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Old 09-02-19, 08:19 PM   #1
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Default brake problem

Hi. The brake pedal on my 2004 1.9d expert seems to travel a long way before brakes engage, With the engine off the pedal is hard with no creep however with the engine started the pedal travels 3/4 way to floor before brakes operate . Have bled the whole system the old fashioned way (two man job)and had new pads fitted but still the same. Has anyone found a cure for this seemingly common problem?
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Old 10-02-19, 07:29 PM   #2
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have you looked at the back brakes?. Are they adjusted properly?.
If you keep gentle pressure on the brake pedal (with the engine running) does the pedal creep to the floor?. If it does the master cylinder is bad.

Roger.
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Old 10-02-19, 07:43 PM   #3
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Hi. Will fit new master and new shoes on Tuesday provided I can find out what type to buy as apparently there are three different types. Took rear drum off yesterday and shoes seemed ok no leaks from cylinder and all pivots greased.Drums were quite tight to remove so I think the self adjusters are working.
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Old 11-02-19, 05:36 PM   #4
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Does the pedal creep then?.
If it doesn't a new master cylinder won't fix it.

If you are replacing it, check if your motor factor has all three in stock, if so simply take the old one to them to compare.

Roger.
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Old 11-02-19, 08:00 PM   #5
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Just got in from a 12 hr shift so will test pedal in morning. Was hoping to find out what type of brakes are on the van without taking them off, as garage door does not close with van inside. Any sites where I could enter vin number and obtain this type of info? Alan.
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Old 11-02-19, 08:19 PM   #6
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Quote:
Originally Posted by tesco tig View Post
Just got in from a 12 hr shift so will test pedal in morning. Was hoping to find out what type of brakes are on the van without taking them off, as garage door does not close with van inside. Any sites where I could enter vin number and obtain this type of info? Alan.
Yea servicebox,register and make up garage name they don't check

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Old 11-02-19, 08:28 PM   #7
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Good call TREM1. will set it up in morning.
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Old 12-02-19, 12:07 PM   #8
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Right heres the latest news on the brake saga. Applied firm pressure to pedal whilst engine off,had good solid brake pressure kept pedal depressed and started engine. No change good constant pressure.Released pressure. Applied pressure again with engine still running and pedal creeps 3/4 way to floor before any brake pressure? Went on the gov site and viewed the mot history and discovered that it had failed its last mot on a seized brake compensator valve. So crawled under this morning and discovered that the compensator has not been replaced it looks like the original valve fitted maybe just freed up with wd40 could this cause these symptoms.
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Old 12-02-19, 07:54 PM   #9
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Quite simply, no.
Freeing off a seized compensator is quite a normal practice.
The compensator restrict brake fluid flow to the back brakes, but pedal travel won't vary, the whole system will be full of air free brake fluid at all times.

Just a thought, I remember on a Renault 16 (many years ago ), with the rear suspension hanging no brake fluid got past the compensator. I had to move the compensator to simulate a load before I could bleed the back brakes properly.

Roger.
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Old 14-02-19, 01:58 PM   #10
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Another update. Just fitted new shoes and wheel cylinders, bled the brakes out with 2 litres of fluid, not one sign of air, Nice pedal right up near top and realy firm. start the engine and pedal goes 3/4 to floor, so pulled valve from servo and tested brake,Nice firm pedal and up near the top,put finger over pipe from vaccum pump and plenty of suction. Put pipe back into servo and pedal goes 3/4 to floor. Dodgy servo.Alan.
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