Section 1 - General Information Terms and Definitions Colour Coding Hydraulic Schematic Colour Codes T11-006 The following colour coding, used on illustrations to denote various conditions of oil pressure and flow, is standardised throughout JCB Service Publications. Red Full Pressure: Pressure generated from operation of a service. Depending on application this may be anything between neutral circuit pressure and MRV operating pressure. Pink Pressure: Pressure that is above neutral circuit pressure but lower than that denoted by Red. Orange Servo: Oil pressure used in controlling a device (servo). Blue Neural: Neutral circuit pressure. Green Exhaust Light Green Cavitation:
Oil subjected to a partial vacuum due to a drop in pressure (cavitation). Yellow Lock Up: Oil trapped within a chamber or line, preventing movement of components (lock up). 1-41 1-41 9803-9880-3