L3750DT Movement issues

[trenn]

Barely moves forward of aft ?

(*MOD EDIT: Title changed

 

[North Idaho Wolfman]

One they never made a Hydrostatic in that model, it's just a gear drive tractor.
You have a fried clutch disk.

 

[trenn]

One they never made a Hydrostatic in that model, it's just a gear drive tractor.
You have a fried clutch disk.

Hydraulic shuttle shift is not hydrostatic ? I was thinking clutch. Now just have to figure out how to get to it.

 

[North Idaho Wolfman]

Hydraulic shuttle shift is not hydrostatic ? I was thinking clutch. Now just have to figure out how to get to it.

No a hydraulic shuttle is not a Hydrostatic transmission.
They are completely different transmissions.

Does it act exactly the same forward and reverse?
If it does then it's unlikely that it has to do with the shuttle clutches and it has to do with the main travel clutch.

There is 2 possible main clutch types for that model, single disk and dual disk.

Let's figure out what clutch you have, that might help us troubleshoot further.

Look at this part of the clutch pedal and tell me what clutch pedal you have

Dual clutch pedal, note dual arms (yellow).

Single clutch pedal
Note single arm (green)

 

[trenn]

Green single arm .According to the parts manual shuttle shift has single disk clutch. Moves about the same forward and backward. Did have a clutch problem pushed clutch in one day and machine did not stop, put shift lever in neutral to stop. Found clutch way out of adjustment. Adjusted IAW manual worked fine. Happen again twice then worked correctly. now barely moves forward or backward, PTO works, backhoe can be moved.

 

[Russell King]

@North Idaho Wolfman could you (should you) change the thread title

 

[North Idaho Wolfman]

Green single arm .According to the parts manual shuttle shift has single disk clutch. Moves about the same forward and backward. Did have a clutch problem pushed clutch in one day and machine did not stop, put shift lever in neutral to stop. Found clutch way out of adjustment. Adjusted IAW manual worked fine. Happen again twice then worked correctly. now barely moves forward or backward, PTO works, backhoe can be moved.

The fact that you've had issues with the clutch pedal would point to mechanical clutch being the issue.
But, the PTO working as it should, is not pointing to the mechanical clutch, its pointing to the hydraulic shuttle clutch or the hydraulic shuttle valve.

Are you sure the PTO is working with force when you try to move the tractor?

 

[trenn]

The fact that you've had issues with the clutch pedal would point to mechanical clutch being the issue.
But, the PTO working as it should, is not pointing to the mechanical clutch, its pointing to the hydraulic shuttle clutch or the hydraulic shuttle valve.

Are you sure the PTO is working with force when you try to move the tractor?

Going to wait to finish trouble shooting till the weather warms up.

 

[trenn]

Spring is here, went an started up after sitting all winter. The tractor moves itself ? Went up the back hill fine. Scratched out a spot for the shed I need to put up. I still think something is wrong with the clutch. How can this be ? Did have to add 1.5 gallons of transmission fluid last fall. Could that have made an air lock ?

 

[North Idaho Wolfman]

Spring is here, went an started up after sitting all winter. The tractor moves itself ? Went up the back hill fine. Scratched out a spot for the shed I need to put up. I still think something is wrong with the clutch. How can this be ? Did have to add 1.5 gallons of transmission fluid last fall. Could that have made an air lock ?

As far as the clutch working, you could have gotten rust on the flywheel which will make the clutch grab.

But Adding that much fluid could affect the shuttle operation.

I would run it some more keeping an eye / ear / feel on it's operation.

 

[trenn]

Will do, Thanks for the help

 

[trenn]

Today got 3/4 of the way up the back hill with a small load of dirt in the loader and slowed to a stop. Would not backup the hill also.
When I push down on the ground with backhoe it does not pickup the back of the tractor. When the clutch is out got noise. Could the shuttle shift pressure be off ? Fluids are good. Help

 

[trenn]

North Idaho Wolfman , any more ideas problem is back

 

[trenn]

Help

 

[North Idaho Wolfman]

Everything is pointing to a bad clutch.

I need the tractors serial number to iron out some details.

 

[trenn]

Everything is pointing to a bad clutch.

I need the tractors serial number to iron out some details.

s/n L3750DT-50749

 

[North Idaho Wolfman]

Is the Backhoe PTO powered or is it powered off of the Tractors hydraulics?

 

[trenn]

Is the Backhoe PTO powered or is it powered off of the Tractors hydraulics?

PTO powered

 

[North Idaho Wolfman]

Need to power the PTO and put it under a working load and try and move the tractor at the same time to know if it's the Mechanical clutch or the Hydraulic shuttle clutch that is the issue.
Have a friend that can operate the BH while you move the tractor?