Disc is guided by the mating surface of the seat.
It is considered that wearing failures of the plunger pair are mainly caused by the hard solid inclusions in the fuel, which act as abrasive grains to scratch the mating surface by "planing" action.
Clean the exhaust manifold and cylinder head mating surfaces.
Two-piece gland with spherical mating surfaces to assure an even packing load over 360%.
Large weldments in die structure will be machined on the mating surfaces, screwed together, welded, and normalized before final machining.
In some designs, they are flat at the mating surfaces to enable them to seal over an open wellbore.
Once you're satisfied with the fit, apply glue to all the mating surfaces, and slide the pieces together. Clamp the assembly securely until the glue has dried.
