1919 Eaton Restoration – Part 2 of 3

Making governor weights, a latch arm and muffler for the Eaton from scratch.

| April/May 2017

  • 1919 1 hp T. Eaton Co. engine
    Photo by Peter Rooke
  • Machining rod to form governor weight ends.
    Photo by Peter Rooke
  • The roughly milled weights. The two eights were fabricated from one piece of rod.
    Photo by Peter Rooke
  • Using the lathe to shape the weight body.
    Photo by Peter Rooke
  • The weight body with center line cut to desired depth.
    Photo by Peter Rooke
  • The recess in the weight for the flywheel hub filed to shape.
    Photo by Peter Rooke
  • Wood template for weight arm and pivot pin support.
    Photo by Peter Rooke
  • Milling the weight arm for the lug for the governor sleeve.
    Photo by Peter Rooke
  • Using the mill to roughly round the weight arm before filing to shape.
    Photo by Peter Rooke
  • The roughly shaped weight arms before separating.
    Photo by Peter Rooke
  • The weight arms separated, with final filing to come.
    Photo by Peter Rooke
  • One of the weight arms being shaped with filing guides in place.
    Photo by Peter Rooke
  • Weight arm in place and ready to weld to weight.
    Photo by Peter Rooke
  • Completed weights and fittings going together.
    Photo by Peter Rooke
  • The latch arm bent and ready for welding, with washers for pivot.
    Photo by Peter Rooke
  • The latch arm, partially completed and trimmed to length.
    Photo by Peter Rooke
  • Trial fitting the partially completed latch arm.
    Photo by Peter Rooke
  • The completed latch arm in place, with some final finishing needed.
    Photo by Peter Rooke
  • Squaring up the main part of the muffler after welding the rim to it.
    Photo by Peter Rooke
  • Step-boring the inside of the muffler before final machining.
    Photo by Peter Rooke
  • Step-machining the outside. Not the difference in the steels used.
    Photo by Peter Rooke
  • checking the profile of the outside of the muffler using a template.
    Photo by Peter Rooke
  • The muffler with the pipe welded in place.
    Photo by Peter Rooke
  • Step-cutting the inside of the cap for the muffler.
    Photo by Peter Rooke
  • Shaping the inside of the muffler cap.
    Photo by Peter Rooke
  • The completed muffler.
    Photo by Peter Rooke
  • The old pushrod follower resting on top of the newly made one.
    Photo by Peter Rooke
  • Reaming the holes for the pins in the cam follower holder.
    Photo by Peter Rooke
  • The cam follower holder ready to assemble.
    Photo by Peter Rooke
  • The finished cam follower and holder with new pins installed.
    Photo by Peter Rooke
  • Turning the piston to give proper clearance.
    Photo by Peter Rooke
  • Checking the piston ring gap.
    Photo by Peter Rooke

This is Part 2 of Peter Rooke’s series on restoring a 1919 T. Eaton Co. engine. Start at the beginning with Part 1.

Governor weight

The governor weights were missing from the Eaton, as well as the latch arm that locked the pushrod and thus held the exhaust open. Fortunately, several photographs were found, including some very useful ones on eBay where the vendor had helpfully laid a ruler alongside the weight. There was only one weight for sale and the shipping costs and duty alone would have added another $35 to the price, so the photographs were a great asset in making the weights.

A single long piece of 1-inch-diameter steel rod was used to fabricate the two weights, making it easier to hold the work in the lathe chuck and vice. First, the 0.25-inch holes were drilled at the end of each weight for the springs, spaced 2.75 inches apart. Allowance was made between each of the two weights for parting off and the holes for each weight were drilled at 90 degrees to each other.

The steel rod was then machined on the mill, cutting rectangular 0.25- by 0.50-inch profiles at each end of a weight before transferring it to the lathe.



Using a ball turning tool set to a radius of 2.5 inches, the bodies of the weights were shaped. It was not possible to shape right up to the rectangular sections at each end in view of their different orientation. The cutter was stopped short and the radius later finished with a file.

To complete the weight body, the recess for the flywheel hub was filed, along with a flat where the arm would be welded. To mark the center line and the depth to file to, a hacksaw was first used to cut a shallow slot.



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