shutting down, temp guage fluxuates, error codes

[Vintagecarlover]

753g showing temp alarms and shutting down. temp guage would peg and then role temps up and down to normal. hydraulic temp high alarm. changed hydraulic filter, no help. trying to find hydraulic sensor locally so as to avoid the shipping time. tried grounding temp sensor harness to engine and no change to the guage, didnt peg. any help diagnosing my issues would be appreciated. im guessing its a wiring or ground issue and have looked at wiring harness with nothing obvious. machine is on a job with 1 hr left to complete. also, traction lock and hydraulics and aux were acting all kind of crazy or not working at all. tia for ideas. battery terminals are clean and tight. drive belt feels tight. 12-23 11-05 09-21 these are my codes

 

[Vintagecarlover]

any help?

 

[flyerdan]

any help?

In the manual thread there is a link that has all the error codes and what they mean, you should also be able to find a repair manual for the 753. It sounds like a bad connection in a relay plug in or something similar.

 

[isoscell]

Hi, this defect is common in these machines, the cause is the controller. Do a simple test, check how many volts you get at the engine temperature sensor connector (with the sensor disconnected), it should be 8v. If it is more or less, it turns out that you have a faulty controller. This controller can be repaired guaranteed at www.isoscell.com