How to Adjust the Brake Disc on a John Deere M

Turn off the John Deere tractor. Set a block of wood under the front lip of the deck and another block of wood under the deck in front of each rear brake.

Locate the caliper that clamps the disc brakes into place above the suspension leg. The caliper is a large, round metal object with bolts attached to hold the caliper in place on the brake housing.

Set a drip pan under one of the disc brakes. Remove the caliper retaining bolts with an adjustable wrench. Lift the caliper assembly up and off the tractor.

Pump the brake pedal two or three times while the tractor engine is turned off.

Turn on the tractor engine and pump the brake pedal two or three times again when the engine is on. This will move fluid into the caliper system and adjust the brake pads. Repeat on the other side.

Check along the brake lines for any evidence of leaks. Contact John Deere or another qualified tractor service professional for assistance if there is fluid leaking.

Examine the caliper assembly for rust or excessive dust. Clean it with brake cleaner and replace any rubber seals on the pistons that have worn out. Replacement seals can be purchased through John Deere, online or in many agriculture repair shops.

Put the caliper assembly back together and restore the retaining bolts into place. Remember to remove the wood blocks to lower the tractor deck back down prior to using the tractor.