K

Kevan Chippindall-Higgin

Member

• Jan 9, 2016

• #1

I have two problems. The first is a slightly dragging OSR brake. It has a new caliper and hose yet the disc is still hotter than the other three. It is only mild, but it is affecting fuel consumption and killing pads.

Also, the servo seems to have a tiny capacity. Even varying the pedal pressure will quickly exhaust it. Brakes fine on rolling road and car stops straight although it feels a little sluggish.

 

jamesmartin

Well-Known Member

• Jan 9, 2016

• #2

if caliper pistons are easy to push back it might help to screw adjuster on end of servo rod in (clockwise), its worth checking all vac lines are good and not unplugged, also feel the vac on the line is it weak or strong

 

K

Kevan Chippindall-Higgin

Member

• Jan 9, 2016

• #3

The caliper is brand new. It has done under 500 miles and is still shiny! I will check the vacuum. The pipe seems sound, but one never knows. The one way valve works ok because it does not lose vacuum. How to I adjust the servo rod? Is it a matter of disconnecting it from the pedal and rotating it?

 

jamesmartin

Well-Known Member

• Jan 9, 2016

• #4

td5 has a few vac lines leading of main pipe, to adjust rod you need to pull master cylinder out of the way ,get someone to hold pedal down ,hold rod with some pliers and adjust rod is only lightly clipped into servo hence the pliers

 

K

Kevan Chippindall-Higgin

Member

• Jan 9, 2016

• #5

I will have a look at all of the lines tomorrow to check they are all sound. How far should I adjust the rod? I appreciate this is a bit of a length of string question, but are we looking at a quarter turn or a couple of turns? I just want to get a feel. No point over cooking it!

 

jamesmartin

Well-Known Member

• Jan 9, 2016

• #6

a couple of turns,if rod is too long brakes will gradually apply may take several miles depends on how long ,if too short pedal will be quite low before any braking really occurs

 

K

Kevan Chippindall-Higgin

Member

• Jan 9, 2016

• #7

It does rather sound like this rod. The pedal seems to have a bit too much travel for comfort although it has never failed an MoT on this but I would like it a bit better. It sounds like a bit too much enthusiasm will end up with all sorts of issues. A bit at a time methinks. Presumably I can pull the master cylinder off without undoing the brake lines. Bit of brute force?