andi4eyes Posted August 31, 2020 Share Posted August 31, 2020 Driving home from picking up my new to me Classic VX I lost a front brake caliper bolt.The second bolt was still there but quite loose already. So my 120 miles trip home was cut short after about 10 miles and ended on a recovery vehicle. After some research I found it's a 7/16 x 1-1/4 UNF bolt plus washer. In my case the washer on the bolt that I didn't loose seems to be an M12. I will replace that with a 7/16 once I get them.To my surprise there was a very thin washer between the caliper and upright, also about 7/16 (or 11mm) ID and about 1'' (or about 25mm) OD by 0.8mm (1/32?)I checked a build manual of the 1990s and couldn't find anything about that washer or shim.Trying to find that shim seems to be impossible, at least for me. I couldn't find a 11mm ID and about 25mm OD washer at all. What do people use in that place if anything at all? Maybe I'm just looking in the wrong place?Cheers Andi Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 31, 2020 Member Share Posted August 31, 2020 Private Message sent. Link to comment Share on other sites More sharing options...
ECR Posted August 31, 2020 Share Posted August 31, 2020 I seem to remember a special red washer being used when I built my 1990 seven. Does it exist in the Caterham store? Link to comment Share on other sites More sharing options...
andi4eyes Posted August 31, 2020 Author Share Posted August 31, 2020 Okay, the problem seems to be the missing dust shield.I just found a DIN washer that has a ID of 11mm and is 1mm wide. It doesn't have the large OD of the (presumably) imperial one but that should work I hope. Link to comment Share on other sites More sharing options...
Guy Lowe Posted August 31, 2020 Share Posted August 31, 2020 # 4Yes the shim replaces the dust shield so that the caliper is aligned correctly. Contract http://www.redlinecomponents.co.uk/ they will have them and the bolts Link to comment Share on other sites More sharing options...
Wrightpayne Posted August 31, 2020 Share Posted August 31, 2020 I think it would be prudent to do a nut and bolt check at the earliest opportunity. Link to comment Share on other sites More sharing options...
andi4eyes Posted September 1, 2020 Author Share Posted September 1, 2020 I called all the Caterham specialists I could find in my area and nobody has the parts in stock. So my next call will be to Redline at 10am when they open.@Wrightpayne: Yes you are absolutely right. Link to comment Share on other sites More sharing options...
andi4eyes Posted September 1, 2020 Author Share Posted September 1, 2020 As Guy Lowe had mentioned Redline had everything in stock. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted September 1, 2020 Share Posted September 1, 2020 It's just a shim washer most good engineering / nut & bolt suppliers will carry them, You can add or subtract to centralise the caliper over the disc, and square them up to as some of the machining on the uprights leaves a lot to be desired.The OE Triumph calipers are not that sensitive to being perfectly central as there is sufficient piston travel to accomadate this.The HiSpec are more sensitive to this as you can end up with a pad dragging as it cant retract enough. Link to comment Share on other sites More sharing options...
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