Straight 450 main clutch, 11 or 12?

captdill · Post by **captdill** » Wed Aug 21, 2013 6:37 pm

Help

I have the main clutch removed on my JD 450 (no letter) crawler. The release bearing managed to grind and melt the three fingers on the pressure plate. I was thinking that it was because I did not grease the bearing, but now not so sure. Several sources tell me that I should have a 11" clutch plate, but it is definitely 12". All parts seemed pretty new, probably installed just before I bought it. I Googled it and found a picture of my pressure plate, an exact replica, but marketed as a steering clutch plate Part number AT18416.

http://www.ebay.com/itm/AT18416-John-De ... 35b2cea299

So what is going on? Did the previous owner use a steering clutch for the main clutch? (Am surprised that it fit). My clutch plate is also 12". I would like to get by without buying a new plate, the most expensive part.

They sell a 12" disk, part number A-AT315827; so what is the correct pressure plate for that?

Can I switch back to an 11" pressure plate and clutch?

oljoe · Post by **oljoe** » Thu Aug 22, 2013 3:53 pm

The John Deere parts site http://jdpc.deere.com/jdpc/servlet/com. ... ervlet_Alt
lists 2 different engine clutches. One doesn’t specify the size. The other is 279MM (11in).
If you need parts Lavoy, the owner of this site, can help.
Joe

Tigerhaze · Post by **Tigerhaze** » Thu Aug 22, 2013 5:26 pm

Captdill-

When you look at the JD Parts website, Part number AT18416 is a steering clutch plate. There are a number of clutch and pressure plate part numbers for the 450 depending on whether you have the constant mesh transmission or HLR transmission, and then some substitution part numbers within those part listings. I didn't see the A-AT315827 part number you listed in a record search.

Since we don't know what part supplier has been giving you these numbers and where they are getting them from, I would recommend checking with Lavoy and give him your 450's serial number as well as transmission type so he can help sort this out for you.

captdill · Post by **captdill** » Fri Aug 23, 2013 6:15 am

Thanks,
I tried to call two places that are in the business and each went to message with no return call. I did speak to the local Deere dealer and learned exactly what you said Oljoe, that there were two types, 11 inch and unspecified. Mine was twelve inch so I was left with a bit of uncertainty. Meanwhile I have found part number AT29610 which fits the description.
My next question is about the release bearing. obviously it was designed to be greased, but there is a sealed bearing available. Is that better?

I hope to get the chance to call Lavoy, I doubt he would appreciate it at this hour.

Post by **Lavoy** » Fri Aug 23, 2013 8:29 am

Readily available, $189 + freight.
Lavoy

jtrichard · Post by **jtrichard** » Fri Aug 23, 2013 11:37 am

i see two different clutches one is 11" and is for the HLR trans. and the other is ??? for size and is for the constant mesh which trans do you have? as for the throw out just use the standard one and "Grease" !! it as you are suppose to .... it still has a hose on it??

captdill · Post by **captdill** » Fri Aug 23, 2013 11:51 am

I have made contact with Lavoy. We have concluded that I must have the constant mesh simply because a 12" came out of it. If I don't even know what kind of transmission I have, you expect me to know to grease the throw-out bearing? Thanks to all for a happy conclusion. This machine has been great fun for two years. I pulled a lot of root balls, planted a few, and moved my front yard to my back yard. But now I must bid it adieu once I get it back together, Already have it sold to a neighbor in need. Will miss it.

captdill · Post by **captdill** » Fri Aug 23, 2013 12:29 pm

... and yes, the hose and grease fitting was right where it should have been. Who knew?

Tigerhaze · Post by **Tigerhaze** » Fri Aug 23, 2013 2:01 pm

Captdill-

I believe your serial number data plate (if still intact) would allow you to confirm which transmission you have. It should be similar to "T5C3MxxxxxxT". The third digit could vary depending on whether a bare crawler/dozer/loader and the fourth digit could be a "1" instead of "3" if your crawler is gas instead of diesel.

The fifth digit ("M" in my example) is the one that tells you your tansmission- if a "M" then you have the HLR transmission and if a "C" then you have the constant mesh transmision.

Just to round out, the next six digits are the serial number (so you can identify year and submodel) and the "T" at the end is the manufatcuring plant (T is for JD Dubuque Tractor Works).

captdill · Post by **captdill** » Fri Aug 23, 2013 2:13 pm

You guys give me too much credit. I have never found the data plate.

jtrichard · Post by **jtrichard** » Fri Aug 23, 2013 3:51 pm

does it have any trans pressure and temp gauges? if it has JD temp and press gauges then it would be HLR not constant mesh ....yours has a hoe is it loader also?on 2010 ALL loaders had HLR if it is HLR then the clutch does not get used near as much...

captdill · Post by **captdill** » Fri Aug 23, 2013 5:58 pm

I think it's a constant mesh. Never mind that it has those gears, high, low and reverse. There are no such gauges. Not a loader, 6 way blade with backhoe.

jtrichard · Post by **jtrichard** » Fri Aug 23, 2013 8:53 pm

the constant mesh has high,low and reverse also ...but you have to use the clutch every time (such a pain)

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Straight 450 main clutch, 11 or 12?

Straight 450 main clutch, 11 or 12?

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