Stone fork has unique crowd action
Stone Fork Has Unique Crowd Action
Stone fork has unique crowd action
Most farmers have to drive over or past stones when ploughing or cultivating. They can't lift them, or carry them to the hedge. Stone picking is an optional extra.
Albert O'Neill uses his front mounted fork, which he fits to the front of his tractor when ploughing, cultivating or rolling. The substantial fork lifts stones of more than a ton, and he uses it to carry them to the hedge.
"I'll be lifting stones the size of a TV set with the machine, and there's no way I could do it without the fork," says Albert, who farms with his parents and brother near Strabane.
Double close coupled rams make this stone picker extra special
This
stone forkstone fork fits on the JCB handler as well as the Wilson front linkage kit on the Ford 8240. The green fitting are for the JCB, and the tractor mountings are in the centre. Albert O'Neill farms with parents and his brother near Strabane, N Ireland, and the area is quite stony. Albert collects stones while ploughing, cultivating and rolling, which means he needs the fork on the front linkage. He needs it as close to the tractor as feasible, to keep the weight on the front axle low - not so necessary when ploughing, but very much so when rolling. He digs and collects the stones while working the field, and dumps them in the hedge. He needs the JCB to collect and load them into a trailer.
His one-of-a-kind top link design means that it closes to around 18 inches and opens to 50, which provides a wide angle of tip on the fork. To get the same angle with a single ram would require the implement to be much further from the front of the tractor.
Albert explains how he calculated the length of ram he needed:
"I put the fork on the front linkage and tipped it down to the angle necessary for digging and prising stones, and measured the top link distance. I then lifted the fork so it was at the correct angle to crowd the stones, and measured how short it would be when closed."
Taking the closed length away from the extended length gave Albert the full length of travel, which he then halved, as the pistons were going in opposite directions.
"The problem is much the same as on a trailer, the closed
ram is less than half the length of the open one. On the trailer they fit a two stage ram, but these can only return by gravity, and I obviously needed something that worked under power in both directions."
The ram was ordered over the internet from Sparex, who list a wide variety of ram sizes.
The rams are fitted back to back on a steel bracket. The piston ends of the rams attach to the top link pins, so the rams are in the centre of the gap. Both need to be securely attached, and Albert decided on three U brackets per ram. The cylinder end has a pin going through a clevis.
Albert wondered briefly about welding the two rams together but decided the cylinders would be likely to bend with the heat, and maybe seals would be damaged as well.
A single ram system would be possible if he were to use a mounting similar to a link box, but the only problem is that the fork would be further from the tractor.
Hydraulics not so difficult
The rams need connecting so they extend together and contract together, and a pair of T blocks are used rigged in tandem.
Conclusion
Local farmers who have seen the machine working are impressed with the way it copes with large stones, and the way it articulates so easily. Picking stones from the field when they are first seen is better than leaving them and hoping they won't damage machinery - the job has definitely reduced the number of big stones around. He finds it sometimes annoying to break off ploughing and run back and collect a boulder, but the effort is worthwhile in terms of fewer machinery breakages.
Any reader interested in having one made for them should contact Mike at Practical Farm Ideas 07778877514
The Pictures
High capacity stone fork is used to dig them out and collect and load
Raised position and the ram is around 18ins long
Open position and the close coupled rams are over 50ins
Close up of ram open, with the hydraulic connections
When closed the ram is little more than 18ins long
Copyright: All articles are copyright Practical Farm Idea Magazine and published on The Farming Forum under licence from the magazine and in agreement with The Farming Forum. Please do not reproduce without permission.
