Hi,
Took off the right caliper to investigate pulling to the left when breaking. Inbound break pad was hard to remove, the caliper really needs cleaning out of baked break dust and grime, pads not sliding well. I'll clean it out and grind the edges of the pads a little and grease them, should help with that.
However...
I noticed only one of the pistons was out beyond the face of the caliper (sticking out at all). One of the outbound ones.
Put a bit off wood in the middle and pumped brakes.
Only one piston came out. The one that was slightly out.
Clamped that piston in with a g-clamp and left it clamped up. Pumped the breaks more.
Other outbound piston came out with one of the inbound ones having moved a bit.
wound that one back in, pumped brakes and it came out easier. Clamped that one in and kept it clamped.
Three pistons clamped in and a bit of pumping later the last inbound piston moved.
Removed all clamps, wood in the middle and made some poor sod pump the breaks while I watched caliper.
All pistons now come out but at different rates. The two outbound first then the two inbound move with one being faster than the other.
The dust boots look fine and I can see no corrosion or pitting on the exposed end of the pistons if I lift the boot rubber. No brake fluid leaking. Dustboots look fine.
Is this normal, do they just need cleaning or lubing?
Checked price of rebuild kits and pistons, to make these they must have to hunt down and kill Unicorns!!
Cheers,
Iain.