SunlitComet
OBS Jedi-Do Good
Your mechanic does not want to buy? Why not?
How to: NBS master cylinder swap for firm brake pedal
- Thread starter _Dylan_
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saif najd
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No the market or the dealers they don't want to buy new parts! They are selling old parts I have no idea why but for sure someone is making good amount of money out of this!
The known spare parts shops they hate me now because I found out this secret and some of them refused to sell me or deal with me
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SunlitComet
OBS Jedi-Do Good
They might be seeing the trends where you live changing and are trying to monopolize the money from it.
saif najd
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True, unfortunately the people who control this market (auto spare parts market) have one concept only "fake nock off parts" only
And they are very good at it!!
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nomad
Member
Saga Continues
Nak, thought I give you an update, after about 1/2 gallon on brake fluid, 1 new obs mc, $195.00 tools and parts(pressure bleed an MC replacement) the brakes are decent. Notice I said decent, not spectacular.
What was interesting was I could not find a shop that would actually do a true "pressure bleed". I had some that told me a pressure bleed was actually a 2 man pedal push bleed rather than pressuring the MC. I did have one shop that knew what I talking about and said they could to it but when I drove over and asked to see the mc pressure adapter they said "we have to find it".
After having a good friend of mine (who is a master machinist) make me one we must have bled it 10 times with no real difference. Next, new obs mc and tried again. This time the results were better and the pedal was better. It did take a combination of cycling the abs unit (using the tech 2) in coordination with the pressure bleed.
Test now have the rears locking up a split second sooner then the fronts. (like you mentioned because of the dual servo and prop valve).
Since I know the "code" I need for the prop/combi valve going to visit some junk yards to see it I can find one. Otherwise drop another $150. to order one.
Though the brakes are better then they were I still believe the ultimate solution is hydroboost.
For now its ok but when I finally stumble across a complete hydroboost setup say byebye to the vacuum setup.
Dan
Nak, thought I give you an update, after about 1/2 gallon on brake fluid, 1 new obs mc, $195.00 tools and parts(pressure bleed an MC replacement) the brakes are decent. Notice I said decent, not spectacular.
What was interesting was I could not find a shop that would actually do a true "pressure bleed". I had some that told me a pressure bleed was actually a 2 man pedal push bleed rather than pressuring the MC. I did have one shop that knew what I talking about and said they could to it but when I drove over and asked to see the mc pressure adapter they said "we have to find it".
After having a good friend of mine (who is a master machinist) make me one we must have bled it 10 times with no real difference. Next, new obs mc and tried again. This time the results were better and the pedal was better. It did take a combination of cycling the abs unit (using the tech 2) in coordination with the pressure bleed.
Test now have the rears locking up a split second sooner then the fronts. (like you mentioned because of the dual servo and prop valve).
Since I know the "code" I need for the prop/combi valve going to visit some junk yards to see it I can find one. Otherwise drop another $150. to order one.
Though the brakes are better then they were I still believe the ultimate solution is hydroboost.
For now its ok but when I finally stumble across a complete hydroboost setup say byebye to the vacuum setup.
Dan
Last edited:
nomad
Member
God gives the squirl an accorn in the form of a hydroboost setup
Looks like the junk yard gods rewarded me today, finally after at least a dozen trips to the salvage yard I found a complete JD7 Hydroboost system with MC and ABS unit, correct prop/combi valve, brake pedal, lines and a bonus, powersteering cooler and all the lines!
Snagged it out of a 2000 OBS Escalade. Seems the caddy met with an early death and was rolled but the parts I needed looked really good. I was lucky to find this score, the truck had just been put out in the yard a few days earlier.
Probably the worst part of the job was removing the brake pedal. Speedo was already gone so I have no idea on the mileage on the parts. I am considering trying to get a rebuild kit for the hydroboost unit. Looking at the shop manual it doesn't seem like a big deal to do so. Bottom line is if there is a decent rebuild kit available.
I will post as the project proceeds!
Dan
Looks like the junk yard gods rewarded me today, finally after at least a dozen trips to the salvage yard I found a complete JD7 Hydroboost system with MC and ABS unit, correct prop/combi valve, brake pedal, lines and a bonus, powersteering cooler and all the lines!
Snagged it out of a 2000 OBS Escalade. Seems the caddy met with an early death and was rolled but the parts I needed looked really good. I was lucky to find this score, the truck had just been put out in the yard a few days earlier.
Probably the worst part of the job was removing the brake pedal. Speedo was already gone so I have no idea on the mileage on the parts. I am considering trying to get a rebuild kit for the hydroboost unit. Looking at the shop manual it doesn't seem like a big deal to do so. Bottom line is if there is a decent rebuild kit available.
I will post as the project proceeds!
Dan
Last edited:
SunlitComet
OBS Jedi-Do Good
saif najd
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Wow lucky you!
