Volvo Truck Repair Guide

Volvo EC330B Excavator Brake Valve Operation Procedures: 1. Brake valve is now at neutral position. 2. The pressure of supply line goes high and this pressure applies to the backside of brake valve and then pushes the brake valve against spring. So return side oil can go to tank. Volvo PTT Diagnostic software 3. When machine travels at the down slope, this can cause overrun. That means the amount oil of supply line is less than expected. In this case we need brake function to control the machine from over-speed. The pressure of supply line becomes low and the brake valve return to the neutral position. So we can block the return line and slow down the machine speed. During this period, the orifice on the brake valve help machine to be driven smoothly. https://www.car-auto-repair.com

Volvo EC330B Excavator Rebound damping valve operation Volvo PTT 2.8.130  

Volvo EC330B Excavator Parking Brake Operation   Procedures: The slew brake is spring applied and hydraulically released. Friction plates are splined to cylinder block and rotate with cylinder block. Mating plates are splined to motor casing. Volvo Techtoo diagnostic software 1. When there is no SH signal, parking brake will be engaged by spring force. 2. When there is SH signal, primary pilot pressure(40bar) goes to brake piston through PG and push the brake piston against spring. 3. When there is no SH signal, Pilot pressure can not go to the brake chamber and oil in side of that chamber shoud be drained. But there is only small hole for drain near to time delay valve. In the beginning, oil pass through the orifice and go to tank, but pressure will be built up in front of the orifice and push the valve. Now the valve blocks tank line. There is no flow to tank. That means there is no pressure difference between front and rear side of valve. But the valve has return-spring at the r...

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

This instruction show on Volvo EC330B Excavator China GPS Overview. This option is only used in China. Volvo PTT

Volvo EC330B VCE telematics solution will contain three main services; Mapping and Tracking, Operational Management, and Service Management. Within Mapping and Tracking services such as mapping of machines, geo fence and location report will be included. Operational Management will contain performance and utilization reports. Under Service Management service for the different machines can be planned and followed up. Different alarms and error codes will be handled under service management.