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John Deere 4440 diff lock problem

9.9K views 3 replies 2 participants last post by  Hoodoo Valley  
#1 ·
Hey there.

I'm new here and I'm sorry if I put this thread into the wrong category.

I have a 4440 2wd with quad range transmission.
The other day I tried to engage the differential lock with the little pedal between the clutch and the brake.
It feels like the pedal is stuck. I have no chance to push it down.

What would be wrong with it ? It worked fine about 3 weeks ago.

I also have a problem with the hydraulic couplers on the tractor.
The odd time one of the hoses just pops out. I would be running my haybine and all of a sudden the hose pops out. Then I push it back in, lock the coupler again and it will work for an hour or so.
I tied a string to the lever underneath the coupler to hold it against the frame. It never popped the hose out again. But I don't think that's a good way of solving the problem.

I can't wait to hear the opinions and ideas from the other member here.

Thank you
 
#3 ·
Hey tractor beam.

No I haven't taken a closer look at the diff lock yet. But I am going to do that first thing in the morning. I just can't believe how "stuck" it is.
The previous owner of the tractor had the diff lock fixed about 2 years ago. I bought the tractor about a year ago and I maybe used the differential lock a hand full of times. But I never had any trouble until lately.
Thank you for the advise !
 
#4 ·
Hey tractor beam.

No I haven't taken a closer look at the diff lock yet. But I am going to do that first thing in the morning. I just can't believe how "stuck" it is.
The previous owner of the tractor had the diff lock fixed about 2 years ago. I bought the tractor about a year ago and I maybe used the differential lock a hand full of times. But I never had any trouble until lately.
Thank you for the advise !
I hope it helps, or someone else can better help you.