[Beartooth15]

Just to acquired a 1980 case 406. I will post pics once i get them loaded. My question for the group is as follows. The unit came with a Schmidt snow blower on the front and counter weight on the rear deck. The blower weights 2000# per the manual. The counter weight on the deck is a 5'x4'x 16" cement block with two steel suitcase style weights welded to the side. If my math is close, the cement block is roughly 3600# and the two suitcase weights are 550# each. So roughly 4500-4600# was on the deck. The deck is useless with this large lump on it. It took two of my 150hp tractors to remove it. Note safe to say the least. I plan on farming with the unit during the summer and blowing snow for the winter. I have ordered MPT 81 tires to replace the Michelin X on there now. If I move the counter weight to the rear hanger, I would assume the 4600# will be way to much. I plan on making a new hanger and using Suitcase weights so that it will be easier, safer and adjustable. I dont know the front weight on the front wheels assuming motor and blower is X. The rear wheels weighing less now without the counter weight. Any help is appreciated. Secondly, I have a hydro. rake, made by Vermeer. Per the Manual, I believe I have two pressure lines and one return at the back. My rake requires two sets of remotes to run but only requiring 6-8lbs. Will those pressure lines work and can I run a second return. I can plumb in a constant pressure valve as needed. Thank you in Advance for your replies and help. Doug

 

[ACAD_Cowboy]

Well the amount of counter weight needed to counter the 907kg blower should be 907kg if you sling it the same distance from the center of mass as the blower is.

From some digging, the listed distance from the nose to center line of axle is 990mm and doing some math we can figure about 730mm from the tail to center line of axle.
Unimog U900

Torque = force X distance so 907kg force at .990m is 8805.69 newton per meter.
Force = torque/distance so 8805.69 newton per meter / .730m is 12062.6 newtons
Distance = torque/force so 8805.69 newton per meter / 12062.6 newtons is .7299m

So 12062.6 newtons converts to 2711.78 pound force or 2711.78 pounds discounting any local changes in gravity.

Clear? Well it can be assumed that Schmidt knew what they were doing with they fit the blower to the truck. A Schmidt K3 weighs ~995 pounds but sits pretty far forward needs 3000lb of tail weight. The Schmidt MF3 at 1349 but a wee bit closer to the truck needs the same 3000lb.

Von may be a very helpful source of info depending on which which blower you have fitted.

http://www.benzworld.org/forums/unimog/1420510-scans-case-implements.html
http://vonsmog.com/unimog_brochures.html
www.benzworld.org/forums/attachments/unimog/226631d1236573362-case-unimog-406-study-406study.pdf
http://s272261875.websitehome.co.uk/gal251981502/TINGY/Site/A_second_page.html

 

[Beartooth15]

Thank you for the quick reply. The Schmidt Blower I have is an S5.1. My question of counter weight is two fold. One, I wish to maintain proper ballast when mounting the blower and two to make it more fuctional and user friendly. My question of concern comes from the manual that came with the unit. It states that if the Unimog does not come with a dump box which could be loaded with material of choice, then a 4000# counter weight can be supplied. Material in the dump box should be approximately 2000#. My question being of concern that the difference in their statement is 2000#. One ton of weight difference is alot. Thus, the mounting points on my 406 are almost spot on in the front compared to the rear mounting hooks/frame. I hate to reinvent the wheel as I know there are many on here that are smarter and have already figured this weight out. Again, Thank you and I look forward to asking alot of questions and only improving this machine.

Doug

 

[ACAD_Cowboy]

Well the Case machines nearly always came with a Case implement deck and not the tipper body. Thus your fears are pretty grounded, a bare 406/Case is plenty nose heavy. Add to it the blower and schmidt plate and it gets worse. But 2000lb in a tipper body is roughly the same distance from center line of the front axle as the blower is, adding in the spider frame, the tipper body, the cylinder and all the fluid & lines. Likely okay for low speed use. With the blower unclipped you will probably want more weight on the back as it is to calm the truck down.

Trev has some experience with suitcase weights and adapting farmer technology, perhaps he can get in on this.

 

[bwswede]

The weight I see some people add with their home-made concoctions is too much if all you want to do is maintain the same balance on the truck as it is empty when using a blower. If a person wants to add weight to get better traction then that is another story.

