Skip to main content

Volvo EC330B Excavator Battery Relay & Safety start Relay

Volvo EC330B Excavator Battery Relay & Safety start Relay



Battery relay
This is main relay for electric system. Volvo PTT Techtool 2.8.130
The relay turns the battery current ON or OFF, according to low power signals received from the start
switch. Use of the relay permits the start switch to control the power of the batteries with a small capacity
wire.
When you replace this component, pay attention to the +/- signs on the relay.
Wrong connection can cause early failure of relay.
2. Safety start relay
When trying to restart the engine while the engine is running, or if the start switch is in the START position
after the engine is activated, the relay cuts off the current to the starter motor to protect it.

Labels:

Comments

Post a Comment

Popular posts from this blog

Volvo EC330B Excavator Electronic Control System Overview

Volvo ECB330B Excavator Electronic control system overview   Volvo ECB330B Electronic control system is composed of various computers and its communication line. In our system, 2 computer (EECU, VECU) is programmable and 1 computer (MDU) is not. Volvo Tech Tool Communication is important thing to control the machine properly. We use two communication lines that is international protocol. The line is twisted to protect the bus from electrical interference.
Post a Comment
Read more

Volvo EC330B Excavator Engine Start and Stop Circuit Old Overview

Volvo EC330B Excavator Engine Start and Stop Circuit Old Overview  Volvo PTT Procedures: Engine Start and Stop Circuit(Old) Power from battery => electric greasing system,start key,start motor,battery relay Power from battery relay =>safety start relay Vocom 88890300 1) Key ON  BR=> Battery relay,alternator(15,pre-magnetization)  ACC=>VECU,Air conditioner,EMS power relay 2) Key Start  R2=> VECU  C=> safety start relay 3) Engine running  Alternator(L)=>hour meter,safety start relay,VECU(charge lamp off)  * Resistor between alternator and BR termainal for quick charge lamp off  Alternator(B+)=>alternator(BS,voltage sensing for regulation)  Alternator(15)=>battery relay 4) Key Off  VECU(JA61)=>battery relay
Post a Comment
Read more