Oldiron29

Well-known Member
Went to a show today and saw a 39'H FBH1606
Tag block and frame # all Match. Frame was stamped front right top rail. Casting code 8/24/I
on most part. Below the block serial # DERO ? very hard to read Might say demo. Left side of trany casting said (special)What could the stamp below block be? and special on trany mean? Did any 39' come with rubber tire? I don't see 5th lock out. Thanks oldiron29
 
I think 39's came standard with tires until WW2. Many were ordered with steel wheels. I wonder why 5th was locked out if equipped from the factory with steel wheels. The H does not have enough power to turn the steel wheels on hard or soft ground.
 
I thought (from advertising literature) that steel wheels were standard with 10 by 36 pneumatic tyres as an option/ The gearbox was the same with steel wheels or rubber tyres, just that with steel wheels 5th gear (straight through drive) was locked out but could be unlocked if changed to rubber tyres at a later date.
 
(quoted from post at 17:20:51 10/12/14) I think 39's came standard with tires until WW2. Many were ordered with steel wheels. I wonder why 5th was locked out if equipped from the factory with steel wheels. The H does not have enough power to turn the steel wheels on hard or soft ground.
Are you saying an H with steel wheels couldn't move itself? I don't understand your post
 
(quoted from post at 08:03:45 10/13/14)
(quoted from post at 17:20:51 10/12/14) I think 39's came standard with tires until WW2. Many were ordered with steel wheels. I wonder why 5th was locked out if equipped from the factory with steel wheels. The H does not have enough power to turn the steel wheels on hard or soft ground.
Are you saying an H with steel wheels couldn't move itself? I don't understand your post

Neither do I. Plenty of F20s were on steel, and the H is the replacement for the F20, with even more power, so?
 
They could have rubber. IH tested FBH 602 and 744 with 36 inch rubber at Nebraska. Lots of pictures of pre production and early H tractors with rubber.
Special is sometimes found on IH castings a lot later than the 39 H. Several ideas as to why were posted on this forum before. I don't remember all the answers.
Don't know on the engine, but if the engine number matches the chassis its probably nothing to special.
 
The H came out with more power, BUT that power was lost due to the higher speeds that the H could generate, and that entailed more horsepower to accommodate those speeds doing the same chores the F-20 had done. Same with the Reg compared to the F-20. They could both do the same work, The Reg just did it slower.
 
Think he meant if 5th wasn't locked out with steel that the H would have low power in that gear. Especially at the low speed you would need the RPMs at to stay safe or hang on. Some older fellows around my area told me tales of turning the iron wheeled ones on there side just by one rear wheel going over a rock on level ground.
 
I was on just the right ground one time slightly downhill. Not to soft, not to hard. I shifted into 5th and was quit impressed when the tractor propelled itself on steel. In most cases an H would typically not be able to do that, but its not impossible. I think the bigger thing was to keep people from shifting into 5th by mistake.
 
The H engine runs at higher RPM's than the F-20. I think on an out and out stump pull though, the F-20 probly a little tougher than the H. When rolling and making use of the extra RPM's, the H would probly win that ticket. So in other words draw bar to draw bar the F-20 would win. Farming side by side, the H would win.
 
I tried making my dad's H on steel to run in 5th several times in varying conditions -- it would not, I could probably get the clutch to slip and force it to move, but under those conditions the engine would probably die. It simply did not move.
 
I would think it more of a safety issue than power: easier to flip or shatter an axel housing hitting a rock in 5th on steel.
 

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