All parts included for change-out including 3/16" drill bit.

1. Remove tug handle with drill from transmission receiver. It is easiest to perform the installation with the transmission clamped securely up-side down on a work bench.

2. Rotate existing drive roller and sprocket as necessary using a 3/8” ratchet in the tug drive socket before removing split pins. BE SURE THAT YOU HAVE AT LEAST 2" CLEARANCE ON OPPOSITE SIDE for removal of pins. Note position of all components before removal.

3. Remove existing drive roller and sprocket by driving out split pins using a 5/32" hardened drift pin at least 3" long. Tap drive axle out, discard.

4. Re-install new drive axle, new drive roller and existing sprocket and chain. Use a screwdriver between drive roller and sprocket gently pressing sprocket and drive roller against bearings. Align axle ends flush with bushings.

5. The pre-drilled holes in both drive roller and sprocket provide proper alignment for drilling holes through the new axle. We advise using the high speed setting on your drill and the use of cutting oil for drilling these holes.

6. Drill a 3/16" hole through new axle for drive roller first. Double check that it is flush to the bushing and that the axle is flush to the outside of the bushing. Install split pin fully using a hammer and punch.

7. Drill a 3/16" hole through new drive axle for sprocket. Double check that it is flush to bushing. Install split pin fully using hammer and punch. If you have a 9 tooth drive sprocket, bore a fresh hole at 90˚ from existing hole.

Drill holes slowly and maintain a firm grip on your drill. As the drill bit breaks through drilling the hole in the drive axle it will want to suddenly pull down. A broken drill bit is extremely difficult to remove.