Question about 2001 Triumph Triumph Bonneville

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1977 triumph 750 rear brake - no pressure but everything is new and bled well. Ideas?

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  • Murtaza Akberali  Versi
    Murtaza Akberali Versi May 11, 2010

    Do you get full pressure at the rear brake caliper bleeder?

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  • 948 Answers

Only two things cause no pressure. Air in the system or a leak. Pump your brake pedal fifty times. Do you see fluid coming out anywhere? Has your fluid level dropped in the master cylinder? If not, you have air in the system. If the conventional bleeding method isn't working try a vacuum bleeder.

Posted on Jun 27, 2009

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Posted on Jan 02, 2017

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2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


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Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
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I have changed the rear rotors and brake pads, bled the brakes after putting itall back together. Seemed to have brakes but then shortly thereafter they are like a sponge. Last time I tried bleeding them...


Hi, bleeding your rear brakes with engine running, you should get enough pressure out of the lines to squirt 3-4 feet. In other words, good pressure. If all you get is a trickle, you probably have a bad master cylinder. Just because its full of fluid, does not mean the seals arent shot. If you have bled them in order, left rear,right rear,left front,right fornt and have bled them enough to get fresh fluid out of each one without achieving good solid pressure at all wheels, replace your master cylinder. There is a proportioning valve, but usually it will affect only one wheel when going out, usually the left rear.
Brake pedal height comes from the rear brakes, so if you have bad pressure there, you will never get a good pedal. Eventually with a bad master, your brakes will go completly out..Mike

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I have no brake pressure. The rear calipers and master cylinder are new. There are no apparent leaks in the lines, and yet there is still no pressure in the brake system. The pedal just sinks to the floor....


the reson u get no pressure is that you need the special tool to bleed the ABS control hydraulic valve, u will need to have the dealer do this, air is trapped in the ABS control and until you bleed it correctly with the tool you will have no brake pressure.

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1 Answer

No brake power


faulty remanufactured master cylinder. always buy new.... i was trying to nsave some money and it cost me more in the long run

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