Posted by Owen Aaland on February 21, 2010 at 18:32:24 from (207.13.114.47):
In Reply to: 706 brakes posted by chrisinsoky on February 21, 2010 at 16:17:03:
ratnickwi said: (quoted from post at 20:17:03 02/21/10) OK so I posted the other day about a squeaking rear end. Well I pulled the clutch side brakes off to find them loaded full of rust and dirt..not much salvageable in there. I know there is oil in the axle housing just below the fill/check plug. Then I pulled the brake pedal side brake housing off only to have oil come running out. Now my question is, would that axle carrier have been off previously and had holes been put in between there and the rear housing to make that one big cavity. Just curious why one side & not the other.
It is a normal procedure to drill holes in the main frame to allow the oil in the axle housing to mix with the oil in the rear frame. If I understand you correctly, you removed the brake housing, not the axle housing, and oil came out. That is not an unusual event either but it means that the housing has not been drilled. The normal oil level in the rear frame is half covering the PTO drive shaft, well below the brake housings.
Originally the 06 series has separate oil reservoirs for the axle housings and the rear frame. If they have not been updated with the holes it is possible for the inner brake pinion seal to leak oil into the axle housing. When that happens the axle housing will fill to the level of the brake pinion. I believe that is what you are describing.
The preferred repair is to remove the axle housing. Drill two holes in the lower portion of the rear frame. Remove the plug by the inner axle bearing. Remove the inner brake pinion seal. Cut the head off of the level check plug to indicate that that side of the housing has been updated.
As long as oil is not entering the brake assembly or leaking out the axle, the simple work around is to occasionally drain some oil out of the level check plug. There is a vent between the axle reservoir and the rear frame so even if the housing were to become completely filled with oil it would not build pressure in the axle housing.
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