Doosan Heavy Duty Machine Pump EPPR Valve Check Guide

Doosan heavy duty machine VBO calibration require you to do pump EPPR valve check,so here show you the steps.

 

Preparations:

Doosan Data Monitoring System DMS-5 DMS-3 Free Download

Doosan Diagnostic Tool

 

Pump EPPR valve check

*Calibration judgement

3.1. Measure the input & output current of the pump EPPR valve in certain condition

Ex. DX350LC-7, Normal outputs of pump EPPR valve (Please refer the shop manual to check the exact value

on each model)

  1. Not in operation: 300 ±30 mA
  2. Pilot operation: up to 750 ±30 mA
  3. Relief pressure up operation: 800 ±30 mA

3.2. Check the physical condition of the EPPR valve

3.2.1. Assembly condition

3.2.2. External damage

3.2.3. Short circuit

Ex. DX350LC-7(Please refer the shop manual to check the exact value on each model)

3.3. Measure the resistance of the EPPR valve

3.3.1. Measure the resistance of the valve coil: If the measurement is infinite, this indicates an

open circuit of the coil in the valve.

3.3.2. Measure the resistance of the valve coil: If the measurement is 0Ω, this indicates a short

circuit of the coil in the valve.

More topics for Doosan,please refer to:Doosan Trouble Repair

auto

Recent Posts

PACCAR Brake Saver Oil Temperature Gauge Inoperative DTC138703 and DTC138704

This instruction show you guide on how to solve PACCAR brake saver oil temperature gauge…

1 hour ago

Deutz EMR3 Engine Trouble Code 19 / 676 / ArHtCD_NoLd Solution

This instruction show you guide on how to solve Deutz EMR3 engine trouble code 19…

20 hours ago

Fendt 1000 S4 Tractor 1001 Crossgate Lever Calibration Guide

Here is the instruction show you guide on how to calibrate 1001 crossgate for Fendt…

3 days ago

How to Adjust Neutral for Kubota L3901 Tractor Transmission

This instruction show you guide on how to adjust neutral Kubota L3901 tractor transmission.  …

5 days ago

ISUZU Construction 4JJ1 Engine P0089 Fuel Rail Pressure Regulator Performance

Here is the instruction show you guide on how to solve ISUZU construction 4JJ1 engine…

1 week ago

Massey Ferguson Tractor 6700 Trouble Code SPN 97, FMI 31 Water in Fuel

Here is the instruction show you guide on how to solve Massey Ferguson tractor 6700…

1 week ago