MTD 300 series Shop Manual page 17

NOTE: .To replace the drive belt on a three speed drive
system, the speed actuator arm needs to be removed.
8. Loosen the jam nuts that hold the speed control cable to the
bracket on the engine.
9. Adjust the nuts to provide slack in the cable.
10. Disconnect the speed control cable from the actuator arm.
See Figure 3.13.
11. Remove the bow tie clip from the pivot rod.
See Figure 3.14.
12. Pull the pivot rod free from the actuator arm.
13. Remove the actuator arm.
14. Pull the variable speed pulley yoke off of the crankshaft.
See Figure 3.15.
TRACTION DRIVE SYSTEM
Actuator arm
Speed
control
cable
Figure 3.13
Figure 3.14
Figure 3.15
pivot rod
Bow tie clip
Yoke
13