jcb JS300 Service Manual page 14

Colour Codes
The following colour coding, used on illustrations to denote
various conditions of oil pressure and flow, is standardised
throughout JCB Service Publications.
Red
Pink
Orange
Blue
Green
Light Green
Yellow
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Hydraulic Schematic Codes
Full Pressure: Pressure generated from operation of a service. Depending on application this
may be anything between neutral circuit pressure and LSRV operating pressure.
Pressure: Pressure that is above neutral circuit pressure but lower than that denoted by Red.
Pilot: Oil pressure used in controlling a device (Pilot).
Neural: Neutral circuit pressure.
Exhaust:
Cavitation: Oil subjected to a partial vacuum due to a drop in pressure (cavitation).
Lock Up: Oil trapped within a chamber or line, preventing movement of components (lock up).
Section 1 - General Information
9813/5100-1
Use
Hydraulic Schematic Codes
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