LINES GP-BOWL CYLINDER 3342693 - Caterpillar

Illustration 1 g00875516
Automatic Lubrication RelayBoom Float RelayAutomatic Lubrication Relay
The autolube relay is an output of the machine ECM. The relay will energize the autolube solenoid valves or the relay will de-energize the autolube solenoid valves. During the lubrication interval, the ECM energizes the relay and the relay energizes the solenoid valves. The ECM sends a signal in order to energize the relay. Four of the five relay terminals are used. One coil terminal receives the output signal from the ECM and the other coil terminal returns the signal to the ECM at the solenoid return. The coil terminal connects to the +battery terminal of the grease reel switch. The normally open terminal connects to the solenoid valve. The normally closed terminal is not used. The relay is located in the electronics compartment behind the hydraulic tank.The autolube solenoid valve is not directly connected to the machine ECM. The autolube solenoid valve connects to the normally open contact of the relay. The solenoid valve is the on/off type. When the relay is energized, the contacts close and a + battery signal is provided in order to energize the solenoid valve.