Greg Rider Posted January 21, 2009 Share Posted January 21, 2009 I installed a replacement brake line and now I need to bleed her brakes. I got 3 of the 8 bleeders loose with DAYS of penetrating spray and very gentle pressure on a 6pt wrench. I tried tapping lightly on the bleeeders with a hammer to "help" the spray. I fear breaking one off and don't really want to open up that can o' worms. I've broken them on cars and pick-ups before and know that the wheel cylinder has to come out. I just want to prevent all that work over a $5.00 bleeder. Any advice please. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/ Share on other sites More sharing options...
Rob Posted January 21, 2009 Share Posted January 21, 2009 I installed a replacement brake line and now I need to bleed her brakes. I got 3 of the 8 bleeders loose with DAYS of penetrating spray and very gentle pressure on a 6pt wrench. I tried tapping lightly on the bleeeders with a hammer to "help" the spray. I fear breaking one off and don't really want to open up that can o' worms. I've broken them on cars and pick-ups before and know that the wheel cylinder has to come out. I just want to prevent all that work over a $5.00 bleeder. Any advice please.A little heat around the threads of the wheel cylinder and penetrating oil as the area cools followed by a little vibration from an air hammer somewhere close to the area ususally works. You do not need enough heat to destroy seals, just get the area a couple hundred degrees, (warm). The cooling down will draw the penetrant into the threads as it cools and the vibration helps it.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29517 Share on other sites More sharing options...
MACKS Posted January 21, 2009 Share Posted January 21, 2009 Try a brazeing tip on your torch so you can pinpoint the heat to where you need it. Quote Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29519 Share on other sites More sharing options...
Greg Rider Posted January 21, 2009 Author Share Posted January 21, 2009 I don't have a big torch set but I will try with the propane unit. I was concerned about the heat with the seals. Just not looking foward to removing drums on that rear-end if it goes wrong. Thanks for the advice. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29521 Share on other sites More sharing options...
Rob Posted January 22, 2009 Share Posted January 22, 2009 I don't have a big torch set but I will try with the propane unit. I was concerned about the heat with the seals. Just not looking foward to removing drums on that rear-end if it goes wrong. Thanks for the advice.Use Mapp gas Greg. Propane will not concentrate the heat as needed due to lack of BTU content in the fuel gas.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29522 Share on other sites More sharing options...
Greg Rider Posted January 22, 2009 Author Share Posted January 22, 2009 Use Mapp gas Greg. Propane will not concentrate the heat as needed due to lack of BTU content in the fuel gas.RobI did not know that! Learn something new everyday! That's why I trust the people on this forum. The only BS here is the fun kind. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29524 Share on other sites More sharing options...
Rob Posted January 22, 2009 Share Posted January 22, 2009 I did not know that! Learn something new everyday! That's why I trust the people on this forum. The only BS here is the fun kind.Everybody says I'm full of it.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29533 Share on other sites More sharing options...
Greg Rider Posted January 22, 2009 Author Share Posted January 22, 2009 I'm full now! Had Tater-tot casserole and Toll House cookies for dinner Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29534 Share on other sites More sharing options...
Rob Posted January 22, 2009 Share Posted January 22, 2009 I'm full now! Had Tater-tot casserole and Toll House cookies for dinner And I wasn't invited?? A little Tabasco sauce to go with that fine cuisine and I'd be set.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29538 Share on other sites More sharing options...
Greg Rider Posted January 22, 2009 Author Share Posted January 22, 2009 And I wasn't invited?? A little Tabasco sauce to go with that fine cuisine and I'd be set.RobNo, just a big wopp of sour cream!! Chased it with a half frozen Cherry Coke! Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-29543 Share on other sites More sharing options...
other dog Posted February 2, 2009 Share Posted February 2, 2009 I'm full now! Had Tater-tot casserole and Toll House cookies for dinner "...I do like tater tots..."- Clint Eastwood on whether or not to eat the governors t-bone steaks and tater tots, in the movie where he's after Kevin Costner, who has the little boy in the casper the ghost costume. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30199 Share on other sites More sharing options...
other dog Posted February 2, 2009 Share Posted February 2, 2009 I did not know that! Learn something new everyday! That's why I trust the people on this forum. The only BS here is the fun kind.I never even heard of mapp gas. Rob knows his s-...stuff, I mean Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30200 Share on other sites More sharing options...
Greg Rider Posted February 2, 2009 Author Share Posted February 2, 2009 I never even heard of mapp gas. Rob knows his s-...stuff, I mean Yes I think Rob knows his gas! Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30202 Share on other sites More sharing options...
other dog Posted February 2, 2009 Share Posted February 2, 2009 I installed a replacement brake line and now I need to bleed her brakes. I got 3 of the 8 bleeders loose with DAYS of penetrating spray and very gentle pressure on a 6pt wrench. I tried tapping lightly on the bleeeders with a hammer to "help" the spray. I fear breaking one off and don't really want to open up that can o' worms. I've broken them on cars and pick-ups before and know that the wheel cylinder has to come out. I just want to prevent all that work over a $5.00 bleeder. Any advice please.What I meant to say was-if all else fails, you can crack (loosen, I should say) the line where it goes into the wheel cylinder and bleed it there. However,That will only release the bulk of the air from the cylinder. The bleeder screw is placed at the highest point of the fluid cavity as to facilitate entrapped air rising to that elevation to be removed by "bleeding". As you will remember from elementary physics: A fluid medium, (liquid) cannot be compressed. A gaseous medium, (air in this case) readily compresses to many times it's atmospheric pressure/state. Hydraulic power is based upon the principal that a liquid cannot be compressed. This lack of compression allows the movement of fluid under pressure to perform mechanical work. In this case, ultimately spreading of brake shoes to provide friction against a brake drum. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30203 Share on other sites More sharing options...
