450 track Adjsuter seals

Ordered the 8 dollar seal kit from amazon. The seal on the shaft fit nicely but the metal seal doesnt fit the female yoke that slides onto the shaft.
Upon inspection there isnt a metal seal to replace on this yoke(Front Idler) but instead has plastic or rubber seals that fit into the grooves(2 I think). Does anyone have the JD part number or even better Aftermarket info on where to get the proper seals?

Please post your complete serial number as there are some differences, and not having the metal wiper seal doesn't sound just right.

What specific machine? Is it a 450, 450B, 450C, or newer? The original adjuster seals on the first 450s were unreliable and are often updraded. Just a small black rubber seal on the adjuster piston.

Cant find any serial number. Looked all over machine and even called salvage places for help but no luck. This machine in older plain 450. I also own a
450 C and know where the serial plate is located on it but its not there on this machine. There is no plate under the operators cab on either side also. Im
stumped. That being said, I have removed the idler and the female end of it has a rubber seal that fits in a groove about an inch from the end. On the male
piece that slides into this female yoke is also a rubber seal. This seal has a flare to it in the forward end. I bought a seal kit from Amazon and this
particular rubber seal fit into the groove but the metal outer seal is too large to fit into the female idler yoke. I do not have the history of this
machine alhough I bought it from a friend who owned it for many years and used it to clean up his land.

This may narrow the possibilities since they are not all the same, as you now know. The straight 450s and 450Bs up to serial number 142199 had the serial number tag on the front of the seat panel, below the seat where it would be behind your right calf when you are setting in the seat. 450B serial number 142200 and after had the tag on the front panel of the battery box, like your 450C should have. There should be two holes in one location, or the other, where the tag was riveted on, which should help to start to narrow down what it is. I have heard some 350s had numbers stamped in the right rear top of the transmission case. One number was the pinion centerline depth and the other was the six digit serial number. Likely not there but it won't hurt to check.

Here are 3 drawings, which looks most like yours? #12 is a quad ring or a u-cup depending on serial number and 3 is not used after 450B serial number 140454.

Thank you Jim, This Helps greatly. I think you are right in that it is the #12 seal, and if you know the part # or seal kit # I would go ahead and try to get one, However let me share my suspicians of this track adjuster. Your diagrams show the three track adjuster yokes along with the male stems that slide into them. Two of the male stems have grooves for the sealing/pushing ring to fit onto the shaft. The other has a strait shaft no groove. Each corresponding yoke has its seals or internal seals. I have to point out that the idler yoke is different on mine in that the two holes where the grease fittings/plug are not as diagramed in your post. The holes in this idler are not a single hole and not two side by side holes. They are lined up one in front of the other with the forward hole being on the flat surface, the rear on the raised hump. My suspician is that this idle has been changed and is possibly a Case but Im not sure? I have pics in my phone but dont know how to load for this computer. If you can email me your cell number I can send for uou to look or post?

Did you find the rivet holes for the serial number tag in one of the locations I posted?

Can you find any casting numbers or markings on the yoke? Those could help ID it.

I do not see an email for you in either modern or classic views. I changed the setting on my email so you should be able to see or get it. You can email your pictures to that email address. Nothing against you but I don't give out my cell number for things like this.

Thank you. The Serial plate was under the drivers right leg covered with dirt. It reads as best as I can see
T5F3C 083506 or 083505 or 083606 with an F at the end? The plate is worn badly where the serial is.

The idler has 3 holes in it in a triagle pattern on both sides of the machine so I mistakenly thought this one was changed. Obviously it hasnt been. They match and are probably original.

Also inside the female yoke next to the rubber seal I need is a metal snap ring. So the Kit or pieces should be 3 in number. 1. the inside rubber seal. 2. The metal snap ring laying next to the rubber seal. 3. an outer metal dust seal that measures OD 2 3/4 inches as best as I can measure with a ruler to fit a 2 inch diameter rod.

Again much thanks!

(quoted from post at 13:13:08 03/17/20) Thank you. The Serial plate was under the drivers right leg covered with dirt. It reads as best as I can see
T5F3C 083506 or 083505 or 083606 with an F at the end? The plate is worn badly where the serial is.

