8n loader help

[DougieD]

Thats the 194354 shaft.

TOH

I got the new drive shaft, and it's VERY tight. Can't get it in without a hammer. I still have the old one, and it slides in nicely, but a couple of the splines are a little beat up. So my questions today are 1) should the drive shaft be that tight, or should it easily slide in and out of the hub, and 2) is there something I can do to loosen it slightly? TIAFAH.

DD

 

[TheOldHokie]

I got the new drive shaft, and it's VERY tight. Can't get it in without a hammer. I still have the old one, and it slides in nicely, but a couple of the splines are a little beat up. So my questions today are 1) should the drive shaft be that tight, or should it easily slide in and out of the hub, and 2) is there something I can do to loosen it slightly? TIAFAH.

DD

It should be a slip fit. How did you get it apart again?

TOH

 

[DougieD]

It should be a slip fit. How did you get it apart again?

TOH

Drove it out from the other side with a punch.

BTW, I put the tube part of the hanging bracket into the hole, and it is stuck fast in there! Used a sledge to get it in. I'm gonna hit it in a few spots with a stick weld, but even without that, I don't think it's going anywhere.

 

[Non-farmer]

For any others - all shop production is paused while I recuperate from major surgerg (double lung transplant). Hope to have some things back in production "soon".

And here I am, being nickel and dimed to death by arthritis.

You're a better man than I am, Gunga Din.

All the best to you.

 

[TheOldHokie]

Drove it out from the other side with a punch.

BTW, I put the tube part of the hanging bracket into the hole, and it is stuck fast in there! Used a sledge to get it in. I'm gonna hit it in a few spots with a stick weld, but even without that, I don't think it's going anywhere.

The hole is laser cut - you need to deburr it.
The underside of the tube should be fully welded to the hanger.

I would not mess with the fit on the splined shaft - tight is better than loose.

TOH

 

[DougieD]

Thats the 194354 shaft.

TOH

I've tried inserting my new drive shaft into the pulley; it goes in, but not very far - maybe 3/4", whereas the old one goes in about twice that. Is there a preferred way to shave a little off the diameter of the lands or grooves to get in farther? I'm going to put a vernier caliper on the old and new ones to see how the measurements compare.

 

[DougieD]

I've tried inserting my new drive shaft into the pulley; it goes in, but not very far - maybe 3/4", whereas the old one goes in about twice that. Is there a preferred way to shave a little off the diameter of the lands or grooves to get in farther? I'm going to put a vernier caliper on the old and new ones to see how the measurements compare.

Oops. I see I've already asked about this. Been a while.

 

[TheOldHokie]

I've tried inserting my new drive shaft into the pulley; it goes in, but not very far - maybe 3/4", whereas the old one goes in about twice that. Is there a preferred way to shave a little off the diameter of the lands or grooves to get in farther? I'm going to put a vernier caliper on the old and new ones to see how the measurements compare.

They are called splines. In this case SAE parallel splines.

I think you will find the shaft is already bottoming out.on the crankshaft bolt. Grinding down the splines wiil only reduce engagement and make thinks worse.

TOH

 

[DougieD]

I did some measuring, and closer looking. It seems the new shaft is actually slightly SMALLER than the old - at least at the widest and narrowest points - about 19mm vs 19.5mm OD, and 16.7mm vs 17.5mm at the narrow part.

It does look like with the new shaft, the splines are reaching to just a couple mm shy of fitting all the way through the pulley hub, so I guess there's enough purchase there. The old one pushes through another 3/4" or so, but is only grabbing air beyond the hub.

When the new shaft is in as far as it'll go, it measures 12.5" from the protruding center of the pulley hub to the end of the shaft, whereas the same measurement on the old shaft is 11.5". Will this 1-inch difference have to be compensated for somewhere when I attach everything? Am I gonna need some spacers or something?

 

[TheOldHokie]

I did some measuring, and closer looking. It seems the new shaft is actually slightly SMALLER than the old - at least at the widest and narrowest points - about 19mm vs 19.5mm OD, and 16.7mm vs 17.5mm at the narrow part.

It does look like with the new shaft, the splines are reaching to just a couple mm shy of fitting all the way through the pulley hub, so I guess there's enough purchase there. The old one pushes through another 3/4" or so, but is only grabbing air beyond the hub.

When the new shaft is in as far as it'll go, it measures 12.5" from the protruding center of the pulley hub to the end of the shaft, whereas the same measurement on the old shaft is 11.5". Will this 1-inch difference have to be compensated for somewhere when I attach everything? Am I gonna need some spacers or something?

This is not a Mars lander. Irs a simple 1940's era piece of farm equipnent.

The pump is typically mounted on a.bracket that can be adjusted to the proper spacing. The details vary by loader model.

TOH

 

[DougieD]

This is not a Mars lander. Irs a simple 1940's era piece of farm equipnent.

The pump is typically mounted on a.bracket that can be adjusted to the proper spacing. The details vary by loader model.

TOH

Oh, it's NOT a Mars lander! See, I thought it was - Front End Lander. I need to get new glasses.

 

[TheOldHokie]

Oh, it's NOT a Mars lander! See, I thought it was - Front End Lander. I need to get new glasses.

Whatever it is quit obsessing over unimportant minutiae. Bolt it up and move on.