non engineer type being confused.. - BMW Luxury Touring Community
 
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post #1 of 4 Old Jul 23rd, 2014, 8:33 pm Thread Starter
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non engineer type being confused..

I have been posting lately about my adventures in final drive failures and successes....Thank you Bennett very much for the rebuilt drive! Today I took the old drive and pulled the bearing off the crown gear, prolly shoulda got pictures of that. I put the gear in a metal bowl of ice, and heated the bearing with my propane torch, used a couple of flat bars, and popped that sucker right off. Anyway, enough of the braggadocio (sp?). The reason for my post is that I measured the shims for the bearing, and it looks to me like they are a .2mm and a .9mm. I looked on line at the A&S cycles BMW OEM catalog, and the shims are listed in sizes like 0,400mm or 1,200mm...Not sure how the Germans do it, but here in 'merica, I'd call that 4 hundred and 12 hundred millimeters. Do they actually mean .4mm and 1.2mm? I mean that would make sense right? if you put a 1200mm shim in there, the drive would be sticking out past your sidecar...Aaaaanyway, from the post I have hunted down, it would seem that 1.1mm of shim seems a little excessive, in Charley Vt's video, the drive he rebuilds used a .40mm shim. Guess I'll take a trip to Harbor freight and get a dial micrometer and a stand and try shimming it myself..I mean if it was overshimmed by .50, it still lasted 43K miles...how badly could I screw it up? Don't answer that!

RICH CANNON
2000 K1200LT "a great ride"
2002 GL1800 powerful, but boring..(gone)
1979 XS1100 (gone)
1986 VT500 Ascot (gone)
1972 Honda 500-4 (gone)
1961 Lambretta (way gone)
1962 Allstate Compact (gone but not forgotten)
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post #2 of 4 Old Jul 23rd, 2014, 8:56 pm
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Re: non engineer type being confused..

It's common for european locales to use comma in place of decimal point, and vice versa.

thus 0,400 mm = 0.4 mm and 1,200 mm = 1.2 mm.

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post #3 of 4 Old Jul 23rd, 2014, 10:48 pm
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Re: non engineer type being confused..

Rule of thumb for my "field repair" where you don't measure at all: If there is a thick and a thin shim then throw away the thin one and just replace the thick. But it is always better to measure.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #4 of 4 Old Jul 24th, 2014, 3:16 am Thread Starter
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Re: non engineer type being confused..

Thanks you guys, like I said, harbor freight for a dial micrometer and a stand, I'm gonna give it a whack...I don't guess I could mess it up any worse than BMW

RICH CANNON
2000 K1200LT "a great ride"
2002 GL1800 powerful, but boring..(gone)
1979 XS1100 (gone)
1986 VT500 Ascot (gone)
1972 Honda 500-4 (gone)
1961 Lambretta (way gone)
1962 Allstate Compact (gone but not forgotten)
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