D14 pops out of third gear

https://www.allischalmers.com/forum/d14-slips-out-of-gear_topic47924.html

Edited by steve(ill) - 09 May 2024 at 1:34pm

https://www.allischalmers.com/forum/d14-gears-jumping-out_topic190815.html

sounds like all the 190's!! LOL!! its an AC thing ! Tarp strap around the shifter solves the problem!

So what is CAUSING his present problem ?   Worn DOGS or DETENT ? Which one will FIX his problem ?  

The CAUSE of the present problem is as Myron also stated, "caused by careless operators grinding gears".

The RESULT of the continuous 'gear grinding' is eventually jumping out of gear.

There are a couple of possible fixes for damaged gear parts.

One is the very expensive replacement of the damaged gear and splined collar.

A much cheaper fix that may work if done properly is having a new 2nd and 3rd Shifter Rod / Shaft made   ( Allis # 226027 ) with a relocated detent groove.

I once had a D-15 that was impossible to hold in 3rd gear, even with 2 hands.

Using my fathers experience, I made a new Shaft with a relocated detent groove.

This rework cured the 3rd gear jumping.


The link I provided in my previous post still has a couple of pictures.

One picture is of the worn 'cogs' on the side of the gear.

The other picture is of the worn / damaged sliding Collar.


Steve

I'm curious as to what you are thinking to make this statement:

     Running TOO LONG with it slipping will eventually wear out the gears..

What's slipping?

Gary

SLIPPING OUT OF GEAR is not the CAUSE of the problem. Therefore SLIPPING out of gear - jumping out of gear - popping out of gear - is NOT going to cause further damage.

AS has been repeatedly stated, it's the grinding INTO gear that CAUSES the problem.

As the DR. pointed out, it's not the GEAR TEETH that get damaged, but rather the gear cogs and the sliding collar.

G

That's interesting.  So by that logic, fluid in rear tires is "poor engineering" too.  Tractors require some upkeep and maintenance to keep them whole and productive over the years. Grinding the transmission into gear every time the operator jumps into the seat is an operator problem. Throttling the engine down to a dead idle helps. Shifting into LOW gear first helps even more (no one uses low gear anyway and it is turning slower for less grinding) and then shift from low gear into third gear. Could the engineers have designed a transmission brake to cut down on the gear grinding?? Sure, but at a cost to the tractors retail price. Could the engineers have designed synchronizers into the shifting collar?? Again, they sure could have, but costs again trumped the decision not to.  Maybe not quite 90% of Farmalls have the TA fail in their lifetime, but a pretty high number do. Poor engineering?? On that note I might agree altho operator use plays some part in TA life too. Every tractor has its strong and weak points. Learn them and deal with what helps make the service life longer, like don't grind gears. Why would anyone think that was a good idea anyway ???  Poor design gives you the same design parts that failed to begin with to make repairs, knowing the same failure will again happen down the road. Grinding gears is an easy fix...don't do it !!!

Edited by DrAllis - 12 May 2024 at 7:26am

I  BET   Ron White could clear this up .

I don’t know anything about tractors jumping out of gear, but there was a big thread on red power magazine’s forum that the TA was a “wear item” and was meant to be replaced at certain intervals. And therefore it was not a part failure, it was poor maintenance. Not my opinion, just a statement by someone who also has Dr in front of their username. Smart Arse comment of the day, made.

Maybe its BOTH ??  If the tractor jumps out of gear and you redo the DETENT to get it to engage further and that FIXES the problem... Then that could be a DESIGN problem... By moving the Detent, you have not stopped the operarator from GRINDING GEARS to engage it ...  GRINDING can cause a lot of problems, but maybe there is also a Design problem ?

Note: there was a change in 3d gear on the D15 - retro'd to the D14 and CA - ask me how we know... ok, we got a unit in with mismatched gears.. I said impossible - it was but if you run them grinding .....