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Old 08-30-2001, 12:56 PM   #1 (permalink)
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Angry Why won't my brakes work better?

Heres the problem. The brakes work better than the drums by far but they have never worked like the ones on my toyota pickup. I cannot lock them up or really even get close to that. They stop but I want and expect better.

Heres what I have:
I have a 74 cruiser with minitruck discs on the front using IFS toy calipers and 82 cruiser vented rotors.
The Booster is an 82 toy pickup and the MC is a 91 Extended cab v-6 toy pickup 1" bore.
The rear brakes are the stock 2 cylinders per wheel cruiser brakes.

Is the problem that I have the 4 wheel cylinders in the back instead of the 2 toyota pickup ones that the MC was designed for?

Or????

My cruiser does weigh a normal amount for a FJ40...4500lbs and runs 35s and a normal v-8 (no big cam to rob vacuum from the booster).
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Old 08-30-2001, 03:05 PM   #2 (permalink)
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I would guess it's either your rear shoes need adjusting, or the master is not pushing enough fluid to properly engage the rear shoes.
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Old 08-30-2001, 11:27 PM   #3 (permalink)
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What do you mean that you can't lock them up?
If you can't lock at least the fronts when you stand on them, then either the MC is not correct (piston too big) or the booster isn't working. The MC from a disk brake FJ40 would seem apropriate.
If the pedal comes up when you pump them, then they need adjusting. If they feel spongy, then they need bleeding.
If the rears won't lock, check the shoe contact pattern; maybe they aren't arced correctly.
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Old 09-01-2001, 12:23 AM   #4 (permalink)
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I bench bled the mc last night then bled each wheel cylinder and adjusted the rear brakes again ((did it two weeks ago...the last time I drove it).
I checked the brake pedal to brake booster rod clearance...tight.
Then I went to check the booster to mc rod clearance and there was two gaskets and one was an extra thick one like what you would use on a differential cover!
Removed that and the pedal is quite firm and sits quite a bit higher when pressed on. I havn't done a test drive yet but just from the feel of the pedal they should be better.

My mc is a 1" bore off of a 90 toy pickup...what is the bore on a disc brake cruiser (like a 77 fj40)?
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Old 09-01-2001, 07:24 AM   #5 (permalink)
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I bet it would stop better if you put flames on it. I got your 1in. bore hangin. When I talked to you last night I thought you meant the rod from the pedal to the booster that is why I didnt understand the whole gasket thing. Lets see if it helps and go to Naches .
Oh your already on your way over cause you will be here in 20mins.
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Old 09-04-2001, 12:56 PM   #6 (permalink)
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No improvement yet. <IMG SRC="smilies/frown.gif" border="0">

I'm thinking it is that the 90 toy mc is setup for only two rear wheel cylinders...not the four like cruisers have.
Would you agree?
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Old 09-04-2001, 04:08 PM   #7 (permalink)
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Yes I agree. I think the rear reservior is not designed to pust that much volume.

I wonder if a fj 40 disc brake m/c would have enough volume that when you go to rear discs you wont need to replace the m/c. That would be nice. You might want to post something to a fellow member named Qbert he seems to have a good handle on the whole pressure/ hydraulic concept.I will be calling today on those calipers

Talk to you soon.
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Old 09-05-2001, 12:33 AM   #8 (permalink)
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WOW I think I can help....

what you need is a moroso blue in line preshure valve it keeps 10 lb of preshure
in the line for drum breaks.

they also sell a red one that keeps
2 lb for disk breaks.

they are realetively cheep from sumit or
jegs.

I mounted mine in line close to the master.

The only problem I had mounting it was
finding fitings that convert it from
american threads to metric.

any way I got the corect fittings at
western oil it is near portland avenue
and 99. I am shure you know
whare I am talking about this is the
same company that was next to the
spegety factory.

If you have never been ther then you should
check them out they will make custom hidralic hoses while you wait.

this will make youre system work great.
and is a cheep fix while you are at it
might as well add a line lock.

ps I am looking for a good 350 moter
I will probubly buy a rebuild but
thought I would mention it just in case
you might have one for sale or know
of any good deals.
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Old 09-05-2001, 04:08 PM   #9 (permalink)
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Hey Land crusher thanks I can use some of that info myself. That store you speak of is called WILLIAMS OIL FILTER.
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