- Hodgson Part 077, Oil Pump Housing
- Hodgson Parts 079-083, Oil Pump Gears & Shafts
Many of the gears used in this engine need to be re-bored to a larger shaft size. There are drawings in the plans for holding fixtures to do this, but I found it easier just to use standard collets. This should also do a better job of maintaining concentricity between the bore and the gear O.D.
First the gear is placed in the collet.
To drill the roll pin holes in the gears, I made a short stub arbor on the end of a piece of 3/8″ drill rod. I indicated the center of the drill rod diameter and the center of the gear width, and drilled a 1/16″ hole through the arbor stub.
A gear was then placed on the stub, and a center chucked in the spindle. The center was lowered into a tooth root, and a jack bolt and nut were used to press the gear securely against the shoulder of the stub arbor.
- Pin Gears to Shafts
- Assemble In Pump
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