wateka
Well-known member
In my 853, the brake parts my prior owner got rid of or left on a shelf, finally came available on eBay, thanks to Skid Row Salvage. In putting the parts together I had to open my chaincase cover and found milky oil. I got the majority out with my shop vac, but to drain the rest, and do a wash down with diesel, I opened up the 3-bolt cover plate in the back to access the drain plug. When I did that, I was greeted with a nice wash of diesel.
Turn out I had a the leak where the bushing meets the tank (as opposed to leaking around the steel plug).
I pulled the steel plug and the bushing came out with it, so I was able to drain 20 gallons using an oil catch pan.
The bushing for the tank and for the chaincase are the same part number, 6553411. What was interesting after removing the chaincase plug/bushing, was the pliability difference between the two. The diesel bushing (right) was hard as a rock, and the chaincase bushing (left) was still squeezable, below.
I think I got these from alone of the online parts dealers (definitely not a Bobcat dealer) so the chemical composition of that supplier/batch may not be formulated for diesel? That’s the best answer I could come up with. I did check the holes to make sure they weren’t jagged.
Finallly, the steel plugs ( 6599645 ) were not easy to remove, given their location as well as the stiffness of the material. Since this may well happen again, I tack welded some 1/2-20 hex nuts on the end of the plugs to be able to have something to lever the plugs out next time. Vice grips worked the first time, but as you can see, tore the plugs up.
@brdgbldr I found your earlier post about draining the chaincase while birddogging my issue. For others in the future, below is both drain locations in one shot.
Turn out I had a the leak where the bushing meets the tank (as opposed to leaking around the steel plug).
I pulled the steel plug and the bushing came out with it, so I was able to drain 20 gallons using an oil catch pan.
The bushing for the tank and for the chaincase are the same part number, 6553411. What was interesting after removing the chaincase plug/bushing, was the pliability difference between the two. The diesel bushing (right) was hard as a rock, and the chaincase bushing (left) was still squeezable, below.
I think I got these from alone of the online parts dealers (definitely not a Bobcat dealer) so the chemical composition of that supplier/batch may not be formulated for diesel? That’s the best answer I could come up with. I did check the holes to make sure they weren’t jagged.
Finallly, the steel plugs ( 6599645 ) were not easy to remove, given their location as well as the stiffness of the material. Since this may well happen again, I tack welded some 1/2-20 hex nuts on the end of the plugs to be able to have something to lever the plugs out next time. Vice grips worked the first time, but as you can see, tore the plugs up.
@brdgbldr I found your earlier post about draining the chaincase while birddogging my issue. For others in the future, below is both drain locations in one shot.
