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Plunger rear suspension unit disassembly
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Plunger rear suspension unit disassembly
I'm trying to disassemble the rear suspension units from my 1954 R25/3 - I've managed after a bit of a struggle to remove the shaft from the units but I'm struggling to remove the black lower covers and spings - on at least one I need to replace the bushings for the shaft
I've got a copy of the 25/2 workshop manual and it states: "through drilled hole of spring covering tube catch spring by means of pin spanner Matra no 284 and turn spring off bearing plunger cast with the housing cover plate"
But I can't see a hole on either of the black lower tubes on mine - that tool I think should be 58/62 pin spanner - but that size looks wrong for that housing even if there were a hole
Is the 25/3 different from 25/2 in this area?
Any ideas?
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Re: Plunger rear suspension unit disassembly
Re: Plunger rear suspension unit disassembly
Re: Plunger rear suspension unit disassembly
Please update more images. I'm stuck here.hutchinson5234 wrote: ↑Sun Oct 22, 2023 11:09 amI have a '51 R25 in the shop for renovation..I'll take some pictures of the plunger stackcoreball tomorrow and post here.
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- Posts: 44
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Re: Plunger rear suspension unit disassembly
Let me know if you want more detailed pics
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Re: Plunger rear suspension unit disassembly
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Re: Plunger rear suspension unit disassembly
What I did find is that as well as the bushings being very worn I'm missing one of the rubber bump stops - item 19 in this diagram - https://www.bmwclassicmotorcycles.com/p ... -r25-r253/
I'm struggling to find replacements - Does anyone one know where I can get them from? - I think the part number is 33 53 3 054 124
- vechorik1373
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Re: Plunger rear suspension unit disassembly
#16 pertinax bushing x 4 part # 33 53 3 054 312
#17 bump stop x 2 part # 33 53 3 054 215
# 18 shim x 2 part # 33 53 3 054 217
#19 wave washer x 2 part # 33 53 3 054 218
#15 lower spring cover x 2 part # 33 53 3 054 236
#27 spring x 2 part # 33 53 3 054 027
#20 lower grease cover x 2 part # 33 53 3 054 234
Mark Huggett GMBH has them all in stock.
Technical Adviser, Former owner, Bench Mark Works
662 312 2838 cell 9 am to 4pm CST PLEASE!
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Re: Plunger rear suspension unit disassembly
Many thanks for the quick response - and the pointer to another parts supplier - that one hadn't turned up in my Google search!
Looking at the Haggett pages part 19 - the wave washer isn't listed for the R25/3 (but is for R25) is that a mistake on their site - Do you recommend installing it on my 25/3?
Thanks again
Richard