Note From Practical Farm Ideas
If you don't already subscribe to PFI, then you can
And finally if you have a project you have done, that you would like featured in PFI, then please email Mike Donovan at
Most farmers have to drive over or past stones when ploughing or cultivating. They can't lift them, or carry them to the hedge. Stone picking is an optional extra.Albert O'Neill uses his front mounted fork, which he fits to the front of his tractor when ploughing, cultivating or rolling. The substantial fork lifts stones of more than a ton, and he uses it to carry them to the hedge.says Albert, who farms with his parents and brother near Strabane.This stone fork fits on the JCB handler as well as the Wilson front linkage kit on the Ford 8240. The green fitting are for the JCB, and the tractor mountings are in the centre. Albert O'Neill farms with parents and his brother near Strabane, N Ireland, and the area is quite stony. Albert collects stones while ploughing, cultivating and rolling, which means he needs the fork on the front linkage. He needs it as close to the tractor as feasible, to keep the weight on the front axle low - not so necessary when ploughing, but very much so when rolling. He digs and collects the stones while working the field, and dumps them in the hedge. He needs the JCB to collect and load them into a trailer.His one-of-a-kind top link design means that it closes to around 18 inches and opens to 50, which provides a wide angle of tip on the fork. To get the same angle with a single ram would require the implement to be much further from the front of the tractor.Albert explains how he calculated the length of ram he needed:Taking the closed length away from the extended length gave Albert the full length of travel, which he then halved, as the pistons were going in opposite directions.The ram was ordered over the internet from Sparex, who list a wide variety of ram sizes.The rams are fitted back to back on a steel bracket. The piston ends of the rams attach to the top link pins, so the rams are in the centre of the gap. Both need to be securely attached, and Albert decided on three U brackets per ram. The cylinder end has a pin going through a clevis.Albert wondered briefly about welding the two rams together but decided the cylinders would be likely to bend with the heat, and maybe seals would be damaged as well.A single ram system would be possible if he were to use a mounting similar to a link box, but the only problem is that the fork would be further from the tractor.The rams need connecting so they extend together and contract together, and a pair of T blocks are used rigged in tandem.Local farmers who have seen the machine working are impressed with the way it copes with large stones, and the way it articulates so easily. Picking stones from the field when they are first seen is better than leaving them and hoping they won't damage machinery - the job has definitely reduced the number of big stones around. He finds it sometimes annoying to break off ploughing and run back and collect a boulder, but the effort is worthwhile in terms of fewer machinery breakages.Any reader interested in having one made for them should contact Mike at Practical Farm Ideas 07778877514High capacity stone fork is used to dig them out and collect and loadRaised position and the ram is around 18ins longOpen position and the close coupled rams are over 50insClose up of ram open, with the hydraulic connectionsWhen closed the ram is little more than 18ins longIf you don't already subscribe to PFI, then you can Subscribe here for £16.50 a year. However, if you have a specific problem and you wonder if this has already been covered in PFI then you can read a list of all the project covered over the past 20 years in our Index document And finally if you have a project you have done, that you would like featured in PFI, then please email Mike Donovan at
[email protected]
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Most farmers have to drive over or past stones when ploughing or cultivating. They can't lift them, or carry them to the hedge. Stone picking is an optional extra.
Albert O'Neill uses his front mounted fork, which he fits to the front of his tractor when ploughing, cultivating or rolling. The substantial fork lifts stones of more than a ton, and he uses it to carry them to the hedge.
"I'll be lifting stones the size of a TV set with the machine, and there's no way I could do it without the fork," says Albert, who farms with his parents and brother near Strabane.
Double close coupled rams make this stone picker extra special
This stone fork fits on the JCB handler as well as the Wilson front linkage kit on the Ford 8240. The green fitting are for the JCB, and the tractor mountings are in the centre. Albert O'Neill farms with parents and his brother near Strabane, N Ireland, and the area is quite stony. Albert collects stones while ploughing, cultivating and rolling, which means he needs the fork on the front linkage. He needs it as close to the tractor as feasible, to keep the weight on the front axle low - not so necessary when ploughing, but very much so when rolling. He digs and collects the stones while working the field, and dumps them in the hedge. He needs the JCB to collect and load them into a trailer.
His one-of-a-kind top link design means that it closes to around 18 inches and opens to 50, which provides a wide angle of tip on the fork. To get the same angle with a single ram would require the implement to be much further from the front of the tractor.
Albert explains how he calculated the length of ram he needed:
"I put the fork on the front linkage and tipped it down to the angle necessary for digging and prising stones, and measured the top link distance. I then lifted the fork so it was at the correct angle to crowd the stones, and measured how short it would be when closed."
Taking the closed length away from the extended length gave Albert the full length of travel, which he then halved, as the pistons were going in opposite directions.
"The problem is much the same as on a trailer, the closed
ram is less than half the length of the open one. On the trailer they fit a two stage ram, but these can only return by gravity, and I obviously needed something that worked under power in both directions."
The ram was ordered over the internet from Sparex, who list a wide variety of ram sizes.
The rams are fitted back to back on a steel bracket. The piston ends of the rams attach to the top link pins, so the rams are in the centre of the gap. Both need to be securely attached, and Albert decided on three U brackets per ram. The cylinder end has a pin going through a clevis.
