Brakes help please

[vestas]

Hi ALL

Today I changed my front brake pads, (most mechanical thing I have ever done!)Thats the beauty of TVR's they force you into it!

I followed the bible until it got to the bit about pushing the piston back in to get the pads to fit. I used a block of wood and wacked it to no avail.

I then used the bleed screw and with that undone I could easily push the piston back flush to fit the pads. Whas this the right thing to do, there is no mention of it in the bible.

I then retightened the bleed screw as the fluid was coming out and repeated the same on the opposite wheel. I now have no brakes! I cant see that any air got in as the fluid was coming out as I tightened the bleed screw. The reservoir is almost full still. Any advice for this novice!

[Ballistic Banana]

Not sure what the order is to bleed the brakes on a GRiff is it opposites?? and your meant to press the Brake pedal slowely and as the fuid comes out tighten the nipple otherwise you will have air somewhere.(of course this is with pads in)
And there is no pressure in there due to the pedal not pushing fluid through.

BB

BB

>> Edited by Ballistic Banana (moderator) on Thursday 29th May 22:23

[RichB]

How much fluid came out of the bleed nipple, and did you top up the reservoir before you applied your foot to the brake pedal? If not you may have drawn air into the master cylinder as the fluid level went down to replace that forced out by pushing the pistons back into the calipers. Rich...

[budd]

The best way to push back the piston is using some BIG!
pipe grips or two large screwdrivers as levers.If you've opened the bleed nipples you WILL need to bleed the brakes .

[shpub]

If the piston won't push back then there is something not right. A bit of leverage is needed but if the piston only went back with the nipple open, that is not normal. Might only be something like a sticky calliper as they are very prone to this indeed. Definitely worth cleaning the calliper with brake cleaner.

The problem is that opening the nipple to let the fluid out will introduce air into the system and so the whole brake system will need to be bled. Best way is with the Easibleed pressure system. Far far easier than pumping the pedal.

Steve
www.tvrbooks.co.uk