mg2361
Senior Member
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Hitachi ex100-3
- Thread starter Darreng
- Start date
Was looking at it today again.. with it’s own pvc error code 22 comes up.. it’s got 24v at pump and sending signal to pdsv 1 but no signal to 2... and hydraulics is slow...
With the other pvc (120-3) same code 22 coming up hydraulics is fast in full pump and no 24volts to pump
With the other pvc (120-3) same code 22 coming up hydraulics is fast in full pump and no 24volts to pump
Unplug the solenoids and test the harnesses for 24v on the left wire (I think) with the clip up key on and 0v key off Make sure the solenoid plugs are not crossed the tech book is very confusing about which solenoid is 1 and 2 and what they do.Mg nailed it with how the power gets to the solenoid,if you are getting codes by blink test just remove your jumper with the key on to clear codes same as unplugging DR X
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Still showing code 22 checked wired to solenoids all seems good and valves are working can’t find any-problem there.. there is one pressure switch faulty behind the cab but from what I understand then don’t have anything todo with controling the pump am I right??
And there’s a sensor of some kind on the dipper supply pipe coming of the valve chest any one know what that is or what it’s for ?
And there’s a sensor of some kind on the dipper supply pipe coming of the valve chest any one know what that is or what it’s for ?
LACHAU
Senior Member
First, I would like to talk about how the main pump of the EX100-3 INCREASES or REDUCES FLOW rate.
Note that: PUMP displacement solenoid valve is high speed solenoid valve, they only operate in ON-OFF.
Note that: PUMP displacement solenoid valve is high speed solenoid valve, they only operate in ON-OFF.
LACHAU
Senior Member
The Angle sensor (A-Sensor) is mechanically linked to the pump valve plate. It converts its physical position to a voltage signal and sends this signal to the controller (PVC).
So that we also have to check the mechanical linkage.
What’s the best way to check the angle linkage?
and if that’s all good could it be a fault in the pvc itself??
LACHAU
Senior Member
- It's easy to check whether PVC's working normal or not. You can look at the RED LED on top of PVC.
- Take-out A-sensor==> operate any function==> look at the hole on pump. Also take this opportunity to examine the main pump solenoid valve.
The led on the pvc flashes 1 second on and 1 second off and so on..
I done the lamp test on the solenoids on solenoid no 2 it blinks when u start the digger but nothing after that... no 1 blinks aswell
must check see I the A sensor linkage is ok now...