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brake booster adjustment rod |
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johnsjavelin 
AMC Apprentice 
Joined: May/09/2015 Location: central wiscons Status: Offline Points: 134 |
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 Topic: brake booster adjustment rodPosted: Dec/27/2016 at 8:50am |
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Hi I have 72 Javelin AMX with front discs and drum rears.In my restoration replaced all brake lines ,brake proportioning valve, booster , master cylinder ,rotors , calibers wheel cylinders and all brakes. I have the 73/4 booster . I adjusted the push rod to tsm specs 1.200 and when adjusting the rod it pulled out of the booster socket then I pushed it back in. I bleed the master cylinder on the car ( I bent the old lines to make bleeder lines into the master) I do not get any air bubbles for the rear brakes . Do I need to lenghthen the rod ? Tell me what I did wrong . No motor in car putting it in this week T
 hanks |
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Dec/27/2016 at 9:01am |
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Probably bad lines or the tee block. You can reset the pressure at the distribution block, by having someone hit the brakes when you pull up on the pin. The pin can be accessed by removing the brake warning wire.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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6PakBee
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Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Online Points: 5457 |
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Posted: Dec/27/2016 at 11:14am |
Your bleeder lines, did you run them directly from the master cylinder ports back into the reservoirs? Did you follow the bleeding instructions that came with the new master cylinder to the letter? If so you may not have a problem. Just because you have no bubbles doesn't necessarily mean it isn't bled. Have someone run the brakes and look at the reservoir carefully, usually you can tell if you have flow out of the bleeder tubes by looking for 'ripples' in the reservoir. And that's really what you are trying to achieve, flow. |
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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johnsjavelin
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Joined: May/09/2015 Location: central wiscons Status: Offline Points: 134 |
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Posted: Dec/28/2016 at 6:18am |
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Ok I did Use the old brake lines and put the bent tubes in the master and fluid did flow a little bit in the rear brake reservoir. I will be
bleeding the system this weekend. Put the 401 in yesterday tranny 727 today Thanks
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53w
AMC Apprentice
Joined: Sep/14/2010 Status: Offline Points: 236 |
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Posted: Dec/28/2016 at 11:40am |
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Years ago i changed master cylinder on my 74 javelin had no bubbles that we saw and everything worked fine. I Changed booster and installed new master this fall had lots of bubbles to deal with. Some times you get lucky and it goes better then normal?
After rereading original post, with that much work done you should of had bubbles. Just may need to keep bleeding until they show up. We alway bleed shortest line first on each set until bubbles stop then go to other side. Start with front set then rear set. Edited by 53w - Dec/30/2016 at 9:32am |
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White70JavelinSST
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Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4866 |
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Posted: Jan/04/2017 at 9:23am |
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The master bleeds a lot better on the bench. Most instructions mention the master needs to be level. It's possible to get that in the car, however, if the master is not level, tiny bubbles will stay trapped in the master bore.
The last time I dealt with bleeding brakes I used a syringe (rather large one) I purchased for mixing two cycle oil/gas in small quantities for a chainsaw. (cheap method, vacuum bleeding tools are available) I put a round or two of teflon thread tape on each bleeder thread to seal it best. You may get good results without putting teflon on the threads, but when I tried it the bubbles never stopped until I put teflon on the threads. I used a long vinyl tube from the syringe to the bleeder. I looped the tube above the bleeder with the syringe below the bleeder. I could watch as bubbles went up into the loop. When the bubbles stopped appearing I called it good. I got a very solid pedal as a result. |
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70 Javelin SST, second owner, purchased 1972
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johnsjavelin wrote: