How to Adjust the Motion Drive Belt on a Murray Lawn Tractor

Written by steven douglas
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Murray calls the belt which provides power from the engine to the transmission a "motion belt." This belt receives a lot of wear and tear during normal operation of the lawn tractor and is usually one of the first components of the lawn tractor to fail. The belt is designed to be replaced, not repaired. Most operators can learn how to install a new motion belt when necessary.

Skill level:

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Things you need

  • Replacement motion belt
  • SAE socket set
  • Phillips screwdriver
  • Pliers

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  1. 1

    Park the tractor on a flat level surface, and disconnect the spark plug wire from the spark plug to prevent accidental starting of the engine. Remove the cottar pins from the deck adjuster arms and the suspension links. Remove the extension spring on the blade control arm.

  2. 2

    Disconnect the front deck hanger rod from the axle support. Pull the motion belt free from the stack pulley hanging down from the engine. Slide the mower housing out from beneath the tractor on the right-hand side.

  3. 3

    Engage the parking brake. Remove the idler pulley adjacent to the stack pulley. Remove the battery and battery tray to gain access to the belt guides which are beneath the battery compartment and adjacent to the drive pulley. Loosen the belt guides.

  4. 4

    Take the motion belt off the drive pulley. Remove the adjustment nut from the shifter bracket, and slide the motion drive belt over the top of the shifter bracket. Remove the motion drive belt from the stack pulley by pulling the front edge of the motion belt underneath the stack pulley. Pull it back between the steering plate and the stack pulley.

  5. 5

    Remove the access panel to gain access to the two Phillips screws that hold the steering shaft assembly in place. Remove the screws. Lift the steering wheel together with the steering shaft assembly. Push the motion drive belt underneath the steering shaft assembly to remove it completely.

  6. 6

    Install a new motion belt. Follow the dissassembly instructions in reverse order to return all the components removed to their normal operating positions. Tighten all nuts, bolts and screws tightly. Test the lawn tractor for normal operation.

Tips and warnings

  • Always have a replacement belt on hand before you begin to remove the old belt.

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