I wish I could get the ABS setup as good and clean as yours
Sent from my GT-I9505G using Tapatalk
I wish I could get the ABS setup as good and clean as yours
Sent from my GT-I9505G using Tapatalk
Looks like the junk yard gods rewarded me today, finally after at least a dozen trips to the salvage yard I found a complete JD7 Hydroboost system with MC and ABS unit, correct prop/combi valve, brake pedal, lines and a bonus, powersteering cooler and all the lines!
Snagged it out of a 2000 OBS Escalade. Seems the caddy met with an early death and was rolled but the parts I needed looked really good. I was lucky to find this score, the truck had just been put out in the yard a few days earlier.
Probably the worst part of the job was removing the brake pedal. Speedo was already gone so I have no idea on the mileage on the parts. I am considering trying to get a rebuild kit for the hydroboost unit. Looking at the shop manual it doesn't seem like a big deal to do so. Bottom line is if there is a decent rebuild kit available.
I will post as the project proceeds!
Dan
nomad
Member
SunlitComet
OBS Jedi-Do Good
No, unfortunately I did not even tho I bought the special tools 1-2 years ago. The accumulator was no good on it for one problem it had (others would be done by the kit) and I could not find a replacement online so I swapped it with a remaned A1cardone part. should be in today for sure. If your accumulator is non reusable or the spool valve is scored just trade it in and let the parts re-builder spend the resources to fix and resell. Unless you can find the hard parts.
---------- Post added at 10:06 AM ---------- Previous post was at 10:05 AM ----------
I would like to note that my current vacuum booster is not a core because of the switching of the boosters so I will likely do a tear down with pics to determine exactly how it failed before tossing it.
---------- Post added at 10:06 AM ---------- Previous post was at 10:05 AM ----------
I would like to note that my current vacuum booster is not a core because of the switching of the boosters so I will likely do a tear down with pics to determine exactly how it failed before tossing it.
nomad
Member
Your teardown and pictures should prove to be very interesting, by the way where did you find the tools to service the hydroboost and were they very expensive?
Dan
SunlitComet
OBS Jedi-Do Good
Found on eBay for about maybe $45 total. 2 years ago.
nomad
Member
Change of plans!
This last weekend an autodealer saw my Tahoe and just had to have it. Well, anything is for sale at the right price. Needless to say he offered the right price and now its gone.
So, now I have a complete and matched JD6 hydroboost system I will be selling, it consists of:
Hydroboost unit
Master Cylinder
All hoses
Power steering/hydroboost cooler
ABS controller - complete
Brake pedal
Everything is clean and ready to go, I will sell it for what I have in it which is
$195.00 plus whatever the actual shipping costs are.
I thought I would place it here because many are interested in doing this conversion. I will place an add the the forsale section later this week if no one is intersted, Pictures available.
Thanks,
Dan
This last weekend an autodealer saw my Tahoe and just had to have it. Well, anything is for sale at the right price. Needless to say he offered the right price and now its gone.
So, now I have a complete and matched JD6 hydroboost system I will be selling, it consists of:
Hydroboost unit
Master Cylinder
All hoses
Power steering/hydroboost cooler
ABS controller - complete
Brake pedal
Everything is clean and ready to go, I will sell it for what I have in it which is
$195.00 plus whatever the actual shipping costs are.
I thought I would place it here because many are interested in doing this conversion. I will place an add the the forsale section later this week if no one is intersted, Pictures available.
Thanks,
Dan
retorq
Full Access Member
Pics?? Where in the Midwest are you at??
nomad
Member
I am located just north of albuquerque NM, if you check on an earlier post by me you will se a picture of what I am selling,
Everything you need to do the conversion, brackets, cooler, lines, correct abs and matching master, everything is in great condition, what you see is what you get!
Use you existing powersteering pump using a tee or add a return line to your case.
I will post some additional pictures later today, you can also pm me and send me your email and I will send some directly to you.
Thanks
Dan
Adding pictures:
Everything you need to do the conversion, brackets, cooler, lines, correct abs and matching master, everything is in great condition, what you see is what you get!
Use you existing powersteering pump using a tee or add a return line to your case.
I will post some additional pictures later today, you can also pm me and send me your email and I will send some directly to you.
Thanks
Dan
Adding pictures:
Last edited:
xanatost
Full Access Member
Dose this work on a 1998? I have ABS system all ready on mine, would I need to change it out to the one you have??
nomad
Member
Should work on any 95 thru 00 (obs)Tahoe, Yukon, burb and trucks. I got the ABS unit because I wanted all matching parts. If you didnt choose to use it I would at least change the prop/combi valve from this one to your unit.
This way your brakes will be properly balanced and your abs will work perfectly with the new system.
If you have any additional questions PM me.
Thanks
Dan
xanatost
Full Access Member
SunlitComet
OBS Jedi-Do Good
then comes the variable steering issue.
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