424 Locking Diff Kit

BSLMS · Dec 13, 2017

Has anyone installed the locking diff pedal kit for the 424? I just found that one is available from YM and was wondering about it. We do occasionally get into situations where it would be helpful and I would like to install one.
Any idea on the cost? Will be checking with the dealer after the first of the year.

Yanmar Tractor · Dec 14, 2017

BSLMS said:
Has anyone installed the locking diff pedal kit for the 424? I just found that one is available from YM and was wondering about it. We do occasionally get into situations where it would be helpful and I would like to install one.
Any idea on the cost? Will be checking with the dealer after the first of the year.

Just checking to make sure you know this fact about your Yanmar Model 424 tractor. Yanmar Differential Lock - The Brake

dbracht · Dec 14, 2017

Yanmar Tractor said:
Just checking to make sure you know this fact about your Yanmar Model 424 tractor. Yanmar Differential Lock - The Brake

Good info. Thanks for sharing!

VeRV77 · Dec 15, 2017

I've used the brake lever many times to lock the diff on my 424. Seems to work just fine.

BSLMS · Dec 16, 2017

I was aware of using the brake pedal to engage the lock. I was just looking for a better method than trying to use one foot on two pedals. It's awkward when trying to regulate your ground speed and lock the Diff in a tight spot.

VeRV77 · Dec 16, 2017

I totally agree its awkward. I've never even tried to do it with my foot. I reach down an push it with my right hand.

DieselMachine · Dec 31, 2017

Awesome info! Too bad this wasn’t advertised more a few years back. Would have been a handy feature to use a few times. Thanks for sharing!

Erbid · Jan 26, 2023

Looks like the link moved: To Use The Differential Lock, Use The Brake - YANMAR America Corporation

I have the kit and thought it worked OK, but now I think I have no diff lock at all. Best I can do is 2wd, one front, one rear.

Erbid · Feb 19, 2023

Seems I was bit by the starter interlock to the parking brake, the parking brake interplay with the diff lock, the locking parking brake and asphalt. Noticed the diff lock as the tires slipped and the diff lock popped. Yuck. Rounded off the tips diff-lock pins where they are supposed to slip into the differential gear.

Adjusted the parking brake so it grabs noticeably at the first locking position. Now I need to turn it off before the tractor moves normally.

Erbid