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Brake Problem

Tech Talk for Mitsubishi owners.

Moderator: -Scott-

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Brake Problem

Post by Drift Technician »

Ok guys was 4wding yesterday brakes were working normal, gave them a bit of a hard workout climbing soem creek bed walls, now the brake pedal is extremley hard and there is little to no brakes whatsoever. Brakes were working fine before this, i noticed the resivor was a little empty after coming back so i put more brake fluid in but hasnt done anything. BTW its a 83 SWB Paj................
If its not upside down and on fire, I'm not trying hard enough.......

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Post by J Top »

It sounds like your booster has stopped working.
Put your foot firmly on the brake pedal and start the engine,if the booster is working it will suck the pedal down ,maybe an inch or so.
Does the engine still idle? are all the vaccum hoses on?
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Post by -Scott- »

Yep - I'd start with buggered booster. But I've never had to fix one, so I can't offer any more advice.

Good luck,

Scott
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Post by Drift Technician »

pedal doesnt go down at all when the car is started..... engien runs and idles fine im assuming you guys mean the master cylinder when you mean booster?
If its not upside down and on fire, I'm not trying hard enough.......

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Post by J Top »

The booster is the cylinder behind the M/C that the M/C is bolted to.
I would have thought that if the booster was faulty the idle would be upset
Start with the basics,bleed the brakes,jack the wheels off the ground and see if the brakes are working at all the wheels.
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Post by 4runna »

Is it Petrol or diesel?

Idle won't be upset if it's a diesel as it's only a vacuum pump running it.

If it's a petrol, it could be a very small leak in the booster diaphragm or vacuum hose.
Or an even more common one (especially with the number of V6 pajeros I have seen smoking,) the vacuum pipe or t piece gets blocked with oil scum and carbon, give it all a check, especially around the inlet manifold outlet and 1 way valve (if installed)
if it's just blocked up then obviously it won't affect your idle either.

Rob
96 Paj 2.8 TD 2" lift, Snorkel, LR Tank, Dual Batt, winch, 32 MTRs, RT tent and rack, polyairs etc
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Post by Drift Technician »

Its petrol, the good old 2.6 litre. Only vacumn hose i can see is a large onw running from the booster to the inlet manifold. Inspected it for leaks and such but couldnt find anything. Might pull it apart toomorrow and have a look and see if its something diabolical..............
If its not upside down and on fire, I'm not trying hard enough.......

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