320C, 322C and 325C Excavators Tool Control System – Relays



Illustration 1 g00988314

Hydraulic Lock Relay

The hydraulic lock relay is wired to the hydraulic activation control lever. This lever is to the left of the operator’s seat. When the lever is pulled back, the hydraulic lock switch (neutral start) sends a signal to the hydraulic lock relay. The relay sends a signal in order to lock the hydraulics.

Neutral Start Relay

The neutral start relay is wired to the hydraulic activation control lever. This lever is to the left of the operator’s seat. When the lever is pulled back, the hydraulic lock switch (neutral start) sends a signal to the neutral start relay. The neutral start relay energizes the circuit for the start relay. This allows the engine to be started by the key start switch.