The idler has 3 holes in it in a triagle pattern on both sides of the machine so I mistakenly thought this one was changed. Obviously it hasnt been. They match and are probably original.

Also inside the female yoke next to the rubber seal I need is a metal snap ring. So the Kit or pieces should be 3 in number. 1. the inside rubber seal. 2. The metal snap ring laying next to the rubber seal. 3. an outer metal dust seal that measures OD 2 3/4 inches as best as I can measure with a ruler to fit a 2 inch diameter rod.

Again much thanks!

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The letter at the end should be a T. the serial number breaks down as follows:

SN = serial number
T = Tractor
5 = JD450
E = Crawler dozer
3 = Diesel
C = Transmission (collar shift)

Serial number: 083505 (or 6) (This number falls in the 1969 build range using the serial number list on the jdcrawlers site)

T= (Build location) John Deere Dubuque Works

This serial number is a 1969 straight 450 crawler dozer with a diesel engine and sliding gear transmission with a reverser.

Here is a link to the on line parts catalog so you can look for part numbers. (The blades were a separate catalogs at that time)

https://partscatalog.deere.com/jdrc/navigation/equipment/64777

Recieved 3 individual parts from jd dealership today. Parts # T19094,T37660,AT13014. Two of the seals T37660, AT13014 are the same as in the Amazon 905000 seal kit. Interestingly enough the JD dealership third seal (T19094) looks in size the same as what I removed from the female idler end with the exception that there were 2 of these seals against a steel split ring. I dont and havnt seen in any diagram 2 of these rings side by side? Amazon offers a kit 905002 and its picure shows the split ring and one ring which appears in size like the jd T19094. I have ordered it and it is on the way. If anyone remembers how the seals fit into the female idler housing please let me know? I am baffled?

Along the lines of JDEM's post; someone may have tried modifying yours for better sealing. That could explain why nothing matches the parts diagrams, Do you see any casting number on the yoke? Your JD dealer might be able to check on parts that one needs using the casting number.

If I'm reading the parts catalog right yours should use T37660 (poly U-cup) 1 each and 1 each AT13014 (oil seal) (those are the part numbers for 450 serial number 064135 and above). 450 serial number 064134 and prior serial numbers used T19014 (Quad ring), T23894 (Backup ring washer), and T23893 which now subs to AT13014 (Oil seal).

You could try taking it to a hydraulic shop and see if they can match some seals up to just what you took out, if you want.

Thank you. Could you tell me what is meant by "Quad Ring"? What is this and what or how many does it consist of?

(quoted from post at 22:29:18 03/19/20) Thank you. Could you tell me what is meant by "Quad Ring"? What is this and what or how many does it consist of?

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A Quad ring has a round OD and ID, like an O-ring, but has a cross section with four lobes instead of just being a solid round. Like O-rings, they are individual rings.

Thank you, So Quad refers to the number of Lobes not the number of individual rings used to seal the piston? This machine had 2 simular to these next to the steel split ring in the groove of the female idler yoke?

As I posted the other day; someone may have done something different than the book shows because I don't find any using two Quad-rings with a split ring between them. If you can find a casing number your JD dealer should be able to confirm which part number it is and that will define the seals needed (provided it hasn't been modified). The service department might be able to find out if there were any related service bulletins.

In studying the seal dimensions I see on line the Quad-ring T19094 has a .210 section and 1.975" Which makes the OD approximately 2.395". The U-cup T37660 has an ID of 1.715", OD is 2.415", and is .500" thick. Two Quad-rings and the split ring are about .500" total I'm estimating; so the U-cup will fill that space. The ODs to the Quad-rings and the U-cup fall in line. The IDs look off however (could be a misprint in one of them, you will have to check the IDs of both), It looks like the Quad-rings would be for a 2" shaft and the U-cup looks like a 1-3/4" shaft. Of course there are no dimensions shown for the shaft. Will the poly U-cup fit your shaft (piston)? If so I would try using the one poly U-cup instead of the Quad-rings and spacer. From the parts catalog it looks like several things had to change if certain parts were replaced. Maybe someone replaced some, but not all they should have. Shaft diameter and yoke casting number maybe something your dealer can figure out to get part numbers, if the one poly U-cup won't work.