The utility model discloses a parallelly connected free clearance of hydraulic retarber bearing and a plurality of product tolerance accumulation automatic regulating apparatus belongs to hydraulic retarber rigging equipment field, including spacing shell and belleville spring, spacing shell setting is in belleville spring is outside, belleville spring comprises big terminal surface and small endface, the belleville spring both sides are provided with bearing inner race respectively and support diameter of axle ring terminal surface, belleville spring with it is provided with fixed convex points to support between the diameter of axle ring terminal surface. The utility model discloses a to the automatically regulated in the free clearance of bearing, it is life and availability factor tohave improved the bearing, and it needs to accomplish retarber design, has reached hydraulic retarber global design requirement, reduces the rate of utilization of your majesty's time device, preventsthat the brake from frequently using malfunctioningly, has improved tire and brake life -span, has improved the operation cost, the assurance people's safety of life and property.