|
jdemaris
10-18-2003 08:12:52
|
|
Re: 1967 JD 350 Reverser Fluid Leak in reply to Wingnut, 10-17-2003 23:05:39
|
|
| |
Most of the time the reversers do leak from the front input shaft. This IS where the pump is, but the leak is usually caused by failed bearings inside the reverser. Thus, just pulling the engine and installing a new pump/shaft seal will not fix the problem. You'll be able to tell quite easily just by how loose the input shaft is. It should have a maximum endplay of .006". The reverser has a weak point which tends to fail, especially in the older units. Newer reversers, or updates for the older ones, get a larger bearing. Anyway, it goes like this. Input shaft in front rides on a fairly large adjustable Timken style bearing, then midway . . . inside the reverser, the input shaft joins the output shaft. At this point, there's a tiny little Timken style bearing. Units up to 350B, originally, have/had an inadequate sized bearing here. Then at the back of the reverser at the end of the output shaft, is another large Timken style bearing. Also, at the rear-outside of the reverser is an adjustable bearing quill that has a shim pack in it. So, adjustment is made with the reverser case removed from the crawler. Again, to sum this up, there are two shafts, inline, and three bearing assemblies. 99% of the time, it's the little center bearing that fails. When it goes the whole deal gets loose and the front pump seal blows oil out. If you pull the engine, and the shaft is not excessively loose, you CAN just put a new seal in the front pump, which requires only pulling the engine. This is rarely the case, though.
|
|
|
