M109 Self propelled gun info needed

[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?

[rob love]

M109 is a steering wheel. There is a lock for the brake pedal for parking purposes.

I'll dig out illustrations showing the brake and steering systems tomorrow.

[jdmcm]

Thanks Rob!

[David Herbert]

The output shaft flanges shown in Rob's post #12 do not look compatible with the transmission shown in John's photo in post #11. The flanges in the drawing look as if they have a rather smaller internal spline than the larger external spline that would be needed to plug into the transmission in the photo. Am I missing something ?

I have an idea which could be completely wrong that M107 / M110 SPGs and M578 ARV have a very similar power pack to the M109. If so could John's photo be of one of those ?

David