Spiva Const
Well-Known Member
- Joined
- Sep 28, 2016
- Messages
- 57
- Location
- Camino, CA
- Occupation
- Retired underground utility contractor
I have a 2002 hitachi ex135ur-5 that won't throttle up. Worked fine then sat for a couple weeks and the problem started. The key will start the machine but has no effect from the on. It will only idle and they key will not shut it off. I have to use the manual emergency stop cable.
I have another identical machine that does run so I've been switching parts but no luck. I have checked all the fuses, switched relays around, changed the computer, the step motor, the alternator, the key switch, the throttle control dial and pulled the main wiring harness connector behind the seat apart a die-electric greased it, along with greasing almost every other connector. I've checked the wiring harness for obvious damage except where it passes thru the firewall.
I've never had to work this hard on a machine to get no results. I've run out of ideas and a few suggestions would be appreciated.
If anyone has a wiring diagram I would be willing to purchase it.
I have another identical machine that does run so I've been switching parts but no luck. I have checked all the fuses, switched relays around, changed the computer, the step motor, the alternator, the key switch, the throttle control dial and pulled the main wiring harness connector behind the seat apart a die-electric greased it, along with greasing almost every other connector. I've checked the wiring harness for obvious damage except where it passes thru the firewall.
I've never had to work this hard on a machine to get no results. I've run out of ideas and a few suggestions would be appreciated.
If anyone has a wiring diagram I would be willing to purchase it.