Plunger frame driveshaft
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Stephen Ascherl
Plunger frame driveshaft
How does the R51/2 driveshaft differ from the R51/3? Are they interchangable? Is the Mobile Tradition/Huggett new production driveshaft assembly an exact duplicate of OEM?
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Gerry Douglas-Sherwood
Re: Plunger frame driveshaft
This is an interesting one Stephen.
The BMW parts list shows the R51/2 shaft as No.30 38 026 and the R51/3 as No.30 38 027
The difference might be at the pinion end where a felt seal is listed for the /2 and a lip seal for the /3, therefore the sealing surface might be of slightly different diameter between the two. The illustrations are no help as both look identical but I guess a /3 would fit a /2 with a suitable modification to the sealing arrangement.
The BMW parts list shows the R51/2 shaft as No.30 38 026 and the R51/3 as No.30 38 027
The difference might be at the pinion end where a felt seal is listed for the /2 and a lip seal for the /3, therefore the sealing surface might be of slightly different diameter between the two. The illustrations are no help as both look identical but I guess a /3 would fit a /2 with a suitable modification to the sealing arrangement.
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Ron Long
Re: Plunger frame driveshaft
Stephen,
One difference between the two is where the white rubber dust cover rides on the driveshaft. The R51/3 has a recess machined in the shaft the dust cover sits in. This prevents the dust cover from moving forward on the driveshaft. The R51/2 driveshaft does not have a recess. I think they may be the same except for this one difference.
One difference between the two is where the white rubber dust cover rides on the driveshaft. The R51/3 has a recess machined in the shaft the dust cover sits in. This prevents the dust cover from moving forward on the driveshaft. The R51/2 driveshaft does not have a recess. I think they may be the same except for this one difference.