Have done some welding on the TRS lower gearcase and
facing now some problems to turn the retainer nut in order to get the specified pre load setting (still having end play).

With the old load ring everything moved relative easy and I could reach the required preload but after installing a new load ring it seems almost impossible to press it down without damaging the already weakened thread of the gear housing.

Has anybody undergone similar experiences.

Does anyone know the characteristic curve (force over travel) ?

The new ring is 0,295 inch thick the old one 0,197 also the design has been changed, new ring # 67440T looks stronger.

Is it correct that the load ring shall make installation easier by achieving the designed preload within a wider range than solid shimming.

Thanks
Joee

They always used the load ring in the TRS drive. The new load ring shouldn't be any different than the old one except the old one is crushed. Are you sure the pinion height is correct? I have the shimming tools for the TRS if you're in the Jersey area.

Bowtie, thanks for your offer. Pinion height is correct

Yes the old ring is crushed to 0,197 inch, but this should be normal after installation.

New ring height is 0,295 inch and it should be compressed more or less to the old ones height to achieve the proper bearing preload.

My question is how much force can I expect to press it down.

Already using a 2 feet extension I´m afraid to damage the housing thread.

Joee

Finally put some cam & lifter installation lube on the retainer nut thread and pressed it down to the desired value.

Max. moment of thread friction lies in the vicinity of 200 ft lbs

Joee

I'm sure you know this but make sure you lube the retainer nut on both the threads and the face where it contacts the tab washer. 2' extension is OK, actually a little short, we use a 3'.

The force required to compress it is substantial, but this is what keeps the carrier from moving around. If you cheat and re-use the old one you will reach your pre load spec with very little (if any) pressure to hold the carrier.

Yes good lubrication was the trick.

Next time I will reuse the old load ring considering it as a solid shim, provided that the designed preload can be achieved. Joee