Rob Posted February 2, 2009 Share Posted February 2, 2009 if all else fails, you can crack (loosen, I should say) the line where it goes into the wheel cylinder and bleed it there.That will only release the bulk of the air from the cylinder. The bleeder screw is placed at the highest point of the fluid cavity as to facilitate entrapped air rising to that elevation to be removed by "bleeding". As you will remember from elementary physics: A fluid medium, (liquid) cannot be compressed. A gaseous medium, (air in this case) readily compresses to many times it's atmospheric pressure/state. Hydraulic power is based upon the principal that a liquid cannot be compressed. This lack of compression allows the movement of fluid under pressure to perform mechanical work. In this case, ultimately spreading of brake shoes to provide friction against a brake drum. Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30208 Share on other sites More sharing options...
other dog Posted February 2, 2009 Share Posted February 2, 2009 That will release the bulk of the air from the cylinder, ultimately spreading shoes to provide friction against a drum. Robyep Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30212 Share on other sites More sharing options...
b61fred Posted February 2, 2009 Share Posted February 2, 2009 hi, I have a bleeder screw extractor set, it has a rod that goes in the center of the bleeder and keeps it from collapsing and rounding off the nut. Works much better than it sounds.Fred Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30214 Share on other sites More sharing options...
Greg Rider Posted February 2, 2009 Author Share Posted February 2, 2009 I may crack the lines because the replacement was at the master cylinder. I took out the line-lock for some needed room under the dash. I was going to set the shoes out tight so bleeding would be true. I know that a lot of time is wasted pushing the shoes out trying to get a firm pedal. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30215 Share on other sites More sharing options...
BulldogVision Posted February 2, 2009 Share Posted February 2, 2009 That will only release the bulk of the air from the cylinder. The bleeder screw is placed at the highest point of the fluid cavity as to facilitate entrapped air rising to that elevation to be removed by "bleeding". As you will remember from elementary physics: A fluid medium, (liquid) cannot be compressed. A gaseous medium, (air in this case) readily compresses to many times it's atmospheric pressure/state. Hydraulic power is based upon the principal that a liquid cannot be compressed. This lack of compression allows the movement of fluid under pressure to perform mechanical work. In this case, ultimately spreading of brake shoes to provide friction against a brake drum. RobWait a minute......Will the person using Rob's identity please untie him and let him go!!!!!!!!!! Quote My 'ol dog has a bite worse than it's bark!!!!!!!! Ummmmm....Is this the number I dialed???????? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30220 Share on other sites More sharing options...
BulldogVision Posted February 2, 2009 Share Posted February 2, 2009 Oh yeah, don't use Mapp on a propane head......Different orifices and you may not like the results.......... Quote My 'ol dog has a bite worse than it's bark!!!!!!!! Ummmmm....Is this the number I dialed???????? Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30221 Share on other sites More sharing options...
other dog Posted February 2, 2009 Share Posted February 2, 2009 Oh yeah, don't use Mapp on a propane head......Different orifices and you may not like the results..........I use it when I get lost too. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30231 Share on other sites More sharing options...
other dog Posted February 6, 2009 Share Posted February 6, 2009 That will only release the bulk of the air from the cylinder. The bleeder screw is placed at the highest point of the fluid cavity as to facilitate entrapped air rising to that elevation to be removed by "bleeding". As you will remember from elementary physics: A fluid medium, (liquid) cannot be compressed. A gaseous medium, (air in this case) readily compresses to many times it's atmospheric pressure/state. Hydraulic power is based upon the principal that a liquid cannot be compressed. This lack of compression allows the movement of fluid under pressure to perform mechanical work. In this case, ultimately spreading of brake shoes to provide friction against a brake drum. Robthat's the same thing I said Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30378 Share on other sites More sharing options...
Rob Posted February 6, 2009 Share Posted February 6, 2009 that's the same thing I said I thought I was listening to the 2nd harmonic of the converstation but could not discerne if I were correct, nor had a strip line filter readily available to be certain, so I apparently posted out of context.I apologize for the replication/repeat of the information presented forth wit.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30379 Share on other sites More sharing options...
other dog Posted February 6, 2009 Share Posted February 6, 2009 I thought I was listening to the 2nd harmonic of the converstation but could not discerne if I were correct, nor had a strip line filter readily available to be certain, so I apparently posted out of context.I apologize for the replication/repeat of the information prestented forth wit.Rob...huh? Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30380 Share on other sites More sharing options...
Rob Posted February 6, 2009 Share Posted February 6, 2009 ...huh? What part was lost in the translation? I will be happy to make attempt to clarify.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/8050-bleeder-screws/#findComment-30404 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.