Just brought home a 1949 DC4 with little / no brakes. Pedals feel good, but little effect. Adjusters appeared to be all in. Pull rods are not original and end of 1 is badly bent but I don't think thats the whole problem. Pulled left side apart (right is behind belt pulley - will try to get to that one today).
Friction material is oiled/greased up badly - some evidence of grease on disc - but thickness outside is 0.164 and inside 0.181. (These are 8 inch OD, 5 inch ID friction material new 0.190 in thick ?) On further inspection, it may be that adjusters were not all in. Tried to clean friction material with lacquer thinner - did some good. Seal inboard appears to be new but may have oil seepage near top.
Plan is to clean up friction disc - maybe sand lightly - and reinstall and readjust. Hope is that oil seal is not leaking. BUT NEED at least 1, preferably both pull rods. Left side bent and right side is clevis that has been welded. Also missing return springs.
First question - need source for pull rods and return springs - believe P/N is either 07180AB or 4091AA for rod (or 08967AB ??) and springs 07138AB. Used rods would be fine.
Next question - is there any hope with cleaning up friction material problem or do I need to replace? And if replace what is best source of material - local clutch rebuilder did MM discs on my UB but they were not riveted.
Last question, if seal is leaking, how much trouble to change seal - looks like significant disassembly or is there an easy way to remove old seal?
Thanks in advance - this is my first DC
Friction material is oiled/greased up badly - some evidence of grease on disc - but thickness outside is 0.164 and inside 0.181. (These are 8 inch OD, 5 inch ID friction material new 0.190 in thick ?) On further inspection, it may be that adjusters were not all in. Tried to clean friction material with lacquer thinner - did some good. Seal inboard appears to be new but may have oil seepage near top.
Plan is to clean up friction disc - maybe sand lightly - and reinstall and readjust. Hope is that oil seal is not leaking. BUT NEED at least 1, preferably both pull rods. Left side bent and right side is clevis that has been welded. Also missing return springs.
First question - need source for pull rods and return springs - believe P/N is either 07180AB or 4091AA for rod (or 08967AB ??) and springs 07138AB. Used rods would be fine.
Next question - is there any hope with cleaning up friction material problem or do I need to replace? And if replace what is best source of material - local clutch rebuilder did MM discs on my UB but they were not riveted.
Last question, if seal is leaking, how much trouble to change seal - looks like significant disassembly or is there an easy way to remove old seal?
Thanks in advance - this is my first DC