M109 Self propelled gun info needed

[rob love]

John
Here is a cut and paste from a online manual. Basically it's a pair of ujoints with a small center shaft that fits between the two flanges.

[David Herbert]

A T55 / 62 has a spur geared first stage in the final drives which then drives into an epicyclic seccond stage so the input shaft from the transmission turns the OPPOSITE way to the sprockets.

If a M109 has a purely epicyclic or a two stage spur geared final drive the input shaft will turn the same way as the sprocket and problem solved.

David

[jdmcm]

Thanks Rob, that's a great start...and David you might have just solved the other question! I will get a picture of the output on the Allison and then maybe we could figure out what is missing, I sure do appreciate the help

John

[David Herbert]

John,
There are double UJs like that in some heavy construction plant. The challenge would be the fit to the transmission. The actual UJs will be standard commercial parts.

David

[jdmcm]

Exactly...its the splined part of the U-joint assembly that slides into the transmission I need to identify...

IMG_20171004_142024_hdr_LI.jpg

if I had this part of the U-joint holder for both sides I could fabricate the rest

[rob love]

John

You are looking for flange(s) 2520-00-818-0510. Shown as item 10 in photo below. The ujoint associated with that flange is (I believe) a 5-6128X.

[jdmcm]

That's exactly what I need...now to find somewhere to buy two that isn't an ITAR regulated vendor...there must be a civilian application to this somewhere...I imagine all the M109's that got cut up and these parts just hitting the scrap bin...frustrating! Rob would you have anything that showed how the steering and shifting was accomplished? I know they are both by cable, as well as the service brake pedal. Does the M109 have tiller bars or a steering yoke, my guess it is a steering yoke with a push/pull cable that activates the brakes on either side depending on which way you are pushing?