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Mills 1.3 Mk1 Series2 Back plate Removal

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Old 08-30-2018, 06:37 PM
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sw74gls
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Default Mills 1.3 Mk1 Series2 Back plate Removal

Hi guys, could you please give me some advice on how to remove the back plate on a Original Mills 1.3 Mk1 Series2 ? What tool I should fabricate etc Really appreciate your advice, Many thanks Simon.
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Old 08-31-2018, 12:01 AM
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Originally Posted by sw74gls View Post
Hi guys, could you please give me some advice on how to remove the back plate on a Original Mills 1.3 Mk1 Series2 ? What tool I should fabricate etc Really appreciate your advice, Many thanks Simon.
I can't get to my genuine Mills 1.3 till tomorrow, but my Irvine version needs a pin spanner, with two 1/16" pins spaced 9/16". Undo counter clockwise. You'll possibly have to remove the tank/venturie/NVA before the backplate. Simply loosen the nut closest to the engine cylinder first, and screw the whole thing off CCW. Does that make sense?

Are there two shallow holes in the backplate of yours?

Last edited by qazimoto; 08-31-2018 at 12:48 AM.
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Old 08-31-2018, 10:54 PM
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I've found my genuine Mills 1.3. I'm not sure what version it is, but the serial is 33-708. The engine was "restored" by a club mate who has treated the corroded Magnesium Alloy (?) crankcase. The first pic shows a "Pin" spanner. It's for a East European diesel and is a different shape but it shows the general idea. The backplate has three shallow holes each inline with 1/8" clearance. The two outer holes are 1/2" between centres.

Last edited by qazimoto; 09-01-2018 at 04:39 PM. Reason: Edit: After some reading I've come to the conclusion that my Mills 1.3 doesn't have the Mg alloy crankcase.
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Old 08-31-2018, 11:07 PM
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You could make a suitable Pin Spanner using a 1/2" x 1/4" Steel (or Aluminium Alloy) strip and an 1/8" drill. Just make two holes on 1/2" centres towards one end down the central axis and tap two short pieces of 1/8" Piano wire into them. Otherwise cut two short pieces of the 1/8" drill shank off with a Dremel, and insert them. CA them in place and insert into the two outer holes. The length of the strip will control the leverage.

Last edited by qazimoto; 08-31-2018 at 11:12 PM.
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Old 09-11-2018, 08:07 PM
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Thank you very much Guys I gain 95% of my knowledge from asking you questions, your help is greatly appreciated!! Many Thanks Simon.
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