01bansheefox Posted December 27, 2012 Report Share Posted December 27, 2012 My rear brakes dont work so i picked up a used rear master cylinder off someone on here and it still wont work... I removed the line coming from the cylinder going to rear pads and no oil comes out when the rod is compressed and fluid is full. Shouldn't it be leaking out?? Quote Link to comment Share on other sites More sharing options...
Starwriter Posted December 27, 2012 Report Share Posted December 27, 2012 If you put oil in it, you just destroyed all of the rubber components in the brake system. Quote Link to comment Share on other sites More sharing options...
Rustynail Posted December 27, 2012 Report Share Posted December 27, 2012 I would assume when he says oil he really means brake fluid but you never know, assuming it is dot approved, did you replace the plunger and the resevoir? The diaphram in the ressy could have a hole in it. Quote Link to comment Share on other sites More sharing options...
01bansheefox Posted December 27, 2012 Author Report Share Posted December 27, 2012 Yes oil = brake fluid its an oil based fluid is it not? Fluid flows to the cylinder just fine from the ressy but when the line that goes to the caliper is removed from cylinder and I apply pressure to the rod no fluid comes out of the bolt hole im guessing thats an easy way to tell it needs a rebuild? Just curious for my own knowledge Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted December 27, 2012 Report Share Posted December 27, 2012 Yes oil = brake fluid its an oil based fluid is it not? Fluid flows to the cylinder just fine from the ressy but when the line that goes to the caliper is removed from cylinder and I apply pressure to the rod no fluid comes out of the bolt hole im guessing thats an easy way to tell it needs a rebuild? Just curious for my own knowledge NO, brake fluid is NOT a petroleum based fluid like oil is. If you put a petroleum based fluid in your brake reservoir, you have just RUINED the seals in the entire system. Assuming you used the correct fluid, you may just need to bleed the system properly. If you have properly bled it, then maybe it does need to be rebuilt. Quote Link to comment Share on other sites More sharing options...
Hazzard Racing Customs Posted December 27, 2012 Report Share Posted December 27, 2012 i know when i put my plus 10 swinger on it literally took for ever to get the brake fluid to come out of the end of the hose but i did notice if you put your finger over the hole and just leave a very small opening and try it comes out allot faster maybe some kind of pressure that needs to build up or something i would put the hose on and leave it disconnected at the rear caliper put your fingers over the holes and try like i said it will prob. take forever but will eventually come out unless you need a rebuild also have you tried to pre fill the line that will help allot Quote Link to comment Share on other sites More sharing options...
Ctown208 Posted December 27, 2012 Report Share Posted December 27, 2012 Buy a brake vacume pump or pump the shit out of it.. It takes a long time with out a pump Quote Link to comment Share on other sites More sharing options...
badassbanshee479 Posted December 28, 2012 Report Share Posted December 28, 2012 Pump the peddle a few times then crack the banjo bolt at the ressy... When ya start getting fluid there move onto bleeding the system from the banjo bolt at the caliper... When ya start getting a peddle move onto bleeding the system at the bleeder port at the caliper... Fastest and easiest way I have found to bleed rear brakes on a banshee Quote Link to comment Share on other sites More sharing options...
Pastrykiller Posted December 28, 2012 Report Share Posted December 28, 2012 Pumps are good but here is a hillbilly way. Crack the nipple and place clear rubber hose on the nipple. Make sure the hose is long enough for you to raise it higher than the master cylinder. Suck on the hose until you have fluid in the hose. One you get to this point, tighten the nipple. Then commence the brake bleeding process. Sound dangerous but its no different than when you siphon gas. Quote Link to comment Share on other sites More sharing options...
Hazzard Racing Customs Posted December 28, 2012 Report Share Posted December 28, 2012 good info guys Quote Link to comment Share on other sites More sharing options...
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