IHC "H"

[cparsons]

In reverse pushing snow. Acted as if the transmission locked up. Pulled shifter and rails are in alignment. Pulled belt drive housing the gears I can see seem to be moving and correct. Jacked up both rear tires, each turn with no difficulity. So shifter seems to work rear wheels rotate but, when I let out the clutch the engine will slightly move the gears under the belt housing but will stalls out. Suggestions?

 

[tomtinker]

You may have problems with your reverse idler shaft which is farther back in the transmission.

 

[cparsons]

Do I need to pull the deck plate to access this?

 

[Janicholson]

In reverse pushing snow. Acted as if the transmission locked up. Pulled shifter and rails are in alignment. Pulled belt drive housing the gears I can see seem to be moving and correct. Jacked up both rear tires, each turn with no difficulity. So shifter seems to work rear wheels rotate but, when I let out the clutch the engine will slightly move the gears under the belt housing but will stalls out. Suggestions?

Do the rears rotate in opposition to one another, or with one on the ground/snow, the other in the air. If things in the tranny are locked up, they would probably be locked with one up and one on the ground. Reverse idler is a possibility. If one rear tire rotates with the other on the ground, the issue is at least not in the rear output shaft area of the transmission. A broken tooth on the reverse idler, or first/reverse slider could do it. Jim

parts layout.

 

[RedRamGT]

If you leave the clutch out with the transmission in neutral, does it move? That would be a way to tell if it's stuck in two gears - maybe one of them reverse.

 

[tomtinker]

Yes you would. It could also be the differental. Or even just water frozen in your transmission.

 

[Janicholson]

Do I need to pull the deck plate to access this?

Yes. and to fix it. If it is beyond the idler, the main input shaft would need to be removed. If it is on the counter (lower) shaft, it might need to be split to get enough access. Jim

 

[cparsons]

Do the rears rotate in opposition to one another, or with one on the ground/snow, the other in the air. If things in the tranny are locked up, they would probably be locked with one up and one on the ground. Reverse idler is a possibility. If one rear tire rotates with the other on the ground, the issue is at least not in the rear output shaft area of the transmission. A broken tooth on the reverse idler, or first/reverse slider could do it. Jim

parts layout.

Rotated rears one at a time one on ground one in the air. How is the first/reverse idler accessed?

 

[used red MN]

In reverse pushing snow. Acted as if the transmission locked up. Pulled shifter and rails are in alignment. Pulled belt drive housing the gears I can see seem to be moving and correct. Jacked up both rear tires, each turn with no difficulity. So shifter seems to work rear wheels rotate but, when I let out the clutch the engine will slightly move the gears under the belt housing but will stalls out. Suggestions?

Do you have a neutral? Under the pulley cover does the rear part of the transmission where the gears slide on turn independent of the front input portion? If your pilot bearing between the input shaft and main shaft is real bad and “doubling up” it could cause this. In neutral it will act as if it is in 5th. Not sure what model this photo is from it was taken with a boroscope, but the circled rollers in the center are what I am talking about. I don’t have time right now to post the parts diagram. I will do that later. I see Jim posted it, I am talking about bearing 38.

 

[Janicholson]

Rotated rears one at a time one on ground one in the air. How is the first/reverse idler accessed?

If one on the ground, the differential is forced to rotate the ring gear which rotates the pinion (which is a part of the transmission output shaft. Thus it rotates that shaft. if the reverse gear is locking up the system, the wheel may not be able to rotate that shaft. If a wheel rotates with one on the ground, at least the tractor can be moved where you can work on it by pulling with a different vehicle. Jim

 

[D Slater]

In reverse pushing snow. Acted as if the transmission locked up. Pulled shifter and rails are in alignment. Pulled belt drive housing the gears I can see seem to be moving and correct. Jacked up both rear tires, each turn with no difficulity. So shifter seems to work rear wheels rotate but, when I let out the clutch the engine will slightly move the gears under the belt housing but will stalls out. Suggestions?

If you rule out ice and transmission is actually shifting to neutral raise one rear wheel and turn tire with someone watching top transmission shaft, it should turn if both rear wheels are free like you checked. That would rule out transmission in two gears and most everything except lower shaft problem. Lower shaft is in constant mesh with reverse idler. Next thing to try, block clutch released. Put pto in gear and try to rotate shaft both ways both ways to see if anything dislodges and it starts moving. Not a fix but something to narrow problem down. Transmission input shaft can be removed without top cover off. Top comes off for shaft removal. Can be done without splitting tractor. One other thing make sure hydraulic unit is not locked up with ice or other. Drive coupling can be disconnected from bottom.

 

[Janicholson]

If you rule out ice and transmission is actually shifting to neutral raise one rear wheel and turn tire with someone watching top transmission shaft, it should turn if both rear wheels are free like you checked. That would rule out transmission in two gears and most everything except lower shaft problem. Lower shaft is in constant mesh with reverse idler. Next thing to try, block clutch released. Put pto in gear and try to rotate shaft both ways both ways to see if anything dislodges and it starts moving. Not a fix but something to narrow problem down. Transmission input shaft can be removed without top cover off. Top comes off for shaft removal. Can be done without splitting tractor. One other thing make sure hydraulic unit is not locked up with ice or other. Drive coupling can be disconnected from bottom.

Because he stated the tractor was being used backwards, In cases I have seen if moving they will stay moving, I remind him the the Intermediate pilot bearing (circled) can be bound with a small wire tie or string before complete separation so the rollers don't fall into the sump. Jim

 

[used red MN]

Rotated rears one at a time one on ground one in the air. How is the first/reverse idler accessed?

I think it is way more likely to be a problem with the shifter than the reverse idler. There is not really much that can go wrong with it. To access it this video shows you where it is at the 14 minute mark. This guy was doing a restoration on this H and put the reverse idler in backwards when he installed it the first time.
H transmission video