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MF 40 Industrial brakes

M

MKinON

Member
Time to do the brakes on our MF40 loader. Started with the right side. Separating the carrier plate from the axle was long and slow. It fought me the whole way. I think it was the reaction pin that was
tight after all the years. Is the reaction pin, shown right in the pic below, pressed into the axle housing, or should it be free enough to come out of it's socket. I had to disassemble the actuator to get it
out because it hung up on the reaction pin when trying to take it out as a unit. Reassembly would be a lot easier with that pin out of the way. It is currently solid in it's mounting. My sense is it's meant
to come out for brake servicing but just seized after decades in there. Is this correct? If not, did I miss some trick to getting the actuator out as a unit?
 
Try the pics again.




cvphoto9868.jpg


cvphoto9869.jpg
 
I don't think the pin needs to come out at all. With the shaft splines and clean discs is what's important. The early small disc brakes the actuator set on a lug cast into the axle. If I recall the PIVOT housing needs to come off, then the actuator has more room to move around and lift out as an assembly after the first disc is removed.
 
Thankyou Dieseltech. Not sure I understand what you mean by pivot assembly. If it's the actuator housing on the outside or the brake rod, those were both off. I did get that reaction pin out yesterday in course of cleaning things up. It wobbled a bit with the tap of a hammer, so more penetrating oil and lots of tapping and heaving pulling with vise grips attached and finally it gave. Just a bit on the rusty side. Initially, it was the lugs on the actuator where the pins are for the links that were just too wide to clear the edge of their compartment without room to turn more within the confines of the axle housing lugs and the reaction pin. It's pretty tight tolerances within those 3 fixed points. Now to try and get the outboard brake surface cleaned up. I guess that crud on the inside was just all spent brake disk material. There sure was a lot. The bottom was packed so full there was no way anything could move much. I had to drive the 2nd disk off with a heavy hammer it was so badly rusted to the axle.
 
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