Refueler
Well-Known Member
Hydraulics guy came to day ...
5 mins later had the main -ve cables in hand .. showing the completely corroded / burnt out ends ...

Opinion is that the HIAB has been working with faulty pressure switch. He asked how it usually worked .. and I said that I switch on and pump immediately kicks in to pressurise .. that it runs continuously. After about 30 mins or so working cuts out and I have to wait for oil / pump to cool before I can use again. I usually switch on .. lift .. switch off .. do whtever and when I need HIAB again - switch on .. keeping the actual ON times as short as possible.
I always assumed it was old and worn .. oil a bit low etc.
He replied that pump should only run when operating controls to maintain pressure .. a pressure switch should stop the pump when idle. He reckons over time its destroyed the -ve connection.
We tried bridging the cable - but did not work - so maybe internal damage as well.
Motor is now out and off to repair shop to check it out ...
5 mins later had the main -ve cables in hand .. showing the completely corroded / burnt out ends ...

Opinion is that the HIAB has been working with faulty pressure switch. He asked how it usually worked .. and I said that I switch on and pump immediately kicks in to pressurise .. that it runs continuously. After about 30 mins or so working cuts out and I have to wait for oil / pump to cool before I can use again. I usually switch on .. lift .. switch off .. do whtever and when I need HIAB again - switch on .. keeping the actual ON times as short as possible.
I always assumed it was old and worn .. oil a bit low etc.
He replied that pump should only run when operating controls to maintain pressure .. a pressure switch should stop the pump when idle. He reckons over time its destroyed the -ve connection.
We tried bridging the cable - but did not work - so maybe internal damage as well.
Motor is now out and off to repair shop to check it out ...