JBRoberts Posted October 26, 2013 Report Share Posted October 26, 2013 Folks: I added a remote brake servo as part of my rebuild. I've bled the brakes 2 times and the pedal still goes down to the floor quite a bit. Is there a special method to bleed brakes if you have a servo installed ? Many thanks, JB Quote Link to post Share on other sites
mike3md Posted October 27, 2013 Report Share Posted October 27, 2013 JB, If you are sure you have fitted the cylinder seals the right way round, and have no leaks, try taking the servo out of the circuit and see if you still have a problem. I do not believe there is any special procedure for bleeding with a servo. Mike Quote Link to post Share on other sites
Ade-TR4 Posted October 28, 2013 Report Share Posted October 28, 2013 Have you bled the servo too? (Sorry if this is a dumb question!) Ade Quote Link to post Share on other sites
JBRoberts Posted October 28, 2013 Author Report Share Posted October 28, 2013 Ade No I did not..another dumb question is... How do I bleed servo ? Thanks JB Quote Link to post Share on other sites
peejay4A Posted October 28, 2013 Report Share Posted October 28, 2013 Not sure I know how to bleed a servo as such, there's no bleed nipple. I fitted a servo during my rebuild and there's no special bleed technique required. It took me ages to get a firm pedal though and one procedure which helped was suggested by Stuart. Get the system bled as well as you can then jam the brake pedal hard down with a broom handle or somesuch and leave it for as long as you can. As I was busy doing other stuff I left it for several days. One final whizz around the bleed nipples and I got a firm pedal. Quote Link to post Share on other sites
AlfredHitchcock Posted October 28, 2013 Report Share Posted October 28, 2013 Have you mounted the servo pointing up at an angle? I believe thats supposed to help with air bleeding. Quote Link to post Share on other sites
JBRoberts Posted October 28, 2013 Author Report Share Posted October 28, 2013 Tks for all your replies. I do have the servo pointing slightly upward. I did some Googling and some folks say to bleed the servo, you crack the outlet fitting and continue to bleed it until fluid comes out of servo outlet fitting, tighten it up and continue bleeding brakes as normal I'm not sure if this is right or not ??? Thanks JB Quote Link to post Share on other sites
peejay4A Posted October 28, 2013 Report Share Posted October 28, 2013 I wouldn't risk getting fluid on the paint personally. Quote Link to post Share on other sites
bob-menhennett Posted October 29, 2013 Report Share Posted October 29, 2013 It's the way I bled my Servo when I first got mine back on the road. Just go over board withbrake fluid precautions if it's non silicone, kitchen roll paper, rags, garden spray bottle full of meths, etc.Crack open the union with a helper keeping the pressure on the brakes.As soon as you see fluid weeping from the joint.... tighten up. Good luck with it and safe driving. Bob Quote Link to post Share on other sites
Badfrog Posted October 29, 2013 Report Share Posted October 29, 2013 Hi, The mounting angles of a hydrovac are very important to respect: main body angle to absolute horizontality: 39°angle of the air valve in relation with the main body : 135° from center top. The air valve is below the main body of the unit. If this is OK, the hydrovac does noy impede brake bleeding. Badfrog Quote Link to post Share on other sites
Ade-TR4 Posted October 30, 2013 Report Share Posted October 30, 2013 Crack the union as described: My mot-a-vac has a separate bleed-nipple on the servo, not sure which manufacturers included one and which didn't! Good luck - It can take a few goes to shift all the air from the system, but well worth persevering! Cheers Adey Quote Link to post Share on other sites
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