In Reply to: how to hold lift pin when tighting to 150 lbs. posted by clair bell on December 07, 2018 at 18:06:04:
If you are referring to the lift arm to axle trumpet connections, they are fastened via tapered pins and castle nuts that have to be accessed from inside the center housing. The pin, p/n 8N-563, is tapered, fits into the center housing snugly, and gets secured inside with a 5/8-18 castle nut and cotter pin. The bad news is that many times because of wear and tear on the lift/arms over time, the tapered holes on the housing become wallowed out. If they become real bad, they will no longer pull the tapered pin in firmly. You can access one side via the LH side inspection cover on the center housing but the other side, the RH side, requires the LH axle trumpet and the differential drive to be removed entirely. You cannot reach the pins simply by removing the top cover either. It is not a tough job/project, but very time consuming as removal of several parts is required. the LINK below from our archives is a reply from Bruce(VA) on pin repair. Here is a scan of the 8N lift arms and related parts -
8N HYDRAULIC LIFT LINKS & RELATED PARTS:
Also, from the NTC Archives, long time member SOUNDGUY posted this on how to get the lift pin, 8N-563, tight without removing axle trumpet, but, it only works on one side:
“I was in a time pinch on that one…have to set the socket wrench extension and socket and ratchet into the sump one at a time, reach in with nippers and cut the cotter pin and remove…use a pipe wrench and pipe on the trumpet pin in a way that you can use yer foot to stand on the pipe…between the socket wrench, hold in and you standing on pipe…you get her snugged up, and then probe around with the cotter pin to see if you have it lined up correctly… if not, tighten 1/16" more and try again… and try again…once you get it…stab it in and bend it over.”
LH TRUMPET REMOVED, DIFFERENTIAL DRIVE REMOVED, 8N-563 PIN ASSEMBLY SHOWN AT 7 O’CLOCK POSITION ON RH AXLE TRUMPET:
Hope this helps you. FWIW, you can always go to our ARCHIVES forum and plug in a keyword or topic and get old posts on the subject. Most, if not all, topics have been discussed here at one time or another and there is surely some information you may find useful from them.