1550 Front Wheel Seal

pcrh · Aug 17, 2019

Hi:

Working on a 1550 gas unit. The front wheel seal is toast but the bearing are ok. So now I need to get a seal. Part number I found is 163101A but no specs on size.

Can anyone confirm that I have the correct part number and can anyone give me the dimention of the seal. Outside diameter, inside diameter, thickness?

Thanks

J. Schwiebert · Aug 17, 2019

That is not a regular lip type seal. The face of the seal rubs on a replaceable retainer.

pcrh · Aug 17, 2019

Hi J. Schwiebert:

The information I have says that the seal is a Double Lip Seal. The parts book list a cup, seal, bearing for the outer hub.

Is this what you are refering to? Or is there somthing inside the hum I need to look at? This is for Wheatland axel tractor.

Thanks

Mike(NEOhio) · Aug 17, 2019

I got a set for mine from Maibach's. Replace the cup on the spindles, too. Not real expensive.

rrlund · Aug 18, 2019

There's a tin cup that goes over the spindle,then another cup with a thick rubber face on it that goes in the hub and rides against the cup on the spindle. It seals face to face,not internally on the spindle.

pcrh · Aug 18, 2019

Hi Mike:

Is this Maibach's from ohio? Did the set include the cup(s) J and rrlund are refering to?

Thanks

pcrh · Aug 18, 2019

Hi rrlund:

I went back today to look at the spindlle again. Since the seal is gone I am finding it hard to picture what you are refering to. Is their a cup behind the bearing (as in outside) on the spindle or are both cups you refer on the inside after the bearing?

Thanks

Mike(NEOhio) · Aug 19, 2019

Yes, in Ohio. Cups and seals are separate parts. My book shows K-737 seal and K-738 cup. The cup presses on to the spindle, kind of snaps on. Tap it down with a wood block so you don't damage the surface. The seal presses into the hub. IIRC the inner bearing can pass through the seal but check to be sure. You may have to put the bearing in the hub before the seal goes in. Put a thin coat of the bearing grease on the face of the seal before you put the hub on the spindle. Setting the wheel bearing nut is a little tricky. You're compressing the seal so it's hard to feel the point where the play is taken out of the bearings. My manual says to seat the bearings while turning the wheel, then back it off and take several tightening tries to find the point where the resistance just changes.

Mike(NEOhio) · Aug 19, 2019

Don't confuse "cup" with the wheel bearing cup, which is the outer race. This cup goes on the spindle up against the flange. You'll figure it out when you see the parts. Tell Maibach's what you have and they'll know what you need.

rrlund · Aug 19, 2019

Mike explained it to you. In the picture,18 is the seal,19 is the cup that drives on the spindle. There's a thick rubber backing on number 18. Like Mike said,it's a throw back that should have been thrown away. The Fleetline and Supers ran heavy oil in the hubs and it kept that seal lubricated. If you run grease in them,they don't get lubrication,dirt drops down the back side of the hubs and wears on them as well,then you have a seal that doesn't seal much at all. I wish somebody would have come up with an update kit for them.

pcrh · Aug 19, 2019

quote="rrlund"](reply to post at 06:43:50 08/19/19) [/quote]ttps://forumphotos.yesterdaystractors.com/photos/mvphoto41328.jpg[/img]

Here is a picture of the seal.

Thanks for your thoughts.

rrlund · Aug 19, 2019

And that's on a 1550? I never saw a set up like that. In the picture I posted,the spindle just goes through everything in order from right to left.

rrlund · Aug 19, 2019

Does that tractor have a single front wheel? That's the only place I'm finding anything even remotely close to what you have in that picture. From the part numbers and schematic on Agcopartsbooks dot com,they still use that same seal and cup set up as the other front ends and it takes two of each. One set on each side.

Mike(NEOhio) · Aug 19, 2019

That still looks like the same seal and cup. What are the part numbers for 2 and 3?

Mike(NEOhio) · Aug 19, 2019

Just checked my parts book again. Randy, he has the wheatland/industrial axle and that's the steering knuckle portion of the diagram. The part numbers are the same except they both have a "-A" suffix. Don't know what that means but looks like the cup goes against the spindle flange and the seal goes into the knuckle casting. Just opposite of the row crop axles. pcrh, where did you get that part number??

pcrh · Aug 19, 2019

Hi Mike, rrlund:

Yes unit has a solid front axel or wheatland axel.

Item 2 (cup) has part number K738A and item 3 (seal) has part number K737A. I was over at www.agcopartsbooks.com and found the picture rrlund has and it listed K737A with 163101A as an updated alternative. Not sure which book it was in, but that is what got me started. Now with book 436 for the wheatland axel I only see the K737A part number.

Thanks for your thoughts.

pcrh · Aug 19, 2019

Hi:

Found it, book 296 lists K737 seal qty 2 Seal - Alternate 163101-A (RC, UTY), and K738 cup qty 2.

So, as Mike said the wheatland and an "A" suffix but same rest of number.

Thanks

pcrh · Sep 2, 2019

After some calling around I found a place to bring in the seal. The seal they had listed was 163101A.

While waiting for the seal I took the spindle apart and found the cup refered to in other posts. When the seal came in I took the cup with me to check fit.

The seal sits loose in the cup. There is a 1/16 gap from the outside diameter of the seal to the inside diameter of the cup.

This does not seem right to me. Can anyone confirm?

pcrh · Sep 5, 2019

I finally got the dimentions for the seal with part number 163101A. It has and outside diameter for 3.788 inch. The Cup has a diameter of 4.012 inches. This leaves me a gap of almost 1/8 inches between the seal and the cup edge. How do i keep the seal aligned in the middle while assembling? I still think something is wrong with this setup.

pcrh · Jun 10, 2020

Hi:

Finally had time to get back to this. As posted earlier I ordered the part number listed for this spindle. The seal size is why I sent it back.

What I have done is take the right side apart. The seal on that side is way different.

It looks like a thick rubber ring. It is 3.9 inch outside diameter and 3.3 inside diameter .

It seals on the hub. Now I just need to find a number for the part.

Any thoughts?

Thanks

pcrh · Jun 11, 2020

Hi J:

Sorry, I did not include that information as it was part of the earlier comments.

Unit has a solid front axel or wheatland axel. I am looking for the left seal.

Because the left seal is missing the seal part I took apart the right knuckle and found the intact seal.

The right seal is from Ohio Rubber Company. The seal is labled ORCOTITE and has a Pat No 2264739. No other numbers visible. Seal is a one piece unit. That is cup and seal together.

Casting number on the knuckle is 159947A and a stamped in R for right side. Left side number for left side q59948A followed by stamped in L

Thanks for your thoughts

pcrh · Jun 11, 2020

Hi:

Here are some pictures of the seal I am looking for. Viewed from the right knuckle since it is intact.

This is the knuckle with the seal in place. Bearing race is behind the seal.

This is the seal out of the knuckle. Seal is 4.25 inch outside diameter and 3.33 inch inside diameter and the face of the seal (rubber part) is .58 inch.

A closer look at the part of the seal.

Back side of seal.

And Pat number on back of seal.

If it helps the number on the bearing race is 28521. Bearing is mounted on the spindle and spindle and bearing slide thru the seal so the bearing can mate with the race.

I looked on Maibach but could not find this size. Also the part number I found last fall 163101A from the www.agcopartsbooks.com book 296 is too small. I had a local tractor supply shop bring it in and it will never go over the bearing.

Hope someone can help.

Thanks

1550 Front Wheel Seal

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