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View Full Version : BRAKES!!!! Load Sensing Valve



89GQ
1st October 2010, 12:41 PM
Im'e going from drum to disk on the GQ, Do i need to get a load sensing valve thingymajig that the spring on the top of the diff goes to off a Disk rear model? or are they the same??? Cheers.

YNOT
2nd October 2010, 09:34 PM
They are probably the same, maybe Nizzbits could tell us if the part numbers for the load sensing bias valves are the same?

Tony

89GQ
2nd October 2010, 09:57 PM
Cheers Tony, Will give him a call. Im'e abit confused? Done the kits on the calipers (just all the rubbers) Both were pretty clean, the pistons only had a couple of raised rust/gunk marks,Cleaned everything in de-greaser washed off, blew dry with air and washed in metho and air dried again. Cleaned up bore and pistons with 800 wet and dry, installed o-ring etc with rubber grease and then wiped brake fluid over bore , piston etc.Lined up one and it popped in by hand, still tight but could moove it in and out with plenty of persuation by hand, It wasnt easy to moove but it would, , the other one done all the above but could only get it in with a clamp on a flat bar on the end of the piston and had to moove it out again with air, its just tooo tight, From memory when doing the front they went together easy they shouldn't be forced should they?, after a clean and new o-ring?

YNOT
2nd October 2010, 10:04 PM
Sometimes they do need a bit of force to push the pistons in, but too much force could indicate the main seal is not sitting correctly on the piston.

Tony

89GQ
2nd October 2010, 10:39 PM
Sometimes they do need a bit of force to push the pistons in, but too much force could indicate the main seal is not sitting correctly on the piston.

TonyYeh checked that out a couple of times, blew the pistom back out and its sitting properly,Bit scared to put that one on incase it sticks, Have filled them with a bit of fluid and stood them so fluid goes down to the o-ring end and will see if its still tight in a day or so.Cheers.