Bit off topic , can't keep one of my forklifts (Moffett) running
My TYM compact tractor acted much the same way. However, it kept blowing a 25 amp fuse that controlled the PTO and shutdown relay. I had to straight wire the fuse to get it back into the garage. I stripped the wiring harness thru to look and found no bad places. I ended up buying a fault tracer that works a lot like an underground utility locater and used it to trace the fault. It took me to the shutdown relay that cuts the fuel off to stop the engine when you cut the key off. The guy that works on Mahindra tractors at the local place said to just bang on the side of the relay with a wrench until it works! :rolleyes: I thought WTH? I did it and it's worked fine ever since. My tractor has a 25 HP Mitsubishi 3 cylinder diesel. I know your piggyback forklift probably has a bigger engine, but maybe they all operate the same. Good luck with it. Mine had me :BangHead: for a while!