Another new Yanmar 424 owner

[raymondjunk]

Also as a bit of a follow-up on the issue where the front wheels were not turning in 4wd... after retrieving the 424 from the mud this most recent time, my neighbor remarked that he didn't see my front wheels turning. I quickly checked that I was in 4wd, switched over to 2wd then back to 4wd again, and suddenly the front wheels were turning.
It seems now like maybe I had not pushed the 4wd lever all the way up, or "Slammed" it into 4wd hard enough. I'll explore this more, obviously. Unfortunately, it seems like unless I'm bogged down somewhere or up off the ground entirely, this theory can not be tested.
Anyone else find their transition to 4wd can be finicky?

 

[TnAndy]

Since you mention it has a backhoe, let me ask a couple questions:

1.Is the backhoe unit 3pt hitch mounted ?

2. Do you have the lift in the full up position ? (handle all the way to the rear ? )

THAT might be your issue.

I had a New Holland, and a Bushhog backhoe unit. To mount the backhoe, you removed the normal top link, and there was a welded, fixed top link/bar that stayed on the backhoe. You could lift the backhoe a certain height with the lift control, BUT if you raised the handle all the way back, what was happening was the hydraulics for the 3pt lift were trying to fight a battle it couldn't win....lift an immovable object !....so the pressure relief valve 'may' be what you're hearing screaming !

IF yours mounts that way, try lowering the 3pt lift handle until you see the backhoe drop just slightly.....then you are putting no lift pressure on it. See if that cures your problem.

Because it sounds a whole lot like the same thing I had happen once on my NH HST tractor....the power when to like half of normal, and I drove around for several days before I figured out I'd raised the handle too far while I had the backhoe mounted ( I took mine off and on a lot)

 

[TnAndy]

Also, for what it's worth.....the HST on my New Holland wasn't noisy at all.....but my neighbor has a different model, about the same mid 30hp mine was with HST, and he has a cab on it.

The hydrostatic unit in his is so loud you can't hear yourself think in that cab....I mean I can hear his screaming from a 1/4 mile away when he is using it. I asked him about it, but he said the dealer says it's normal.....well, if it was mine, knowing mine didn't sound anything like that, it would have gone back to the dealer until they fixed it.

 

[Tonyinohio]

Also as a bit of a follow-up on the issue where the front wheels were not turning in 4wd... after retrieving the 424 from the mud this most recent time, my neighbor remarked that he didn't see my front wheels turning. I quickly checked that I was in 4wd, switched over to 2wd then back to 4wd again, and suddenly the front wheels were turning.
It seems now like maybe I had not pushed the 4wd lever all the way up, or "Slammed" it into 4wd hard enough. I'll explore this more, obviously. Unfortunately, it seems like unless I'm bogged down somewhere or up off the ground entirely, this theory can not be tested.
Anyone else find their transition to 4wd can be finicky?

Most likely it just didn't sync. To confirm an earlier question: yes, using the brake pedal along with the F/R pedal is an easy way to send power to the wheel with traction. Works on cars/trucks with an open differential too.

 

[colsonbrooke]

The HST is noise, but every other tractor was to. Even my mowers can be noisy .

When U get stuck. Try locking the break in the first notch. It will cause the rear end to lock together and that should work on getting you out better.

My 4x4 always spins. That sounds like a problem.

For reverse, adjust the set bolt. It will get much faster. Just word of wisdom. After you do that. DON'T come off the pettle to fast . it will make the front end come off the ground.

I also do not like the 1400 rpms. I turned mine down to 800 rpms. It still drivers well especially sence our roads are not the best.

I have had mine 6 months and 200+ hours. It has been a great help and I have not had any major problems.

You just have to remember it is a small tractor. While there are somethings it may do, over working it will prematurely were it out.

 

[raymondjunk]

Since you mention it has a backhoe, let me ask a couple questions:

1.Is the backhoe unit 3pt hitch mounted ?

2. Do you have the lift in the full up position ? (handle all the way to the rear ? )

THAT might be your issue.

I had a New Holland, and a Bushhog backhoe unit. To mount the backhoe, you removed the normal top link, and there was a welded, fixed top link/bar that stayed on the backhoe. You could lift the backhoe a certain height with the lift control, BUT if you raised the handle all the way back, what was happening was the hydraulics for the 3pt lift were trying to fight a battle it couldn't win....lift an immovable object !....so the pressure relief valve 'may' be what you're hearing screaming !

IF yours mounts that way, try lowering the 3pt lift handle until you see the backhoe drop just slightly.....then you are putting no lift pressure on it. See if that cures your problem.

Because it sounds a whole lot like the same thing I had happen once on my NH HST tractor....the power when to like half of normal, and I drove around for several days before I figured out I'd raised the handle too far while I had the backhoe mounted ( I took mine off and on a lot)

Thanks TnAndy.
The way I understand, the backhoe on the 424 is not exactly 3pt mounted. Mine came with a 3pt. hitch in a box, which I'll have to take the backhoe off to install. I've been using the backhoe, so have not yet installed the 3pt. Just to give your suggestion a try, I did crank the 3pt. lever up and down to see if it would affect the sound of the HST, but could not detect a difference.

 

[colsonbrooke]

Also, for what it's worth.....the HST on my New Holland wasn't noisy at all.....but my neighbor has a different model, about the same mid 30hp mine was with HST, and he has a cab on it.

The hydrostatic unit in his is so loud you can't hear yourself think in that cab....I mean I can hear his screaming from a 1/4 mile away when he is using it. I asked him about it, but he said the dealer says it's normal.....well, if it was mine, knowing mine didn't sound anything like that, it would have gone back to the dealer until they fixed it.

I am thinking to nose is not the actual hydro drive unit but the final drive gears. The 2014 Yanmar came with beveled gears and I noted other companies offering beveled final drive. The 2015 came with straight final drive gears.

But what ever it is, my 424 is a champ at pulling. My F-450 fully loaded at 15,900 lbs, when it needs a pull start. My Yanmar has never let me down.

 

[raymondjunk]

The HST is noise, but every other tractor was to. Even my mowers can be noisy .

I'm gradually getting used to the HST. I've operated 3 of these Yanmars and all of them seemed louder than the Deeres & Kubotas I tested out in the same general class.

When U get stuck. Try locking the break in the first notch. It will cause the rear end to lock together and that should work on getting you out better.

I am curious about what you mean by "Locking the brake in the first notch". I didn't think I had notches. And do you mean applying the parking brake?

I also do not like the 1400 rpms. I turned mine down to 800 rpms. It still drivers well especially sence our roads are not the best.

Here's another place you've thrown me for a loop. How did you turn your RPMs down to 800?

 

[raymondjunk]

I am thinking to nose is not the actual hydro drive unit but the final drive gears. The 2014 Yanmar came with beveled gears and I noted other companies offering beveled final drive. The 2015 came with straight final drive gears.

But what ever it is, my 424 is a champ at pulling. My F-450 fully loaded at 15,900 lbs, when it needs a pull start. My Yanmar has never let me down.

Wow. That's pretty impressive.
Is yours a 2015?

 

[colsonbrooke]

Wow. That's pretty impressive.
Is yours a 2015?

I thought the same thing, especially out of 24 hp. Yes it is a 2015. I got it Nov of last year.
Me and a nother guy" he uses bobcats " were impressed how well the 424 scrapes grass off the ground. I was stripping a new area for a building of the turf. It was a 50x100' area. And it I could keep the bucket at 4" to 6" deep, well it would just keep digging , and eventually start pushing the grass over the top of the shovel.