The provisions of subchapter I of this chapter, excepting section 601 of this title, shall apply to actions of an equitable nature by and against executors and administrators, except as in this subchapter otherwise or specially provided. All causes of action of an equitable nature by one person against another, however arising, survive to the personal representatives of the former and against the person representatives of the latter. When the cause of action survives, as herein provided, the executors or administrators may maintain an action of an equitable nature thereon against the party against whom the cause of action accrued, or after his death against the personal representatives.