Manufactured .005" Oversize Rocker Shafts
(Allis Chalmers 2900 and 3500 Series Engines)

  • 4140 Chrome moly gun barrel steel rifle drilled to 1/2"ID.
  • 2 Oil holes per rocker, one at factory location top pushrod side, Additional at major wear area/lower valve side.
  • Induction hardened to 45-50 RC.
  • Centerless ground to 1.005".
  • Honing of rocker arm and pedestal required.
  • Pin honing service available.
  • Valve tip wear pad resurfacing available.
  • Jam nut style adjuster screws available.


Rocker Shafts | Hartington, NE