OK, now I am going to open up the range shift/final drive gearbox,
starting with the rockshaft cylinder housing.
After I got all the bolts out, I needed my forklift to get the housing off
the gearbox...it must weight 100lb or so. I plan to completely disassemble
the cyinder, rate-of-drop valve, and position control valve later. The first
thing to do after the top is off is remove the range shift shaft. The shaft is
easily broken off due to the weakness of an O-ring groove
cut into it. Mine
is broken as expected. There is a
TBN thread posted about this problem
and a well-documented repair....a quick search did not find it. Maybe
someone can post the link here and give credit to the poster?
The 2nd photo shows removing the shifter fork so the shaft can be pushed
out the side of the case. I am using a drift to pound out the roll pin while
I hold a magnet underneath. If the roll pin falls into the sump, it will be
hard to remove. The final photo shows the shaft coming out, and the now
removed shifter fork. The tire has to come off to get this shaft out.