G: Gearbox (Twin) Third gear pinion G12 free play

TouringGodet

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I have about 59 thou clearance for G12, between the locating washers G19 and G20/2. Should I add shims? If so, how much?
 

greg brillus

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Are you sure the G 4 shaft is fully home against the bearing race........that amount of end float seems excessive. Check the G 20 washer is 56 thou thick, give or take.
 

TouringGodet

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I measured the free play while holding the G19 hard against its boss on the G4 by hand, and then using a feeler gauge between the gear and G19, using the feeler gauge to push the G12 gear towards the G20/2 and its boss on the G4. Both the G19 and G20/2 are new from Maughan. I’ll measure the G20/2 later.
 
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