Seal assembly for hydraulic pump output shaft

A hydraulic pump, comprising:

• a housing;
• a shaft rotationally mounted at least partially within the housing;
• a spacer ring mounted to the shaft;
• a rotor mounted to the shaft and having a first side and a second side, the rotor first side engaging the spacer ring;
• and
• a spring-loaded face seal coupled to the housing and having a face in contact with the rotor second side, the face seal configured to supply a force against the rotor sufficient to cause the face seal face to sealingly engage the rotor second side.

A seal assembly for a hydraulic pump, the system comprising:

• a spacer ring;
• a rotor having a first side and a second side, the first side engaging the spacer ring;
• a stator having a face in contact with the rotor second side;
• a seal case within which the stator is disposed;
• and
• a spring disposed within the seal case, the spring configured to supply a force against the rotor that is sufficient to cause the stator face to sealingly engage the rotor second side.