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55HT4 
Bronze Level
Joined: 17 Sep 2024
Location: Maine
Points: 5
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 Topic: 545 Loader Transmisson help
Posted: 17 Sep 2024 at 2:55pm |
Im looking at a 545 thats priced right local to me. The biggest issue it has is it has a leak in the transmission, bad enough that the current owner says it fills the bellhousing instantly upon starting. Does anyone more familiar with this trans know of a seal that would cause that, and the availability of finding one? Thanks
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Eric B
Orange Level
Joined: 09 Feb 2012
Location: British Columbi
Points: 953
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Posted: 17 Sep 2024 at 11:06pm |
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I have never worked on one of those transmissions but I anticipate the design to be much like other set-ups with converters having a seal where it goes into the transmission. A new seal would not be difficult to locate. The labor, however, to fix a leak to do with the converter is simply very intensive in the terms of time as you have to either pull the engine or the transmission to address the leak. Someone on this forum that may have worked on such issues, may well give you more detail. The 545 is a great machine, I have had the FR12 which is identical, just a few years newer.
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8244
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Posted: 18 Sep 2024 at 11:01am |
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It's an Allison trans. I bought a service manual for my 545B trans. It's more than a little intimidating. Mine has a bearing missing It's spacer on the top shaft that drives the charge pump and hyd pump. It may not be so cheap in the end.....
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55HT4
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Joined: 17 Sep 2024
Location: Maine
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Posted: 24 Sep 2024 at 5:05pm |
I know they have allison transmissions, and from everything I've seen they are a daunting thing to break into, from the sounds of it it wouldn't need to be pulled apart, just detached from the engine for a seal. After some more research I saw some hints that these loaders may have a wet bellhousing, and a seal around the bellhousing and around the starter pinion. Does anyone know for sure on this? Thanks Josh
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 26 Sep 2024 at 9:37am |
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My 78 model has dry bellhousing.
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55HT4
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Joined: 17 Sep 2024
Location: Maine
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Posted: 10 Oct 2024 at 4:54pm |
I ended up buying the loader, too good of a deal to pass up. The issue ended up being a failed torque convertor bearing causing the convertor to wear through on the seal. I've found a new convertor, but I'm wondering what the best way to flush as much aluminum grit out of the trans as possible. My thought was a diesel flush. Will this damage anything in the transmission? Thanks josh
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