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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
McDougalator, no oil
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<blockquote data-quote="Nigel Spaxman" data-source="post: 88893" data-attributes="member: 2907"><p>Here are some pictures of how I added a filler neck and dipstick to my MacDougalator. I drilled a 3/8" hole at an angle. I made a tube from 3/8" stainless hydraulic tubing, .035 wall .062" wall might have been better. I drilled some holes in the side of the tube that would be inside the housing above the oil level. I threaded the top of the tube 3/8 NF. I welded on a little bracket to screw the tube onto the housing. I installed the tube using epoxy (JB Weld) and two 10-32 screws. I made a little knurled cap with a dipstick. The cap has a 1/16" hole as a breather. The dipstick is 1/4" aluminum. I had to mill a relief into the adapter used with the B case, and also in the dynamo clamp. I haven't ridden with this set up yet, but I think that the addition of the breather hole will reduce the leaks. Being able to check the level will provide peace of mind and also will enable me to avoid annual removal of the unit to check the oil level. It would have been easier to have enough clearance on a machine with a front and rear head instead of the two front heads my machine has. I filled the unit through the filler neck with a syringe 30ml as recommended by John MacDougal, then I marked the dipstick at that level by filing a notch. I don't think the level makes much difference as long as there is at least 10 ml. I think maybe John would have liked it.</p></blockquote><p></p>
[QUOTE="Nigel Spaxman, post: 88893, member: 2907"] Here are some pictures of how I added a filler neck and dipstick to my MacDougalator. I drilled a 3/8" hole at an angle. I made a tube from 3/8" stainless hydraulic tubing, .035 wall .062" wall might have been better. I drilled some holes in the side of the tube that would be inside the housing above the oil level. I threaded the top of the tube 3/8 NF. I welded on a little bracket to screw the tube onto the housing. I installed the tube using epoxy (JB Weld) and two 10-32 screws. I made a little knurled cap with a dipstick. The cap has a 1/16" hole as a breather. The dipstick is 1/4" aluminum. I had to mill a relief into the adapter used with the B case, and also in the dynamo clamp. I haven't ridden with this set up yet, but I think that the addition of the breather hole will reduce the leaks. Being able to check the level will provide peace of mind and also will enable me to avoid annual removal of the unit to check the oil level. It would have been easier to have enough clearance on a machine with a front and rear head instead of the two front heads my machine has. I filled the unit through the filler neck with a syringe 30ml as recommended by John MacDougal, then I marked the dipstick at that level by filing a notch. I don't think the level makes much difference as long as there is at least 10 ml. I think maybe John would have liked it. [/QUOTE]
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Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
McDougalator, no oil
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