MacDon A40D - Checking and Adjusting Left Timing Belt Tension; Removing Timing Belt from Left Side

262334 169 Revision A
Checking and Adjusting Left Timing Belt Tension
To check and adjust the tension of the left timing belt, follow these steps.
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.
IMPORTANT:
To prolong the belt and the drive life, do NOT over-tighten belt.
1. Shut down the engine, and remove the key from the ignition.
2. Open the left endshield.
1005946
A
B
C
D
Figure 4.71: Left Timing Belt
3. Apply a force of 22–30 N (5–6.5 lbf) on belt (A) at midspan.
The belt should deflect 14 mm (9/16 in.). If necessary,
adjust as follows:
a. Loosen three nuts (B) and the jam nut on adjuster
bolt (C).
b. Turn adjuster bolt (C) to move pulley (D) until the
required tension is achieved.
c. Tighten the jam nut at location (C) and three nuts (B).
4. Close the endshield.
NOTE:
Readjust the tension of the new belt after 5 hours of
operation.
Removing Timing Belt from Left Side
To remove the knife drive timing belt from the left side of an auger header, follow these steps.
1. Shut down the engine, and remove the key from the ignition.
1002760
B
A
Figure 4.72: Gearbox Locking Bolts
2. Open the shield on the header’s left side.
3. Loosen three bolts (A) that lock the bottom drive pulley
in place.
4. Loosen adjusting bolt (B) to loosen the belts.
MAINTENANCE AND SERVICING