Marks Holt 75

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dnalot

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While waiting for material for the water pump I have been making the water manifolds. I started by turning the flanges on the lathe. From there I moved them to my cnc router and cut the flanges to shape. After that I drilled the screw holes in the flanges. And the last step was using the mill to cut the relief for the ferrule.

I used a high temp silver solder paste for mounting the ferrule to the flange. This was my first time using a paste, I think it will be my go-to for small parts from now on. I made a sheet metal shield to protect the engine while I soldered the assembly together. I drilled through the flange assembly into the tube as the last step.

To complete the cooling system I still need to build the water pump. I have bearings, some o-rings for the belt drive and a bit of aluminum on order.

Mark T

flange.jpg

flange drill.jpg

flange mill.jpg

flange solder.jpg
flange soldering.jpg

water manifold.jpg
water manifold 2.jpg
 

kuhncw

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Nice work. Your soldering heat shield is an interesting idea.

Chuck
 

kvom

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Nice job on the soldering.
 

dnalot

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With this post the cooling system is completed. I deviated from the plan a little in that the fan support legs were meant to be cut from a single piece of material. I didn't have a suitable piece of aluminum that size so I made my legs in two pieces and modified the bearing housing to accommodate that change. I also made the legs a bit heaver because I plan to mount the fuel tank to the fan support structure. The fan pulleys are a bit larger to accommodate the o-rings I had on hand.

For those following along and leaving a comment I thank you.

Next I will be starting the fuel system . Its summer here and I am not spending much time in the shop. The novelty of nice weather will soon wear off and I will get back to it.

Mark T

BRG housing.jpg


fan BRG housing.jpg


BRG support legs1.jpg


BRG support legs2.jpg


BRG support legs3.jpg


fan.jpg


Fan top.jpg


Fan mounted.jpg
 

dnalot

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OMG, you are from the "Soviet"! I grew up in Yelm, went to high school at Toutle Lake! Am now in Moses Lake
I don't know what you mean by the Soviet. Moses Lake, now that is a bleak place. What are you doing there, watching the 737 Max planes arrive for storage. A few years back I owned a 200 acre wild life preserve in the Moses Coulee. A nice place for rattle snakes to thrive. Every summer I hosted students from a variety of Collages to study snakes, badgers, bats and other critters. Sold the place to the "Nature Preserve", it was a sad day.

Mark T
 

Richard Hed

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I don't know what you mean by the Soviet. Moses Lake, now that is a bleak place. What are you doing there, watching the 737 Max planes arrive for storage. A few years back I owned a 200 acre wild life preserve in the Moses Coulee. A nice place for rattle snakes to thrive. Every summer I hosted students from a variety of Collages to study snakes, badgers, bats and other critters. Sold the place to the "Nature Preserve", it was a sad day.

Mark T
Washington is so liberal that it must be a soviet. don't gets me wrong--I too am a liberal but just not one who believes in velvet gloved stalinism.
 
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