shifting on the go

[oldhippy]

I work with a man that has a YM 1500D. We were talking and he says that he shifts on the go. I have a YMG 2000D and have never done this. I have a small place and don't need to get anywhere fast. I thought that on this forum they had warned about shifting while moving. Any input?

thanks big dan

 

[SailorBob]

I have a YM1700 and while it is a manual non synchonized tranny I have found that you can sometime shift without stopping. It usually works between 3rd and 4th gear most of the time

 

[normde2001]

I have a YM1700 and while it is a manual non synchonized tranny I have found that you can sometime shift without stopping. It usually works between 3rd and 4th gear most of the time

What happens the rest of the time ?

 

[Eddie]

The only time I stop to shift my 1700 is when going from forward to reverse. I kinda find this hard to comprehend

 

[Gizmo36]

Some times I have a hard time shifting when my YM1700 is not moveing . I don't think It will shift when it is moveing . I have not tryed it, Maybe I should.

 

[buppy69]

We used to have a Farmall 140 that you could upshift while moving if you did it fast enough. Of course I was a teenager then. I wouldn't do it now.

Eugene

 

[oldhippy]

Thanks for the input. Sounds like you could do it. I ain't going to try it. I sometimes grind with it sitting still. Thanks big dan

 

[Bob85355]

I have a 1500 and I shift up and down all the time without stopping. Truth is, I've never considered stopping until reading this thread.

Shifting up has never been any problem. Shift down, I normally double clutch.

But, if you're afraid to do it or have doubts that you can do it, you probably shouldn't.

Bob

 

[Mace]

I have a 1500D. I have found that it will shift on the go...but I think it is just like shifting a car without putting in the clutch.....If the RPM is just right it will work, but I don't know if it is bad for it or not. I only found out it worked by accident.

I know the owner's manual I bought for it says not to, so I don't.

 

[spyder2]

The older Trucks (I am not referring to the Ford F250 size vehilces that you refer to as trucks in the States but the bigger 3 - 5 ton size - I don't know what they are commonly referred to as) the gearboxes were not fitted with synchromesh so the only way to shift up or down was to double-clutch. This was in order to get the two gears you are wanting to engage spinning at close enough the same speed for the gears to engage without grinding or to engage at all. The exact same concept should apply to a tractor gearbox. We always shifted the Tractors on the farm on the go (JD and MF) without any ill effects. I cannot comment on the Yanmar in terms of long term effect but I tested on my 240D and can easily shift from 7 to 8 and can shift from 8 to 7 with a double-clutch. I did not try any of the other gears as it should not be necessary. You can pull away easily in 7th gear anyway. If you cannot do it without grinding the gears or forcing it you should probably not do it. You are however more likely to damage the gear selectors than damage the gears themselves if you force it.

 

[Egon]

The double clutch shiffting up with a fixed trottle should be feasable. Downshifting may be a tad more difficult with the fixed throttle.

With ground engageing equipment engauged it may get even more difficult both up or down.

 

[Soundguy]

I like my trannies too much to even try to shift a non-synchro on the go. I've got way more better things to do than tear down a tranny in 'x' years when it fialed when i needed it due to years of wear from shifting on the go.

All my tractors can start out in high gear fine..

Soundguy

 

[Normmm]

Maybe shift while the tractor is moving (costing with no load) but never engage the pto while moving. I know (lucky only cost 200 dollars to fix). If you lunch the cluster in most of these tractoes buy another one and use the old one for parts.

 

[SailorBob]

I rarely shift on the go but, once in a while I will downshift from 4th to 3rd gear while mowing when I need to turn a corner. It usually goes right in. If it does not a quick double clutching fixes that. I am sure it is a bad technique i have picked up. I suppose the tranny was not designed for shift on the go. I agree with Soundguy. It will start in all gears. Shifting should not be necessary.

 

[normde2001]

Why would anyone want/need to shift a geardrive Yanmar on the go? I trust the manufacturers to know what they are talking about, and they say, "don't do it".

 

[Jagmandave]

The first couple of days I owned mine, I tried to shift it like a car, only to quickly discover it had a non-synchro trans. Since then, I start in the gear I need, which can be a bit of a pain if I could go faster once I clear the drive or something, but I just deal with it.........I don't want to have to rebuild a tranny either............

 

[oldhippy]

Had to try it. I was rolling along with fixed throttle. Shifted from 2nd to 3rd. Went in smooth as silk. I'm not going to do it again just had to try.

big dan

 

[spyder2]

Having worked on and with the Yanmar a little since my purchase I am forced to revise my opinion on shifting on the go. (Other than the owner manual saying that you shouldn't which is reason enough but not having the benefit of an owners manual I stated an opinion that is incorrect). I cleaned out the filter/screen on my 240D and discovered some metal filings attached to the screen. I was replacing the oil as I have no idea how many hours it had done before me buying it. Someone screwed in the dipstic/plug scew (stripping it in the process - will need to speak to Hoyes) and it made contact with the gears taking off some metal off the dipstick. I removed the unit on top of the gearbox (to which the shift lever is attached) in order to see what was going on and to inspect for any further damage. Although the gears are adequately designed for their intended purpose I was amazed to see how narrow the gears are. The idler gear engaging the final drive in 4th gear High Range (8th gear) has teeth on the side of the gear engaging into similar slots on the side of the final drive gear are really not substantial. You certainly do not want to be doing anything that could potentially remove any more of the bearing surface there. Thus Don't shift on the go!

 

[buppy69]

Wise words.

Eugene