replacement of rear slack adjusters on a 1990 L-8000 STEP BY STEP
Country: United StatesMake: FordModel: L 8000Year: 1990
BROKEN THE ADJUSTER TRYING TO ADJUST IT.NOW I NEED TO REPLACE IT. BOTH SIDE OF THE REAR TANDEM AXLE.
Park the truck in a safe working area and set the air brakes.
Put the wheel chocks behind both rear tires so that the truck will not roll
Get back in the truck and release the air brakes by pushing in on the air brake handle.
Locate the air tank on the side of the truck and slowly open the valve to release any excess air from the system. This will remove all air from the braking system and make the slack adjusters free moving. you should hear the brake button pop out
Crawl under the rear of the truck and locate the slack adjuster. Loosen the slack adjuster by turning the adjuster bolt head on the rear of the slack adjuster counter clockwise. This will loosen the slack adjuster up from the S-cam
Remove the pin from the connecting rod that connects the slack adjuster to the air brake chamber. Start by pulling the cotter pin out of the end of the rod with the pliers. Then, tap the pin through the end of the connecting rod with the rubber mallet. Pull the pin out and place it with the cotter pin.
Remove the locking washer on the side of the slack adjuster with the flat-head screwdriver. This locking washer is what holds the S-cam rod inside of the slack adjuster.
Tap the side of the slack adjuster with the rubber mallet towards the end of the S-cam rod until the slack adjuster comes off. Then, pull the slack adjuster off of the S-cam rod and put the new slack adjuster onto the S-cam rod.
Reverse the same steps above for installing the new slack adjuster. Once the new slack adjusters are on, go back to the air tank and close the valve.
Crank the truck up and allow the air pressure to build back up to at least 120 psi. Then push the air brake button in
Crawl back under the truck and remove both spring brake adapters adjust the slack adjusters and mark the connecting rod where it goes into the back of the air brake chamber with the chalk
Go back to the front of the truck and release the air brake . Then, go back to the slack adjusters and locate the chalk mark on the connecting rod. The chalk mark should be moved at least two inches away from the back of the air brake chamber.
Set the air brakes back by pulling out on the air brake valve and turn the engine off. Remove the wheel chocks from the back of the wheels.
MASTER ASE 30 YEARS