Every few minutes or sometimes ever 20-30 minutes just depending, when you use a hydraulic control, it will bog the engine way way down and it will kill the engine if you don't let off and slowly get into the control. After you let off, it may or may not do it again when trying to use hydraulics. Where are relief locations and screens for hydraulics on this machine? Any other suggestions would be great... Thanks guys!
It sounds like the pump is not getting the command to destroke consistently when a load comes on the hydraulic system if sometimes it does it and sometimes not. Does this apply only to the hydraulic functions or does it happen when travelling as well..? Do you have a Serial Number..?
take a look at the fuel pressure in the monitor when it happens.
Travel as well. JJG1136
Are you getting any alarms when this happens? Have you checked the monitor panel for fault codes?
No alarms or fault codes.
No other inputs?
Did you check the fuel pressure as suggested above..? If so what was the result..?
Not yet Nige. Going back to machine tomorrow. Is the fuel pressure on the indicator screen on these?
Where is the prv located on this machine? Any way to test without ET?
According to Per Erikkson in post #3 you can see it on the monitor but without information as to what S/N your machine is it's hard to say for certain. Otherwise tap a gauge into the filtered fuel port on the side of the secondary fuel filter head. The fuel pressure should be around 50-70psi under all normal operating conditions.
It's in post 4 Nige. JJG1136
Ooops, my bad. TBH I've never played with the Monitor on one of these models. Per's far more of an excavator expert than me so if he indicates that you can read it off the monitor I'm sure that's correct. There is a fuel pressure sensor mounted on top of the secondary fuel filter so obviously the pressure is monitored somewhere.
No luck breaking into the monitor. Any ideas on the code? Should be factory. Any luck on the prv solenoid location Nige??
What should my power shift pressure be under load and not under load?
Factory password for the monitor should be FFF2.
Okay, fuel pressures are not dropping. Staying in the mid 70's.... You can check your pump and fuel pressures on the monitor btw...
did you solve your bog down problem, my 120 hitachi is doing sounds like exactly the same thing , ive checked about all I know to check on mine and need help quick ???
When it goes down, does it smoke?
Does not smoke at all.