FX series parts availbility

[jimmer2880]

I've had the 48" bucket on my koyker 80 loader fully loaded with stacked firewood. After I added air to the front tires she handled the load pretty well. I did have a scraper blade on the rear for counter weight. But, the rear end was pretty light.

I may end up having to move my front axle forward in the spring to accomodate new to me tires (whomever put the MMM on before I owned it, put smaller rear's on, so I'm fixing it, but when I do, I dont' think the MMM will still fit, so I'll have to move the front axle forward a couple inches).

After looking at it quite a bit, I think it'll be a relatively easy move. Since the frame doesn't go past the flywheel, I'm probably going to move the entire frame forward, drill some new holes, weld 6 pieces of angle for radiator mount and skin mounts and cut off the front bumper & re-weld. Of course, need to get the drive shaft "stretched", and the sleeve that covers it.

After all of that, it should help the front axle loading a bit also.

 

[tallyho8]

One of the problems with the F series and possibly some others is the short wheelbase. Way too much weight transfer from the bucket on to the front axle.

I thought that the shorter the wheelbase, the more weight transfer from the bucket to the rear axle. Am I wrong?

 

[jimmer2880]

The short wb weight transfer is like a lever, with the front wheels being the pivot, or axis.

If the load is 3' in front of the axis, and the rear wheels are 3' behind the axis, for every 1 lb of weight in the bucket, the rear wheels will have 1lb less weight, and the axis will see 2 additional lbs.

If the bucket was only 1' in front of the front wheels and the rears were 3' behind the wheels, there would be much less weight transfer from the rear wheels to the front wheels.

Adding weight to a bucket in front of the front wheels will NEVER add weight to the rear wheels.

 

[tallyho8]

The short wb weight transfer is like a lever, with the front wheels being the pivot, or axis. If the load is 3' in front of the axis, and the rear wheels are 3' behind the axis, for every 1 lb of weight in the bucket, the rear wheels will have 1lb less weight, and the axis will see 2 additional lbs. If the bucket was only 1' in front of the front wheels and the rears were 3' behind the wheels, there would be much less weight transfer from the rear wheels to the front wheels. Adding weight to a bucket in front of the front wheels will NEVER add weight to the rear wheels.

Thanks for the clarification. I understand that there will be less weight transfer to the front wheels if the bucket is closer to the tractors front wheels.

What I don't understand yet is: Given, If the load is 3' in front of the axis, and the rear wheels are 3' behind the axis, for every 1 lb of weight in the bucket, the rear wheels will have 1lb less weight, and the axis will see 2 additional lbs. Then if it has a longer wheelbase, and the rear wheels are 6' behind the axis, for every 1 lb of weight in the bucket, the rear wheels will have ? lb less weight, and the axis will see ? additional lbs.

Is moving the wheelbase further back actually going to reduce the weight on the axis?

I don't think so but it's been a long time since I got out of school and I have forgotten much of my 3Rs.

 

[Mickey_Fx]

Good simple explanation Jimmer. So happens with my rig, the distance from the front axle to the bucket is the same distance from the front axle to the rear axle. It would help if the bucket was closer to the front axle. A month or two ago someone posted a pic of their tractor with a bucket I didn't reccognize and had the bucket tucked in real close to the front of the tractor. A lot nicer for weight transfer considerations.

I worked up a small spreadsheet to do the calc but one has to weigh their rig, both front and rear axles independently to do the math.

Tallyho, not sure if I'm following you due to not knowing for sure your meaning of a couple words. The weight doesn't change but the balance between the front and rear axles change. Think of this like a titer-toter. A weight is placed on end A and as you add weight to end B, end A appears lighter and as you add weight, at some point the end a will be off the ground. The weight on end B depends upon where the pivot point is located. At some point the loads will balance an all the weight is born at the pivot point. If end A has a weight of 10# placed on it and the pivot point is in the middle, when 10# is placed on end B, they will be in balance and the pivot point will see the full 20#.

 

[runningbird]

I think the brand of loader you are referring to is FREY. they are out of Canada and make a real nice loader. unfortunately they do not make hardware to fit our yanmar tractors. some people are however making there own brackets.

 

[California]

Is moving the wheelbase further back actually going to reduce the weight on the axis?

Think of it this way - imagine the tractor weight staying constant regardless of a changeable wheelbase. On a short wheelbase rig it's easy to lift the rear tires off the ground as the bucket goes up. When that happens 100% of the overall weight is on the front axle.

Then imagine taking the same weight that is normally on the rear tires and moving it back. For this imaginary longer tractor with the same overall weight, the rear tires would still be bearing some weight and the back of the tractor wouldn't leave the ground. Since the pressure on the ground is shared between front and rear tires, the weight on the front axle has to be less. Clear as mud?

 

[jimmer2880]

......Is moving the wheelbase further back actually going to reduce the weight on the axis?

I don't think so but it's been a long time since I got out of school and I have forgotten much of my 3Rs.

Moving the rear wheels back will only have a small amt of effect on the front axis weight (since the wheels tend to be heavy). However, I wasn't talking about moving the rears back, rather moving the front's closer to the bucket. On the F series tractors, the rears are about as far back as they could possibly go. However, the front axle is also BACK about as far as it could possibly go. Because of that, the FEL can only be so close to the bucket and still be able to clear the front bumper, hood, etc.

Of course, one nice feature of having the front axle so far towards the rear, is the super tight turning radius we have