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Case Catalog Illustrates Mounting and Gearing

| September 2007

  • ViewofCase110HPCountershaft.jpg
    Top left: View of Case 110 HP countershaft and rear axle, long hubs of traction wheels, distance links and springs supporting boiler.
  • ViewofCase110HPCountershaft-1.jpg
    Above: View of Case radius links, distance link and springs supporting boiler, springs under platform and in drawbar.
  • CaseBuiltHugeSteamTraction.jpg
    Above: Case built huge steam traction engines, like this “Road Locomotive,” which was a 150 HP monster.
  • CaseBuiltHugeSteamTraction-1.jpg
    Left: A rear view of the Case 110 HP engine at Mt. Pleasant. Note the high number of spokes in the wheel, needed because of the machine’s great weight.

  • ViewofCase110HPCountershaft.jpg
  • ViewofCase110HPCountershaft-1.jpg
  • CaseBuiltHugeSteamTraction.jpg
  • CaseBuiltHugeSteamTraction-1.jpg

The sectional cut herewith illustrates how the boiler of the Case engine is suspended on springs and carried in front of the rear axle and countershaft. This is a notable feature of the Case engine.

In order that you may better understand this feature of construction: Suppose the axle of your wagon was run through the box, would not the wagon feel every light as well as heavy jolt while being driven over the road, and would not the life of the wagon be shortened? The traction wheels and gears of Case engines are mounted independent of the boiler and firebox by means of radius links, which connect with the countershaft. Steel spring-pot brackets, resting on spiral springs, support the weight of the boiler. These springs are suspended from the lower cannon gearing, which encases the axle, on eye-bolts which allow the springs free play.

The distance between the countershaft and rear axle is maintained by distance links, provided with turnbuckles, which allow the gears to be kept in perfect mesh. These links permit an up and down movement of the boiler without in any way disturbing the mesh of the gears or the equilibrium of the boiler, and without subjecting either to shocks or strains.

Side play of the boiler or countershaft is prevented by means of a steel cross link held to the rear of the boiler by a stud bearing, which is fitted over a trunnion of the upper cannon bearing. On the lower cannon bearing is a heavy lug, which is kept in position by parallel guides riveted to the boiler below the fire door. This arrangement, with the cross link above prevents all side and end play. Our system of spring mounting is not only theoretically correct, but for many years has proven thoroughly efficient on engines doing all kinds of road or contract work and plowing. In addition to the spring mounting of the boiler and spring differential, the platform is mounted on springs, the drawbar has a good strong one, and each of the guide chains has one to give elasticity and to keep the chain taut.

- 1913 Case catalog


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