Yanmar 1500d Shifter Stuck in Housing

[ceparker133]

My tractor is in first gear and the shifter won't move freely it's stuck. I cant figure this thing out.
How do I free the shifter up?

 

[CincyFlyer]

Is it the shifter, or the transmission?

 

[ceparker133]

the shifter and the transmission cover the transmission gears actually look good.

 

[ceparker133]

the shifter won't go to its right position in the shifter housing.

 

[Stimw]

Some times a shifter will get stuck with a rail in a gear and the shifter rod in neutral.
When it happens you need to get the rail that is in gear back into neutral.
It happens when there is wear on the shifter stick and/or rail slots.

 

[Dave M7040]

If the cover of the transmission comes off with the shifter itself, remove it and then look for sliding pieces on rails. The sliding pieces have slots in them.

You need to move each to the middle position so all notches are adjacent to each other.

Then as you reinstall the cover, make certain the lower end of the shift lever is going into the combined slider notches.

This locking of the shift lever can happen from wear but also shifting gears when the transmission is under load. For example, you have a FEL, you are digging into a pile of dirt and the tractor front wheels have gone up on the pile. In this situation, the weight of the tractor is keeping pressure on the transmission internals. If you shift to reverse at this time, there will be resistance and if you continue, you may move the reverse gear shifter slider but the first gear one jumps back rather than staying in neutral. Now the bottom of the shifter lever cannot access the other sliders and you cannot shift.

Post a picture or two with the cover off if this above is hard to understand.

Dave M7040

 

[ceparker133]

If the cover of the transmission comes off with the shifter itself, remove it and then look for sliding pieces on rails. The sliding pieces have slots in them.

You need to move each to the middle position so all notches are adjacent to each other.

Then as you reinstall the cover, make certain the lower end of the shift lever is going into the combined slider notches.

This locking of the shift lever can happen from wear but also shifting gears when the transmission is under load. For example, you have a FEL, you are digging into a pile of dirt and the tractor front wheels have gone up on the pile. In this situation, the weight of the tractor is keeping pressure on the transmission internals. If you shift to reverse at this time, there will be resistance and if you continue, you may move the reverse gear shifter slider but the first gear one jumps back rather than staying in neutral. Now the bottom of the shifter lever cannot access the other sliders and you cannot shift.

Post a picture or two with the cover off if this above is hard to understand.

Dave M7040

Here are a couple pictures of the housing and how id doesn't fit correctly like it used to.

Thanks,

Chuck

 

[ceparker133]

I uploaded a couple of pictures for you to view. The part does not look like is worn out I just cannot figure out how get everything to line up.

Thanks,
Chuck

 

[Dave M7040]

I uploaded a couple of pictures for you to view. The part does not look like is worn out I just cannot figure out how get everything to line up.

Thanks,
Chuck

Chuck
I have marked up your first image. It is different than my earlier post in that more components are in the cover assembly.

I have drawn a red line across each of the three shifter forks and numbered them #1, #2 , #3. I drew a yellow line around the curved form of one of the 3 shifter forks to make certain my description is clear enough.

The shifter forks slide over a gear like if you made a U shape using your first and second finger. The parts of the gears where these shifter forks mate should be quite obvious but post a picture looking into the transmission.

The shifter forks have to be synchronized so that only one gear is being slid into a position where it engages with another gear at a time. If two gears get engaged to its mate at the same time the transmission is locked and possibly broken.

The synchronization is accomplished with ball bearings popping into recesses by small ball point pen like springs. The ball bearings being in their mating hole lock two of the three shifters in neutral while the remaining shifter fork is selecting its gear. The fork will move its gear either forward or backward.

If the shifter lever will come off the top of the cover it may make things easier. Once it is off, you need to slide each shifter fork backwards and forwards looking for a middle position for each.

When you think you have all three in their right position, reinstall the shifter lever. If you have done things correctly, you should be able to shift gears without putting the cover back on.

With that accomplished, put the shifter lever in neutral and then move the sliding transmission gears so they line up with the respective shifter fork.

Hope this helps you move forward.

This youtube video might give you more insight into the inner working of a manual transmission. This transmission incorporates gear synchronizers which I doubt your Yanmar has but nevertheless the shifter forks work the same.

Dave M7040

 

[Stimw]

Your shifter is probably in neutral and one of the rails is in gear.
Each rail should have 3 positions, move each one and find the center position.
That should free up the shifter to slect different gears.
Then move the gears in the trans to line up with the "C" pieces and put cover back on.