Grand L Differential Lock Operation

[buck12]

I now have 35 hours on my 5460 Grand L and I have yet to master the differential lock operation. On my Mahindra 2615, I have owned for 12 years I push the the lock pedal while the tires are not moving. Once the tires start moving it takes a partial rotation and differential locks.

On the Kubota, if I push the pedal while the tires are not moving it stalls the tractor when I push the hydro pedal. If push the lock pedal while the tires are moving it is hit or miss if the lock engages. The manual is next to useless on this feature. What am I missing? Is there a problem with the tractor?

 

[Roadworthy]

You may have a tractor issue. I have the Kubota L2501. The differential lock on this tractor is controlled by a pedal operated by my left foot. It ALWAYS engage when depressed.

 

[5030]

First off, you need to be in LOW range. secondly, don't have the wheels spinning and engage the diff lock, you destroy it. Very expensive repair.

 

[PHILIP8N]

I wonder if the tractor stalls because you have taken weight off of the seat with all the pedal movement and the safety system is kicking in? The diff lock pedal has a strong spring, and takes a fair amount of force to keep it depressed. I changed my diff lock pedal spring out for one with less tension several years ago, works much better now. Philip.

 

[PHILIP8N]

Check out my post on page 2 and 3 of this thread. Philip. https://www.tractorbynet.com/forums/kubota-owning-operating/228484-5740-dif-lock-lever-2.html

 

[The Fred]

I wonder if the tractor stalls because you have taken weight off of the seat with all the pedal movement and the safety system is kicking in? The diff lock pedal has a strong spring, and takes a fair amount of force to keep it depressed. I changed my diff lock pedal spring out for one with less tension several years ago, works much better now. Philip.

:thumbsup: agreed mine is tricky also.

 

[jmc]

Check out my post on page 2 and 3 of this thread. Philip. https://www.tractorbynet.com/forums/kubota-owning-operating/228484-5740-dif-lock-lever-2.html

I had missed that modification. Well done, well documented.

 

[RjCorazza]

I think philip8n has it.
On my first tractor B8200 2wd, I actually wrenched my back bad using the diff lock. I heard muscles tearing!
Subsequent 4wd tractors have rarely required using the diff lock, or I would look into the mod.

 

[Gordon Gould]

I have a 2001 L3010 and have made extensive use of the diff-lock over the years working in the woods. I have never had any problems with it. The secret is to engage it before you need it. In other words with experience you can anticipate the trouble spots. Per the manual I always engage it when both rear tires are turning at the same rate and the tractor moving in a straight line. Never engage it when one tire is slipping or rotating faster than the other as in a curve. Push your heel on the pedal and you will feel it go into engagement. When you release the pedal if it doesn't pop out of engagement push on one then the other steering brake and it will pop out. Do not leave it engaged in a turn. No seat switch on this older model so spring tension is not a problem but the spring is fairly stiff to pull it out of engagement when the pedal is released.

gg

 

[buck12]

I wonder if the tractor stalls because you have taken weight off of the seat with all the pedal movement and the safety system is kicking in? The diff lock pedal has a strong spring, and takes a fair amount of force to keep it depressed. I changed my diff lock pedal spring out for one with less tension several years ago, works much better now. Philip.

That is something I will check this weekend. I honestly don’t know if this tractor has the seat switch. My Mahindra does not have a seat switch and with the cap on the Kubota I don’t think I have stood up while using the tractor.