Albert wondered briefly about welding the two rams together but decided the cylinders would be likely to bend with the heat, and maybe seals would be damaged as well.
A single ram system would be possible if he were to use a mounting similar to a link box, but the only problem is that the fork would be further from the tractor.
Hydraulics not so difficult
The rams need connecting so they extend together and contract together, and a pair of T blocks are used rigged in tandem.
Conclusion
Local farmers who have seen the machine working are impressed with the way it copes with large stones, and the way it articulates so easily. Picking stones from the field when they are first seen is better than leaving them and hoping they won't damage machinery - the job has definitely reduced the number of big stones around. He finds it sometimes annoying to break off ploughing and run back and collect a boulder, but the effort is worthwhile in terms of fewer machinery breakages.
Any reader interested in having one made for them should contact Mike at Practical Farm Ideas 07778877514
The Pictures
High capacity stone fork is used to dig them out and collect and load
Raised position and the ram is around 18ins long
Open position and the close coupled rams are over 50ins
Close up of ram open, with the hydraulic connections
When closed the ram is little more than 18ins long
Copyright: All articles are copyright Practical Farm Idea Magazine and published on The Farming Forum under licence from the magazine and in agreement with The Farming Forum. Please do not reproduce without permission.
Note From Practical Farm Ideas
If you don't already subscribe to PFI, then you can
And finally if you have a project you have done, that you would like featured in PFI, then please email Mike Donovan at
Belleville washers - Mechanical engineering general ...Most farmers have to drive over or past stones when ploughing or cultivating. They can't lift them, or carry them to the hedge. Stone picking is an optional extra.Albert O'Neill uses his front mounted fork, which he fits to the front of his tractor when ploughing, cultivating or rolling. The substantial fork lifts stones of more than a ton, and he uses it to carry them to the hedge.says Albert, who farms with his parents and brother near Strabane.This stone fork fits on the JCB handler as well as the Wilson front linkage kit on the Ford 8240. The green fitting are for the JCB, and the tractor mountings are in the centre. Albert O'Neill farms with parents and his brother near Strabane, N Ireland, and the area is quite stony. Albert collects stones while ploughing, cultivating and rolling, which means he needs the fork on the front linkage. He needs it as close to the tractor as feasible, to keep the weight on the front axle low - not so necessary when ploughing, but very much so when rolling. He digs and collects the stones while working the field, and dumps them in the hedge. He needs the JCB to collect and load them into a trailer.His one-of-a-kind top link design means that it closes to around 18 inches and opens to 50, which provides a wide angle of tip on the fork. To get the same angle with a single ram would require the implement to be much further from the front of the tractor.Albert explains how he calculated the length of ram he needed:Taking the closed length away from the extended length gave Albert the full length of travel, which he then halved, as the pistons were going in opposite directions.The ram was ordered over the internet from Sparex, who list a wide variety of ram sizes.The rams are fitted back to back on a steel bracket. The piston ends of the rams attach to the top link pins, so the rams are in the centre of the gap. Both need to be securely attached, and Albert decided on three U brackets per ram. The cylinder end has a pin going through a clevis.Albert wondered briefly about welding the two rams together but decided the cylinders would be likely to bend with the heat, and maybe seals would be damaged as well.A single ram system would be possible if he were to use a mounting similar to a link box, but the only problem is that the fork would be further from the tractor.The rams need connecting so they extend together and contract together, and a pair of T blocks are used rigged in tandem.Local farmers who have seen the machine working are impressed with the way it copes with large stones, and the way it articulates so easily. Picking stones from the field when they are first seen is better than leaving them and hoping they won't damage machinery - the job has definitely reduced the number of big stones around. He finds it sometimes annoying to break off ploughing and run back and collect a boulder, but the effort is worthwhile in terms of fewer machinery breakages.Any reader interested in having one made for them should contact Mike at Practical Farm Ideas 07778877514High capacity stone fork is used to dig them out and collect and loadRaised position and the ram is around 18ins longOpen position and the close coupled rams are over 50insClose up of ram open, with the hydraulic connectionsWhen closed the ram is little more than 18ins longIf you don't already subscribe to PFI, then you can Subscribe here for £16.50 a year. However, if you have a specific problem and you wonder if this has already been covered in PFI then you can read a list of all the project covered over the past 20 years in our Index document And finally if you have a project you have done, that you would like featured in PFI, then please email Mike Donovan at
[email protected]
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