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169441
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Revision D
1017936
A
B
C
D
E
Figure 4.121: Knifehead
10. Install knifehead pin (A) through the output arm and into
the knifehead. Tap knifehead pin (A) down, and make sure
the pin is seated at the bottom of the knifehead.
11. Using a feeler gauge, check that the gap at location (E) is
0.25 mm (0.01 in.).
12. Set groove (B) in the knifehead pin 1.5 mm (1/16 in.) above
output arm (C). Secure it with 5/8 in. x 3 in. hex head bolt
and nut (D), and torque the hardware to 217 Nm
(160 lbf ft).
1002943
A
Figure 4.122: Knifehead
13. Install grease fitting (A) into the knifehead pin, and turn the
grease fitting for easy access.
IMPORTANT:
Grease the knifehead just enough to start a slight
downward movement. Overgreasing will lead to knife
misalignment which causes the guards to overheat and the
drive systems to overload.
14. Torque the bolts to 271 Nm (200 lbf·ft).
15. Move the output arm to the midstroke position, and ensure
the knife bar doesn
’
t contact the front of the first guard. If
the knife drive box requires adjustment, contact your
MacDon Dealer.
16. Install and tension the knife drive belts. Refer to the following topics depending on your header:
•
For untimed belts, refer to
Tensioning Untimed Knife Drive Belts, page 157
•
For timed belts, refer to
Tensioning Timed Knife Drive Belts, page 160
•
For timed double-knife headers, also check the knife timing. For instructions, refer to
17. Close the endshield. For instructions, refer to
4.3.2 Closing Hinged Endshields, page 117
.
Changing Oil in Knife Drive Box
Change the knife drive box lubricant after the first 50 hours of operation and every 1000 hours (or 3 years) thereafter.
DANGER
To prevent bodily injury or death from the unexpected start-up or fall of a raised machine, always stop the engine and
remove the key from the ignition before making adjustments to the machine. NEVER climb onto or go underneath an
unsupported header.
1.
Raise the header to allow a suitably sized container to fit under the knife box drain and collect the oil.
2.
Shut down the engine, and remove the key from the ignition.
3.
Open the endshield. For instructions, refer to
4.3.1 Opening Hinged Endshield, page 116
.
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