TRS Pinion Gear Shim Question

[b0mbtrack]

I'm trying to measure what I need for the pinion gear to be shimmed correctly. I'm using the correct tool that the book says 91-67441. The tool goes into the gear housing where the bearing carrier goes and you put a feeler gauge between the tool and the pinion gear and you have to get it at .025".
For anyone who has experience doing this here is my question. The book shows the tool directly under the pinion gear, however when i put the tool into the gear housing there is no way for it to be directly under the pinion gear as the tool can't go into the housing far enough. The tool is about an inch away from the gear. Is this normal? I guess i can still get a reading i'm just not sure how accurate that can be since the fealer gauge can have a chance to bend. Let me know please, thanks in advance......

 

[Don S]

Re: TRS Pinion Gear Shim Question

The edge of the measuring surface on the tool has to be under the gear, there is no way in the world you can measure the gap if it's an inch away.
Are you sure the tool is up against the ridge in the housing that the carrier goes up against?

 

[b0mbtrack]

Re: TRS Pinion Gear Shim Question

Thank you Don for the quick reply and yes you are right, the tool isn't going in far enough. When the tool gets past the exhaust hole it gets really tight for some reason and doesn't want to go in any more. Because of that i thought it was in all the way but it still has quit a bit to go. Tomorrow i will check that the tool's surface is clean and double check that i am putting it in perfectly straight. Thanks again.

 

[Don S]

Re: TRS Pinion Gear Shim Question

Corrosion and dirt (old sealers etc.) on the inside of the housing, are the normal reason they don't go all the way in. Being crooked will also cause problems. Warm gauge, and cold housing will make it really hard to get in place.

 

[b0mbtrack]

Re: TRS Pinion Gear Shim Question

the housing is brand new, however like you say the gauge is probably warmer than the case as it was in a heated area and i didn't even think of that. I'll throw the tool in the fridge for a while tomorrow and maybe put a space heater under the gear case. That will definatly help.
thanks again.

 

[Don S]

Re: TRS Pinion Gear Shim Question

That will help put the tool in the drive, how you planning on getting it back out?

Leave them together overnight at the same temperature.

 

[b0mbtrack]

Re: TRS Pinion Gear Shim Question

It worked to get them at different temperatures, the tool went right in. I'll leave them over night before i check shimming measurements when they are both at normal temps. Thanks Don.

 

[b0mbtrack]

Re: TRS Pinion Gear Shim Question

ok i made it a bit further on the drive, i am doing the prop shaft rolling torque but can't get the bearing carrier nut tight enough to crush the load ring. The book says not to use the old load ring so i put in a new one, but after about 140'lbs or so i'm still not able to crush it at all. out of curiosity i put in the original load ring and was able to get a good rolling torque reading. How many foot pounds does it usually take to crush the new load ring?