The horizontal deflection is not wide enough. There is no vertical output transformer in the set. All resistors and caps have been replaced. See schematic. On the horizontal yoke there is a cap from the center of the yoke to one end(56pf). could this be causing the problem?

Could the lack of the vertical output transformer be affecting the width?

And if you think it is the 56pf-What would be the voltage rating for it?