Measure the Drive Tumbler Tread Outer Diameter, Claw Length and Tread Width
Drive Tumbler Tread Outer Diameter – Ruler – Measure the thickness of the Tread Depth using a calliper with the teeth located in the 2 position: 1. On the top of the Tear drop 2: Middle of the outer Surface of the Tread Path as shown in the diagram.
Drive Tumbler – Claw Length – Ruler
Use a Template placed over the Claw, to measure the width C and effectively the wear of the Claw
Drive Tumbler – Tread Width – Template –
Measure the Tread Width (B) using a Template placed on the Tread as shown in the Image