YM1700 - Broken fork Hi -Lo. Break tractor apart to replace ?

[1redroan]

Do I have to break apart the tractor to replace fork - Hi Lo lever shift. If not, I know to remove shift cover, then what do I do ?
Oh -- big howdy to all, I'm new to the FORUM

 

[winston1]

Not for sure which part you are wanting to replace, might take a look at this. Welcome to the forum.

Hi Lo shift lever (internal) R& R YM2000

I needed to remove the internal hi-lo shift lever on a YM2000 without removing gears from inside the transmission. The lever would not clear the gears to allow removal. Using a high speed grinder, I ground down the top and bottom sides of the external portion of the lever so that, upon...

www.tractorbynet.com

 

[1redroan]

fork inside transmission, moves gear in and out of Hi or Lo

 

[1redroan]

Not for sure which part you are wanting to replace, might take a look at this. Welcome to the forum.

Hi Lo shift lever (internal) R& R YM2000

I needed to remove the internal hi-lo shift lever on a YM2000 without removing gears from inside the transmission. The lever would not clear the gears to allow removal. Using a high speed grinder, I ground down the top and bottom sides of the external portion of the lever so that, upon...

www.tractorbynet.com

I added a picture, sorry trying to learn how to use forum

 

[bmaverick]

fork inside transmission, moves gear in and out of Hi or Lo

Looks very OE custom.

How do you know it's broken?

 

[ruffdog]

If it is popping out of gear it will need more than a shift fork. A common problem is the dogs on the side of the gears that engage the adjacent gear get worn and pop out under load. Both gears, the one with the dogs and the one with the pockets for the dogs will wear and will need replacement.

"popping" out of high gear

 

[winston1]

hi-lo range shift fork R&R

YM2000 hi-lo range shift fork is worn. What is involved in replacement and is the wear most likely a symptom of other problem(s)?

www.tractorbynet.com

 

[California]

I see I am quoted in both the linked posts!

12 years later now, an update: I can report that the bungee holding the range selector in high or low is still working 99% of the time. A couple of times per year it will jump out, at maximum load and when lurching over rough ground.

Since this YM240 is now used only to run its attached backhoe there's no urgent reason to split the tractor and replace several expensive parts.

Long ago an original Yanmar dealer posted that all related gears have to be replaced to fix the range selector jumping out of gear. Anybody know if parts are available?

 

[California]

Incidentally - I got the idea of the shifter bungee from a friend whose father raced jalopies long ago. He said in those $100 claimer junkers everyone welded a J-hook to the dashboard to hold the floor shift lever in second gear.

Something similar, rigid, in place of a flexible bungee might be a good-enough fix to go another decade.

 

[ruffdog]

Long ago an original Yanmar dealer posted that all related gears have to be replaced to fix the range selector jumping out of gear. Anybody know if parts are available?

It is possible to save the gears if the only problem is the rounded dogs. Shops have been undercutting dogs on gears for better engagement for many years now.