MacDon R1 Series Operator's Manual page 253

7. Observe the orientation of the grooves in shear pins (A).
IMPORTANT:
The correct shear pin orientation is critical. Both shear pin
grooves (A) must be parallel to the cutterbar. They do not
need to be facing in the same direction.
NOTE:
The shaft has been removed from the illustration for clarity.
8. Install nut (A).
9. Retrieve the Safecut spindle-nut wrench from the left
shield plate.
10. Attach Safecut spindle-nut wrench (B) by 90° (D) to torque
wrench (A).
IMPORTANT:
The Safecut spindle-nut wrench MUST be used with a
torque wrench.
11. Position Safecut spindle-nut wrench (B) on spindle nut (C).
Torque the nut to 300 Nm (221 lbf·ft).
12. Return Safecut spindle-nut wrench (B) to the left
shield plate.
262634
MAINTENANCE AND SERVICING
Figure 4.165: Shear Pin Orientation
Figure 4.166: Cutterbar Spindle
Figure 4.167: Spindle Nut
235
A
D
A
A
A
C
B
Revision A