wtb: Set of 3-bolt 3406b cat jake brakes

Take yours off and fix them.

 

See if you can get the pins from an old 3406A non Jake motor. The one usually used in Graders. Grip them firmly with a Vice grip and knock them out with a hammer, or place them in a bench vice and tap them out. The stems on you rocker shaft also comes out with a bit of convincing. Just replace them with the solid one, no oil pressure issues, and Bob is your uncle. Did it plenty of times.

 

No not the hardware. The jakes oil is fed trough a pin on top of the rocker shaft. If you take the jakes of leave the pedestals which it bolts onto. No hardware Change. All you have to do is find the solid pins. I will get a pic for you so can get a better idea of whats going on underneath the jakes.

 

If you can see the pin on top of the rocker shaft, underneath the bolt that holds the rocker shaft, that's what youre looking for.

 

The jakes are only fed from the ones in front. There are 4 in total, 2 hollow, and 2 solid, with a motor with jakes. 4 in total for a motor with no jakes. No need to take the rocker shaft off to remove the hollow pin. It could be a bit difficult to get them out though. A Vice Grip works best. Your local CAT dealer should be able to look up the part nr for you. Just a note, no use swapping the front and rear pins. The rocker shaft is hollow i.e oil pressure front and rear of rocker shaft.