10-04-2018, 02:59 PM
Dave, good job on the pictures, it looks very well plumbed. The differential pressure setup is a good service tool. In looking at your set, I believe it is a Power Tech with a kubota engine and the electrical device at the back of the injection pump is an actuator for isochronous governing. These are notorious for sticking. Coach 785 was in my shop with the same problem several years ago. The air conditioning would add a unit, the engine wouldn’t pick up the load and the additional load pulled the set down. I’m betting the same thing is happening here. About the only fix is replacement, call Power Tech.
They aren’t difficult to replace, just two bolts and an O-ring if my memory is working correctly. Any adjustments are made with the controller unless they have used a programmable controller (no user adjustments).
On 785, I changed the actuator back to a solenoid and reset the injection pump to “droop governing”. I know this all sounds complicated but it isn’t really. It’s a “been there, done that” kind of thing. I can talk you through it if you desire to tackle.
What is the ball valve without the handle being used for?
They aren’t difficult to replace, just two bolts and an O-ring if my memory is working correctly. Any adjustments are made with the controller unless they have used a programmable controller (no user adjustments).
On 785, I changed the actuator back to a solenoid and reset the injection pump to “droop governing”. I know this all sounds complicated but it isn’t really. It’s a “been there, done that” kind of thing. I can talk you through it if you desire to tackle.
What is the ball valve without the handle being used for?
Gordon Jones
2000-45'-2slide-#567