Jumpy on take off, stalls at top end

[Sergio]

That it is not an MCOR, it is a Curtis PB-6 5kΩ throttle box, wait until scottyb is back on line as he can give You more info on the best solution.

[wmstrick]

Thank you very much !!

[wmstrick]

Fs controller, D&D motor ,model170-004-0002A, 10.2 hp, 48 volt class-H motor.
My cart is a 36 volt converted 4 or 5 years ago with Scottyb's package listed above. Has been perfect and not a single complaint. Some how something has happened to cause the jumpy start with it stalling at run speed only to pick back up and than stall again.
I have probably done something to cause this, but i really do not know where to find help ? The micro switch has 2 wires out , one to silinoid and the other goes to front of cart somewhere.

[mgray70]

Originally Posted by wmstrick

Fs controller, D&D motor ,model170-004-0002A, 10.2 hp, 48 volt class-H motor.
My cart is a 36 volt converted 4 or 5 years ago with Scottyb's package listed above. Has been perfect and not a single complaint. Some how something has happened to cause the jumpy start with it stalling at run speed only to pick back up and than stall again.
I have probably done something to cause this, but i really do not know where to find help ? The micro switch has 2 wires out , one to silinoid and the other goes to front of cart somewhere.

I would bet the potentiometer is out of adjustment on the PB-6 causing it to be at half throttle when the solenoid clicks and goes out of range at full throttle causing a high limit error. I'm not familiar enough with that throttle enough to tell you how to adjust. Maybe Scotty will be by shortly and help you.

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[scottyb]

Typically these pots are rock solid for up to 30yrs of use. Likely water has entered the pot. This can be fixed with a hair dryer. If it must be replaced use a Curtis type PB-6 2 wire 0-5K