help identifying crank part please

chatlow
chatlow Posts: 849
edited June 2014 in Workshop
Can't figure out what this large plastic spacer-looking piece is. It's part of brand new Sora Triple crankset but the spacer that goes on the right hand crank is already on there. This piece was sellotaped to the packet container the left crank arm.
I have already fitted the new crankset and all is running smoothly.

Any ideas?

ockm.jpg

edha.jpg

Comments

  • dj58
    dj58 Posts: 2,223
    It looks like spacer number 6 on the exploaded diagram?

    http://techdocs.shimano.com/media/techd ... 801177.pdf
  • chatlow
    chatlow Posts: 849
    DJ58 wrote:
    It looks like spacer number 6 on the exploaded diagram?

    http://techdocs.shimano.com/media/techd ... 801177.pdf

    Bugger, think you're right.. Reckon it's essential to use?! I've unfortunately rounded one of the crank arm bolts slightly so really don't want remove if possible!
  • dj58
    dj58 Posts: 2,223
    It must be included for a reason, maybe for clearance to stop the LH crank arm from contacting the BB cup and stop side thrust movement. Why not buy a couple of new (Clamp Bolt (M6 x 19) & Washer) and re-fit the crank arm. LBS should be able to supply them or an Engineer's supplier's.
  • keef66
    keef66 Posts: 13,123
    My 105 triple has the same spacer on the non drive side. Without it the crank will be too close to the BB and / or you won't have preloaded the bearings sufficiently. If you've rounded one of the bolts you'd be better off removing it and fitting a new one now. SJS probably have the Shimano originals in stock if you don't want to risk a random online purchase of something generic.

Categories