have 7.5" S Disk setup with Mintex 1144
Under heavy breaking the car tends to steer to the right suggesting I may have a problem with the LHS calliper.
I checked it over the other week, removed the outer pad and pressed the pedal to push the piston out which took more force than I would expect. (inner was fine) So I gave it a liberal coating of WD40 and then pushed it back in, repeated this several times and by the time I was finished it took little pedal force to push the piston out. Jobs a goodun I thought.
Took the car out last night to check and its still pulling to the left under heavy breaking 
Just to add, all ball joints been done, new tie bars and rubbers, to and bottom arm bushes all good, shockers are new and tyres had 28psi each side.
So I can only assume I have not done enough to free off the sticky piston. So I am now thinking about removing the calliper, splitting and taking the piston out and making sure all is clean and ok.
Any thoughts about anything else I should be aware of and pitfalls to stripping the calliper gratefully accepted :)
