Got a 450lc3 and when we dig in hard rock it will fall on its face and act like it’s not getting fuel when you use any hydraulic function, feels like a filter issue but if I stall it out or turn it off and start right back up it’s back to normal. Run the **** out of it all day but the second it is bouncing on hard ground it acts up. Seems like electric issue. Any idea where to look
Sounds like the engines de-rating intermittently. Any service codes ?, may help where to focus.
Coiuld be a lot of things, from a chunk in fuel tank that bounces up and plugs fuel intake within tank, to loose ground or power wires that when the machine has a lot of vibration or bouncing causes wires or cables to tug and lose connection. Better check for codes as Diesel Dave has stated to start somewhere. Simon C
Seen a truck with a Detroit DD15 engine that would die when under heavy load in a hill. End problem was a loose 10 amp ATO fuse feeding the computer and dead instantly. Need to prove that there is clean power to computer and ground back out of it. These are the real kinds of things that are happening out there and they were going to buy the $10000 computer until I talked the shop foreman into checking for clean power just in case. Once all the simple stuff for no money has been tested then the parts can start. Simon C
Worth checking any Relays that send power to key, power to fuel solenoids, power to computers. Had a skid steer that would die after 10 minutes with a blown fuse for instrumentation panel. Pulled the relays and checked how tight the female receivers for the relays were and tightened up quite a few. Case uses tiny relays with tiny pins. Never died again. Any four or five pin relay can have one pin looser and relay drops out under heavy vibration. Lots of small things can kill it without any code also, just so you know. Simon C