cs-m737-1 8 speed cassette spacer question

[Mookie]

I'm trying to install an old cs-m737-1 cassette on an fh-m900 hub and am finding the cassette to be too loose even after torquing it down. The hub still has the proper spacer on it, but I'm wondering if I'm maybe missing a spacer of some sort for the cassette? There's already a paper thin spacer on the locknut but that's it.

Thanks!

 

[fiendish feet]

Yeah i own two 737 cassettes one pictured here has a intigrated spacer ...
My other cassette it was missing and i had to pop a couple of spacers on freehub ...
I will measure the spacer later ..

 

[Mookie]

forgot to show the backside:

 

[FluffyChicken]

You'll need the spacer, mainly as you're fitting a Compact Drive cassette to a standard freehub on the 900.
It cannot cope with the 11T so needs a thin spacer, often the one fitted as shown in these later IG styled cassettes (M737-I), earlier you just had to find something.
If you do manage to clamp it down without one you may find the freehub crack near the threads... <whistles> but to be fair that freehub still work nicely, since way back in 1993/4 I tried....

 

[Mookie]

Thanks! any idea of the thickness or a part number I should order? Seems like it would be less than 1 mm just based on the small amount of wiggle, or would a generic 1 mm spacer work?

 

[FluffyChicken]

1mm probably work, I've certainly not used anything thick, maybe thinner even.
just enough + a touch to make sure.

If you have any 'modern' HT2 or other thin Bottom Bracket spacers, you can use them.

the sort of thing Aliexpress is good for, grab a 1mm, 1.5mm, 2mm etc, ebay do similar but probably ships from China. it might be cheaper though.