While moving brush with grapple for about 30 mins, I attempted to raise rpm's. With lever all the way down to full throttle, it would not go past 1500. I turned off and restarted 3x. No change. I turned it off and waited approximately 30 mins, and started her up and all is well. I ensured air filter was clean, which it was. Any idea what would cause this? It has happened before also.
2555HST Low rpm
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RNeumann
Elite Member
This is a shot in the dark as I have no idea on that model-
Some engines- especially computer controlled ones- won't allow the motor past a certain RPM if the PTO is engaged. If the PTO was engaged or the computer thinks it's engaged it may not allow higher RPMs. It would take a switch adjustment or replacement if the PTO wasn't engaged.
Some engines- especially computer controlled ones- won't allow the motor past a certain RPM if the PTO is engaged. If the PTO was engaged or the computer thinks it's engaged it may not allow higher RPMs. It would take a switch adjustment or replacement if the PTO wasn't engaged.
RNeumann
Elite Member
The other shot in the dark would be the TPS/APPS (something that tells the computer the throttle position). With zero info about Mahindra motors from the dealer I'd just check it with an ohm meter. You may see a flat or dead spot - especially as you tap/shake/move the sensor.
I'm still wondering how the PTO/engine speed ties together.
I'm still wondering how the PTO/engine speed ties together.
clevalley
Bronze Member
The only time I ever had this happen was below 20F degrees during startup and when the tractor overheated - the computer will not allow the engine RPM's to raise until it is safe to do so.
RNeumann
Elite Member
Hmmm same vain- computer getting false data that prevents going over a specified RPM.
