Adjusting Knife And Guards - MacDon A40D Unloading And Assembly Instructions

5.16 Adjusting Knife and 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.
1. Shut down the engine, and remove the key from the ignition.
2. Check guards for signs of heating during run-up due to
insufficient clearance between guard and knife.
3. Using a feeler gauge, check for a 0.25 mm (.01 in.) gap
between knifehead (A) and pitman arm (B). If gap is
incorrect, adjust by loosening bolt (C), and tapping
knifehead (A) with a hammer. Retighten bolt.
NOTE:
If a feeler gauge is not available, a business card should
slide easily through gap.
IMPORTANT:
Over-greasing can cause the knife to bend and make
contact with the guards closest to the knifehead. Check for
signs of excessive heating on first few guards after greasing.
If required, relieve some pressure by pressing the check-
ball in grease fitting or remove grease fitting.
4. Adjust guard alignment as necessary using guard
straightening tool (MD #140135). Adjust guard tips upwards
by positioning tool as shown and pulling up.
262335
PERFORMING PREDELIVERY CHECKS
Figure 5.65: Knifehead and Pitman Arm
Figure 5.66: Guard Tips – Upward Adjustment
128
C
A
B
Revision A