Checking Stub Guard Hold-Downs, page 152
Checking Pointed Guard Hold-Downs
This procedure is applicable to headers with pointed guards.
DANGER
To prevent bodily injury or death from the unexpected startup of the machine, always stop the engine and remove the
key before adjusting the machine.
Measure the clearance between the hold-downs and knife sections as follows:
1. Shut down the engine, and remove the key from the ignition.
2. Check the guard alignment and adjust it as required. Refer to Adjusting Knife Guards, page 145 .
MAINTENANCE AND SERVICING