Description Part Number: 5663305 Description: Regulator Kit Application: Kit with Oil Presssure Regulator & Orifice Plug (known as viscosity sensor). Suits L10, M11, ISM11, QSM11 Cross Reference-Supersedes: 3066784, 3069728, 3068408, 3068979, 5623322 Features: Replaces old part numbers 3069728 & 3068979. The old style lubricating oil pressure regulator orifice (known as the viscosity sensor) is not restrictive enough to support stable lubricating oil pressures at high lubricating oil temperatures that typically occur at or near rated speed. A new orifice plug has been released (5568108). This part replaces the viscosity sensor and is more restrictive, promoting oil pressure stability. Kit Contains: 1 x 5623322 Pressure Regulator Plunger 1 x 5568108 Viscosity Sensor Related Parts: 1 x 3010146 Compression Spring 1 x 3821725 Retainer Plug