Jack hammer attachment

[wings5j]

Hi to all,
Can someone describe the typical hook-up and operation of a jack-hammer attachment (in my case, my aux hydraulics are operated by my right hand steering lever).
Thanks, John

 

[mrdeere1959]

One problem I see with many non bobcat hyd tools is that most bobcats have a lot of back pressure. To get around this the return line needs to be run direct to tank. Sounds simple but most people never bother to but a filter in this return line. If the tool being run should self-destruct with out a filter the contaminants go right to the pumps. Bobcats filter the oil on the return side not the suction side.

 

[Fishfiles]

John , fisrt thing is to relieve the pressure on the machines quick couplers before trying to hook up the hoses as if there is pressure on the coupler then it will be hard or impossible to push the connector on , you release the pressure by working your steering lever right and left a couple of times , you should also relieve the pressure before disconnecting the attachment , be aware that if the person who removed the attachment last didn't relieve the pressure then pressure can be stored in the attachment and it will be hard to make the connection sometimes you will have to crack open the hose fitting at the quick coupler to relieve the pressure so it will snap together easily --------------------- another thing to tell you is the detent feature of the aux lever ( this locks the aux on ) should not be used when using a hammer , you should only engage the aux when the hammer point is making contact with the concrete , the trem is dry hit when you apply the pressure and the hammer hits with out anything to abosrb the force , dry hitting will shorten the life of the hammer --------------grease the fitting on the hammer every 4 hours of operation , but don't over grease it 5 pumps is enough , depending on hammer there could be 1 , 2 or 3 nitrogen chambers , the hammer will not give you maximum performance if the nitrogen is not to the proper charge pressure , some tell tale signs of low charge pressure are , a machine gun type sound and not much penetration into the concrete or a slow ,tap , tap , tap , another is when you see the hoses violently jumping around , and improperly charged hammer won't have nearly as much production as one that is , in other words it may take 4 hours to do what could be done in 30 minutes , one more thing to say is that if you hit in one spot for 30 to 45 seconds and don't see any penetration happening there reset the hammer and try again don't let it set there in one spot for 2 minutes straight ------------good luck

 

[wings5j]

John , fisrt thing is to relieve the pressure on the machines quick couplers before trying to hook up the hoses as if there is pressure on the coupler then it will be hard or impossible to push the connector on , you release the pressure by working your steering lever right and left a couple of times , you should also relieve the pressure before disconnecting the attachment , be aware that if the person who removed the attachment last didn't relieve the pressure then pressure can be stored in the attachment and it will be hard to make the connection sometimes you will have to crack open the hose fitting at the quick coupler to relieve the pressure so it will snap together easily --------------------- another thing to tell you is the detent feature of the aux lever ( this locks the aux on ) should not be used when using a hammer , you should only engage the aux when the hammer point is making contact with the concrete , the trem is dry hit when you apply the pressure and the hammer hits with out anything to abosrb the force , dry hitting will shorten the life of the hammer --------------grease the fitting on the hammer every 4 hours of operation , but don't over grease it 5 pumps is enough , depending on hammer there could be 1 , 2 or 3 nitrogen chambers , the hammer will not give you maximum performance if the nitrogen is not to the proper charge pressure , some tell tale signs of low charge pressure are , a machine gun type sound and not much penetration into the concrete or a slow ,tap , tap , tap , another is when you see the hoses violently jumping around , and improperly charged hammer won't have nearly as much production as one that is , in other words it may take 4 hours to do what could be done in 30 minutes , one more thing to say is that if you hit in one spot for 30 to 45 seconds and don't see any penetration happening there reset the hammer and try again don't let it set there in one spot for 2 minutes straight ------------good luck

Thanks for the good run-down. I don't have any plans for running a jack-hammer but had someone else ask me about it. Hopefully they have some comparable experience with a jack-hammer to relate it to use on a Bobcat.
John