Disc Brake Help

finaticfishing

Recruit
Joined
Feb 14, 2011
Messages
3
Tie Down Disk Brakes. model 6600 I think. About 18 months old. Hub temps @ 200 F in stop and go traffic. Brakes work excellent. Things I've done/noticed. Calipers are clean and move by hand when disconnected from hydraulics. It is very difficult to move the calipers with a c-clamp to back off, after the brakes have been applied. If I apply the brakes, it is difficult for me to move the rotors by hand. If I back them off with a C-clamp, they need a shake to get them to back off the rotor contact point. It seems the caliper slide pins have alot of play in them. Maybe causing the lockup. I have lubricated the slide pins, no help. Seems to me there may be pressure in the lines still when the brakes are released. Really kinda stumped by this now. Does the master cylinder actually suck back on the lines and disegage the brakes/calipers? Is there adjustment for this? Brakes have been bled all the way through to fresh fluid. Is there anyway to check proper function of a master cylinder? It certainly puts them on very well, just does seem to back them off enough. I have also backed the castle nuts off 1 face to see if that helps. Heard that here before.
Please help, any long distance trips are out till repaired.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
17,072
Re: Disc Brake Help

Disc brakes "drag" by design. 200F (93C) in stop and go traffic is very good. Nothing wrong with your brakes.

Its not uncommon to see disc operating temps in the 500-700C (900-1300F) range
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,796
Re: Disc Brake Help

Your master cylinder is one designed for disc brakes right?

Which discs do you have...stainless or the vented type?
 

finaticfishing

Recruit
Joined
Feb 14, 2011
Messages
3
Re: Disc Brake Help

Yes, master cylinder has the checkvalve removed and is stamped for use with disc brakes only. It was a kit when installed. Discs are the vented rotor type, not stainless steel.
 

gozierdt

Petty Officer 1st Class
Joined
Jun 13, 2010
Messages
364
Re: Disc Brake Help

I tend to agree with dingbat. 200F isn't a really high temp in stop-n-go traffic. Disk brakes are designed
to have the pads ride very close to the disk, rubbing a bit. I don't see what your problem is? Can you
move the trailer by hand after you disconnect the TV? If so, I think you don't have a problem.
 
Top