Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Three points hitch: mast adjustement on ASAE S217.12
- Thread starter pietro82
- Start date
IceStationZebra
Mechanical
I saw that there is a reference to ISO 730-1:1994 so I looked at that. Appears that they are identical - so that doesn't help.
What I think they are trying to state is the minimum lower hitch points that the +/-5° mast inclination range can be measured at.
- Low point: Note that the "Mast adjustment height, lowest position" is the same as the "lower hitch point." Looking at a CAT-I this means that you must to have the ability to adjust mast inclination at least +/-5° at 200mm above the gound. If you can still get +/-5° at a lower point its gravy. Realize that due to the geometry, the lower you go the harder it is going to be to get the +/-5° range.
- High point: Again looking at CAT-I, you must have the ability to adjust mast inclination at least +/-5° with the "lower hitch point" at 508mm or more above the gound. And similarly, due to the geometry the higher you go the harder it is going to be to get the +/-5° range. The geometry is designed to kick the rear of the implement up at the high lift range to facilitate transport of long implements (i.e. plows).
ISZ
What I think they are trying to state is the minimum lower hitch points that the +/-5° mast inclination range can be measured at.
- Low point: Note that the "Mast adjustment height, lowest position" is the same as the "lower hitch point." Looking at a CAT-I this means that you must to have the ability to adjust mast inclination at least +/-5° at 200mm above the gound. If you can still get +/-5° at a lower point its gravy. Realize that due to the geometry, the lower you go the harder it is going to be to get the +/-5° range.
- High point: Again looking at CAT-I, you must have the ability to adjust mast inclination at least +/-5° with the "lower hitch point" at 508mm or more above the gound. And similarly, due to the geometry the higher you go the harder it is going to be to get the +/-5° range. The geometry is designed to kick the rear of the implement up at the high lift range to facilitate transport of long implements (i.e. plows).
ISZ
- Thread starter
- #3
- Thread starter
- #5
IceStationZebra
Mechanical
"ASABE Standards, Engineering Practices, and Data are informational and advisory only. Their use by anyone engaged in industry or trade is entirely voluntary. The ASABE assumes no responsibility for results attrib-utable to the application of ASABE Standards, Engineering Practices, and Data. Conformity does not ensure compliance with applicable ordinances, laws and regulations. Prospective users are responsible for protecting themselves against liability for infringement of patents."
The SAE, ASAE nor ISO can make standards a requirement. Realize that all of these organizations use people in the respective industries to come up with the standards that they will use. What this basically means is that there is very little outside oversight, unless it concerns the public good. (automobile crash regulations, engine emissions, etc.)
This is where homologation comes in. What you need to do is find out if the country where you want to sell your equipment makes them mandatory. Individual governments can make them mandatory, or go above and beyond!
The EU is a prime example. There are the "directives" that cover any machine sold in the EU. A few of the main ones are:
DIRECTIVE 2006/42/EC - machinery directive
DIRECTIVE 2005/88/EC - noise directive
DIRECTIVE 2002/44/EC - vibration directive
DIRECTIVE 74/151/EEC - tractor directive
In theory these are all you have to meet, but in reality some countries go beyond this, often contradicting ISO standards and directives. Italy is a good example of this. If you are going into Europe I would strongly suggest getting a company like TUV involved.
And then there are countries like the USA where standards may not be required by law, but if someone gets injured and you don't follow the "voluntary" safety standards you will loose a lot of money in court cases.
ISZ
The SAE, ASAE nor ISO can make standards a requirement. Realize that all of these organizations use people in the respective industries to come up with the standards that they will use. What this basically means is that there is very little outside oversight, unless it concerns the public good. (automobile crash regulations, engine emissions, etc.)
This is where homologation comes in. What you need to do is find out if the country where you want to sell your equipment makes them mandatory. Individual governments can make them mandatory, or go above and beyond!
The EU is a prime example. There are the "directives" that cover any machine sold in the EU. A few of the main ones are:
DIRECTIVE 2006/42/EC - machinery directive
DIRECTIVE 2005/88/EC - noise directive
DIRECTIVE 2002/44/EC - vibration directive
DIRECTIVE 74/151/EEC - tractor directive
In theory these are all you have to meet, but in reality some countries go beyond this, often contradicting ISO standards and directives. Italy is a good example of this. If you are going into Europe I would strongly suggest getting a company like TUV involved.
And then there are countries like the USA where standards may not be required by law, but if someone gets injured and you don't follow the "voluntary" safety standards you will loose a lot of money in court cases.
