For years I had looked into buying a granite surface plate but the shipping charges always killed the deal. Then a few years ago, a supplier sent me a notice of an 8 hour flash sale that included free shipping on anything but their largest equipment (some dimensional restrictions applied but there were no weight restrictions in the ad).Working on buttoning up the bottom end. One of the parts is the rear main seal housing that holds the felt seals. This is one area that I think IH came up a little short on the engineering side. It seems like this part was an afterthought and I'm not the first person to say this. The housing is made out of cast aluminum that is really thin in areas. A lot of warpage and pockets when I ran a dial indicator across the gasket surfaces. No way am I going to try and machine this so down to the surface plate with an eighty grit sanding disc to level it out. Worked it until my shoulder gave out but I am satisfied that it will seal.
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There are two grease fittings. One is for the fan hub bearings and if you over grease them the grease would just go by the seals and to the outside. IOW, no harm except the mess. The other grease fitting goes to the bushings that the impeller shaft runs on which is independent from the fan hub. It is driven by a 'lathe dog thingy' attached to the fan hub. There is a packing that seals the coolant from leaking. If you over grease this fitting it will introduce grease to the cooling system by the impeller. Good question!Nice work. Is the grease fitting to actually get grease to the bearing or to keep water from the bearing?
Again never cease to amazeMade some miscellaneous parts for the water pump. New caps for the grease fittings out of brass. These grease fittings don't have the little check ball in them. This is to allow grease to escape rather than go into the cooling system. Next is a lock bolt for the driver for the impeller shaft. Then I finished with two new drive studs for the impeller shaft. Made those out of tool steel. Will assemble the water pump tomorrow.
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