If your using green bearings you don't need the axle seals.They have o-rings and sealed bearings.Just apply a coating of RTV silicone in the housing bearing bores and install the axles.Trying to use axle seals will drive you crazy unless your using stock axles and housings,the aftermarket axles vary in diameter from different MFGs.Also tube diameters can vary as well as aftermarket housing ends.Some have no register for seals.