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55allis 
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Joined: 30 Jun 2020
Location: Griswold Iowa
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 Topic: RC clutch pack fit b125
Posted: 04 Jun 2025 at 11:12pm |
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Got a b125 power unit on a 60A combine and was wondering what engine and clutch parts would interchange with a RC?
Have a fellow member who has a nos RC clutch disk and pack and wondering if it would work on my b125?
He also has an overhaul kit for a RC but pretty sure that will work.
Thanks,
Gavin
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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DrAllis
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Joined: 12 Sep 2009
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Posted: Yesterday at 6:28am |
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An "RC" actually had a "C" engine, not a "B", so it is a little more HP. The flywheel is larger in diameter to meet the starter, so I assume the clutch and pressure plate are different too.
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PaulB
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Location: Rocky Ridge Md
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Posted: Yesterday at 7:03am |
 DrAllis wrote:
An "RC" actually had a "C" engine, not a "B", so it is a little more HP. The flywheel is larger in diameter to meet the starter, so I assume the clutch and pressure plate are different too. |
Funny that when an RC tractor was built, the model C did not exist. The engine used for the RC tractor (R code block) was a BE type block (which at that time was 116 CID) that was punched out to 125 CID, which at the beginning of the Model C production became the CE block that was now standard issue for all the B & C tractors. AS for the RC clutch disc, it has the 1-1/4" diameter WC center splines and is smaller than a WC disc , but larger in diameter than the B/C/P-U disc and is a unique part only used in the RC tractor. The RC flywheel is also a unique item that was only used in the RC tractor.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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DrAllis
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Posted: Yesterday at 7:16am |
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I should have been more accurate. The 1939 RC had what was to essentially become the "C" engine introduced in 1940. The 125 cube version of A-C's small block engine.
Edited by DrAllis - Yesterday at 8:46am
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55allis
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Location: Griswold Iowa
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Posted: Yesterday at 9:14am |
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So the late RC would be the same?
I think my b125 is a later one…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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55allis
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Posted: 8 hours 6 minutes ago at 8:54am |
  Here is the RC one… The part number on the tag comes up as a for a C….
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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PaulB
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Posted: 2 hours 38 minutes ago at 2:22pm |
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Is that number 70216965? the parts book shows that number to be a Rockford pressure plate not the Auburn pressure you have pictured. What is the diameter of the driving surface?
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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