750 will not shift into gears

[Buck]

My father-in-laws 750 hisun will not change gears unless he completely turns the motor off then shifts.  I thought it might be a brake problem but he thought clutch.  He took it to a jackleg down the road and he basically charged him $300 and did not fix a thing.  Any ideas would be useful because he really can’t afford throwing money at it.

[Ronald]

You can only change gears while stopped with foot on the brake.   Not sure if that answers your question but that's the way these things are designed?  I have the Axis Pro 750 and have found they have to be treated gently,   Great body, but the engine and transmission is not very good quality.    

[nods]

You didn't mention year or model, however, Sector 750s require the idle speed to be around 1600rpm or lower to move gear selector into desired position. If the idle speed is to high you will NOT be able to engage a different gear.

[Greg Kilgore]

19 hours ago, Ronald said:

...  Great body, but ... not very good quality.    

I know her. 😂 

[Buck]

21 hours ago, Ronald said:

You can only change gears while stopped with foot on the brake.   Not sure if that answers your question but that's the way these things are designed?  I have the Axis Pro 750 and have found they have to be treated gently,   Great body, but the engine and transmission is not very good quality.    

Definitely not the problem.  I wondered how the machine “knows” if you have your foot on the brake?  Sensor, relay, or mechanical device?
 

[Buck]

By the way,,,,,thanks for all the input!

[kpforce1]

On 8/3/2024 at 7:14 PM, Buck said:

Definitely not the problem.  I wondered how the machine “knows” if you have your foot on the brake?  Sensor, relay, or mechanical device?
 

There is a brake and neutral switch.  If the machine is not in neutral, the brake has to be depressed to start in gear.  The brake also has to be depressed for the reverse lockout to disengage to select reverse gear.  As others mentioned, if the idle speed is above ~1600 RPM it will not shift very well.  IF the CVT is engaging the belt at all (i.e. transferring any power to the transmission) shifting will be VERY difficult if not impossible without issues.  These machines use a wet clutch to engage a drum that drives the primary CVT clutch.  What is the machines idle speed when cold and when warmed up?

I do have to sometimes "blip" the throttle right before changing gears for a smooth shift.  The blip is useful when i have stopped and the belt hasn't returned to a "free" position.