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I think you have a universal kit with the springs for two different piston pumps included in the kit. The seal and the needle bearing need to be replaced on the pump shaft while in there. The seal is not accessable unless the tapered roller bearing race is removed fromt he drive end of the pump housing which also houses the seal Carefully inspect the area of the shaft where the side thrust needle bearing makes contact on one side of the shaft. If there is a wear pattern here of as much as .010 the new seal will not make contact with the shaft because the shaft will be pushed to one side and allow air to enter the pump. The pump will not pump any air. If you were not having trouble with the pump loosing it's prime before you started the rebuild then the shaft is probably OK. If the kit includes the roll pins that act as stops for the ball valves do not attempt to replace them unless one or more of them are badly damaged or missing. This is sometimes a major undertaking because these roll pins are into a blind hole and you will have one heck of a time removing the old ones. If the old ones look good leave them alone! Do not use any gasket glue but do replace both of the gaskets on the pressure or front end of the pump. Their will be a cross point screw in the middle of the valve plate in the head of the pump and you should remove the screw and plate to replace the gasket under the plate. Be absolutely sure to remove all traces of the old gaskets. To fail to remove all the old gasket will mean doing it all over again plus removing all traces of the old gaskets. Been there and done that!
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