MacDon A40D - Knife Drive Box; Checking Mounting Bolts

262334 159 Revision A
4.8.9 Knife Drive Box
The knife drive box converts rotational motion from the windrower header driveshaft to reciprocating motion for the knife.
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A
B
Figure 4.48: Knife Drive Box
Heavy-duty oil bath knife drive box (A) uses tapered roller
bearings on the input shaft and the yoke for increased
durability. The pulley and drive arm connections are straight
splines with clamping bolts.
Check the oil level in knife drive box (A) with the dipstick that is
incorporated into breather (B).
Checking Mounting Bolts
The mounting bolts must be checked occasionally to maintain the performance of the header.
DANGER
To avoid bodily injury or death from the unexpected startup of the machine, always stop the engine and remove the
key from the ignition before leaving the operator’s seat for any reason.
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A
B
A
Figure 4.49: Knife Drive Box
Check the torque of four knife drive box mounting bolts (A)
after the first 10 hours of operation, and every 100 hours
thereafter. Torque the bolts to 270 Nm (200 lbf·ft). When
tightening the bolts, start with the side mounting bolts.
MAINTENANCE AND SERVICING