BD Brake Sticking

[PaulG1]

I have one of the old style BD exhaust brakes (located just before the muffler).



Problem is it sticks from time to time and won't close the exhaust valve to build pressure when you want it (not a good thing!).



I've tried spraying WD40 on butterfly valve axle and this seams to work for a while but quickly looses its effectiveness.



Anyone ever have this problem and know of a decent fix for it?



Thanks a bunch.



Paul

 

[Woodenhead]

My brake quit working a while back and it turned out to be the electric solenoid that switches the vacuum. My buddy had my truck at the time so he fixed it but I'm pretty sure he just yanked the electric solenoid, opened it up, cleaned it, put it back together and it's been fine ever since.



Check to be sure the vacuum is actually being switch or can you here the "click" of the solenoid with the truck off?



Another thing I've done is use some silicon spray in the big vacuum solenoid and on the joints to keep things sliding.



Good Luck,

Mike

 

[PaulG1]

I believe the old style exhaust brake is a solenoid only (no vacuum cylinder) - can these be taken apart and cleaned maybe this is what is hanging up - or the butterfly valve - like the exhaust gas dry all lubricant out and essentially leave metal on metal.



Any ideas on this?



Thanks again.



Paul