| Author | Message | ||
| Larry K Dixon (Larry_d)
Rating: N/A |
Here I am again does anyone know if the brake adjust is a bolt that is turned or is it sometype of wedge? Thanks larry | ||
| Cliff (Floridacracker)
Rating: N/A |
Larry, The slack adjuster is a bolt. Cliff | ||
| Ron Walker (Prevost82)
Rating: N/A |
Make sure you turn the adjuster the way, or you will be loosening the brakes. | ||
| Jack Conrad (Jackconrad)
Rating: N/A |
There is a ring around the bolt head that prevents the bolt from turning and "un-adjusting" the brakes. This ring is spring loaded and has to be depressed to turn the bolt to adjust the brake. Make sure the ring pops back up (this may require a slight turn of the bolt). Also make sure parking brake is released before trying to adjust drive axle brakes. Hope this helps, Jack | ||
| John Jewett (Jayjay)
Rating: N/A |
Jack is correct on all points. I would only add: use a 9/16 deep well socket to make it easier to push the spring-loaded ring around the bolt head in . A few pounds of pressure and then turn the nut. Have a helper spin the wheel slowly while you do the adjustment, and STOP at the first hint of brake drag. Any tighter just wears out the shoes prematurely. The adjustment nut is near the leading edge of the brake arm that is attached to the brake can actuator rod. Cheers... JJ | ||
| Larry K Dixon (Larry_d)
Rating: |
Thanks much everyone had a person tell me he though the ajusters mite be the wedge type. Have a little exp. with the slack adjusters, so Monday will be the day. Makes it better if I have some idea before hand, thanks ALL for the help. larry 75 4905 | ||
| Chuck Lott (Chuckmc8)
Rating: N/A |
Larry, here's a nice site with air brake pics http://www.e-z.net/~ts/ts/Adjust.htm there are lots more, just do a web search for "adjust air brakes" | ||
| John MC9 Rating: N/A |
Chock and block the bus. Don't get crushed. | ||
| Earl-8-Ky Rating: N/A |
There is no need to jack the bus up to adjust the brakes. I usually wash the adjusting bolt down with WD40 to clean it. If it is very dirty a couple of licks with a wire brush will make it a lot easer to adjust it. Just turn the adjusting bolt till it is snug. You then need to back it off 1/4 turn, Your braks will be adjusted right. I ran trucks and have done this several times. It is a lot easer to do it this way. | ||
| John MC9 Rating: N/A |
I adjust mine the same way, Earl, there's no need to jack. But...the bus can be less than 6" off the ground without air. And..... the parking/emg brake can not be set. Chocking and blocking would be the only way I'm going to crawl under it, and I wouldn't recommend anyone do otherwise. | ||
| Brian (Bigbusguy)
Rating: N/A |
The brakes on a 4905 are S cam. Not wedge type. To release the parking brake a full service applaction has to be done after the parking brake is released to release the locking thing in the brakes. You can tell when the shoes are touching by taping the drum with a small hammer and hear it ring when the shoes are not touching adjust til you hear the ringing sound change and then back it off bit. Thats the easest way to do with the wheel on the ground. Then pull it by hand to see if it only moves a 1" to 1 1/2" til the shoes are tight to the drum.Thats the way I did it for milions of miles on my trucks and never failed a DOT insp. If you have some one to push the brake pedel that would be the best way to make sure you did it right. You want the lest amount on movement with out having the brakes draging . Jacking the wheel and spining is the best way if you have the time and tools. Brian 4905 Klamath Falls Oregon | ||
| Johnny Rating: N/A |
"Also make sure parking brake is released before trying to adjust drive axle brakes." You mean I'm not the only one who did this the first time they adjusted air brakes? I feel a little less stupid now...  |