It is real simple. When taking the moment around the front axle with a blower that weighs 2000 pounds and has a mass that is say centered 3 feet in front of the axle develops of torque of 6000 foot pounds at the axle. A counter weight at the rear of the truck that is say 9 feet behind the front axle needs 1/3 that weight, or just 666 pounds to balance the load. I am just guessing at the distances so the figures need to be adjusted to actual conditions.

I run a lighter blower but further in front of the axle than the example. I keep a 750 pound Farmi winch on the rear 3 point and nothing on the Case deck and it works fine.

BWSwede

 

[tkv000]

I'm not math good at but here's some threads on counterweights:

http://www.benzworld.org/forums/unimog/1666677-our-mogs-work-22.html

http://www.benzworld.org/forums/11262522-post218.html

http://www.benzworld.org/forums/unimog/1352775-case-mb94-4-counter-weight-attachment.html

http://www.benzworld.org/forums/unimog/1534039-photos-counter-weight-anybody.html

 

[tkv000]

Another option, rather than hang the suitcase weights off the CASE deck hooks, would be to aquire a CASE 3pt hitch:

And then make a weight rack that is 3pt mountable, this is mine (also my CASE 3pt hitch above ):

This allows you to quick on/off the entire weight rack, use it on multiple machines (I use mine on my Massey as well for FEL work and traction when pulling tree's, makes a huge difference on a 2wd tractor) and the suitcase weights are great as they are adjustable, I have 15 @ 74lbs ea plus the cast iron weight rack and I-beam, I'm around 1400-1500lbs total weight, but I adjust it depending on use. Total cost was a few bottles of my neighbors favorite brew as it was all scrap at his place.

 

[VON]

Here is another idea for some extra weight on the CASE truck, this was on one that I parted out not too long ago. In fact I still have the weights for sale if anyone is interested! And if they needed more weight I guess they would drop the hunk of cast iron into the angle iron frame welded to the 4" of plate steel!

 

[rostige]

If I may throw in my 2 cents into this conversation. The S5 on a 406 appears to be an unlikely combo. I know because I have one and it is a heavy MF'er. It typically was fitted on the heavy series such as 425.121 (U1300) 425.141 (U1500)..U1700, U1800-U2400 etc. and U500. I guess the PTO would turn it but I think it would require at least 130 HP to go through any kind of depth that the S5 would handle. To my knowledge the S3 or similar is the blower that was spec'd for 406/416 etc. Hope that helps you.

 

[Flint.54]

I have an S3.1 on the front of my 406 and it is heavy enough. My counter weight was to replace the plywood of my tipper bed with 1" plate. It helped, but not as much as if I had weight on the 3pt hitch. That however isn't an option for my because I carry a 2 ton salt spreader in the back. If I could keep it full of salt and not spread it, that would be about right for weight.

 

[Beartooth15]

Thanks guys for the reply's. I have been very busy thus tardy in replying. I have all summer to get this done but want to focus on it now as that will be here very soon and I am starting to farm right now. I would love to have a case 3 pt hitch if anyone knows of one. That would be ideal. I agree that the S5 is most likely to big for the 406 but that is what I have. I thought about building or adding a dump box or slide in dump box to the deck. Multi use and I can take on and off. I can add gravel for winter weight as well. I could build a rack for the suitcase weights but after material and weights, a dump box of sorts may cost the same and be more practical. Second question was the hydro. I have one set of ports on the rear. Can I T in to the other set up front to give me a second set in the rear. My hay rake requires two. The more I play and tinker with this machine, the more I get excited. It is simply awesome.

 

[tkv000]

Some CASE dump bed idea's:

http://www.benzworld.org/forums/unimog/1435133-case-deck-dump-bodies.html

how many levers on the steering column do you have? Factory options for the U900 in the rear is 2 ports (1 spool) 4 ports (two spools), and 1 high flow return. The CASE might be different or there might be options I'm not aware of. I plan on running 4 ports (two spools) to the rear myself.

 

[Beartooth15]

tkv000, Those are great pics and pretty much what I want to do. My thoughts on adaptability was to mount a similar dump box that is self contained. Similar to my dump trailer. Thus, I could remove and slide on my boomless sprayer which too I could put on a skid frame. I have two levers on the column. Four ports on the front and two on the rears. Looks like a highflow return on the rear as well. Looking at the hydrolic map or schematic, It looks like I could tie in to the other at the front and run them to the rear.

 

[tkv000]

You bet, couple of 90's and some hoses, quick couplers and you are off to the races. (ignore the powerlift, no rear 3pt on yours)

Check out britbikes implementation here