ISZ
- Thread starter
- #7
Hi IceStationZebra,
thanks for your reply. I got it. In the directive you have mentioned, any ISO standard isn't mentioned about the three point hitch, but few companies in their tractor datasheet write the three point hitch category, so it should mean the most of them don't follow any standard, right?
Best regards
Pietro
thanks for your reply. I got it. In the directive you have mentioned, any ISO standard isn't mentioned about the three point hitch, but few companies in their tractor datasheet write the three point hitch category, so it should mean the most of them don't follow any standard, right?
Best regards
Pietro
IceStationZebra
Mechanical
It would help a lot if you told me which country or countries you are interested in. They probably don't mention it because it has been the standard so long that it is assumed, but as far as I know all the large tractor manufacturers in Europe, Australia and Americas follow the 3pt standard.
In reality it is probably tough to meet all the 3pt requirements considering all the other options and tire choices that are offered in the various markets. I wouldn't be surprised if they cut corners a little, but you would have to measure very carefully to find out.
ISZ
In reality it is probably tough to meet all the 3pt requirements considering all the other options and tire choices that are offered in the various markets. I wouldn't be surprised if they cut corners a little, but you would have to measure very carefully to find out.
ISZ
- Thread starter
- #9
IceStationZebra
Mechanical
What do you mean by radius index? ISZ
- Thread starter
- #11
IceStationZebra
Mechanical
OK, you are talking about the tire rolling radius. I have never been involved with the homologation of a tractor, but my assumption is that you would have to take whatever the worst case is for the size of tires offered. Some aspects of homologation will be worse off with tall tires, others with short ones. This is what I had to do for a articulated loaders.
You also have to consider other options. Will you see different performance with a "quick hitch"? What about two wheel drive vs. MFWD, claw vs. ball ends, 540 vs. 1000 rpm PTO, etc. Some tractors have multiple holes for the top link, meant to increase the tipping action with long implements like plows. Many tractor chassis also come with different classes of 3 pt. hitches, depending on the power. For example, it is very common in North America to find tractors with class 3 and 4 narrow.
ISZ
You also have to consider other options. Will you see different performance with a "quick hitch"? What about two wheel drive vs. MFWD, claw vs. ball ends, 540 vs. 1000 rpm PTO, etc. Some tractors have multiple holes for the top link, meant to increase the tipping action with long implements like plows. Many tractor chassis also come with different classes of 3 pt. hitches, depending on the power. For example, it is very common in North America to find tractors with class 3 and 4 narrow.
ISZ
- Thread starter
- #13
IceStationZebra
Mechanical
The rolling radius will only change for different tire configurations (size, brand, ply/radial, mpa, wear, duals, etc.). There of course will be minute changes due to gross vehicle weight differences, but they will be minor. And if you are taking measurements will real tires, you will have to account for variations amoung tires, even of the same brand & model. (and it can be significant)
My comment about the different configurations is that you will have to review if, for example, the pin center for attaching the implement to the lower arms moves between configurations. Different tire configurations will alter the pitch of the tractor. Some tractors have both 540 and 1000 rpm PTO shafts, at slightly different heights.
As far as tipping action goes, I am specifically talking about how the geometry tips the implement forward as it is raised. If you have a long implement like a 6 bottom plow you may want to increase the tipping action to increase road clearance for the last bottom during transport.
ISZ
My comment about the different configurations is that you will have to review if, for example, the pin center for attaching the implement to the lower arms moves between configurations. Different tire configurations will alter the pitch of the tractor. Some tractors have both 540 and 1000 rpm PTO shafts, at slightly different heights.
As far as tipping action goes, I am specifically talking about how the geometry tips the implement forward as it is raised. If you have a long implement like a 6 bottom plow you may want to increase the tipping action to increase road clearance for the last bottom during transport.
ISZ
- Thread starter
- #15
IceStationZebra
Mechanical
It appears mainly so they could introduce the idea of adjustable lift rods. ISZ
- Thread starter
- #17
IceStationZebra
Mechanical
I wouldn't be surprised if there were a few tractors without, but the vast majority have had at least one adjustable rod. But what I was really getting at is that to define adjustable lift rods you first have to define what a lift rod is.
ISZ
ISZ
- Thread starter
- #19
IceStationZebra
Mechanical
I think the main reason for adjustable lift rods is so you have some adjustment when plowing with one wheel in the furrow. I have never used it for any other reason. I guess you would probably use it on any implement that is nonsymetrical.
ISZ
ISZ
- Status
Similar threads
- Question
- Locked
- Question