davis backhoe

[skidsteer.ca]

Ken, I did use top links and mounted them as you would the trailer ball set-up except that both ends have a swivel. When they are on it is very solid and you don't have to have everything perfect before connecting due to the adjuster.

Jerry
Take some pics and put them up here so other can see the setup. Imo this is so much simpler then the factory setup and easily transfered to other makes of loaders.
Ken

 

[jerry]

Jerry
Take some pics and put them up here so other can see the setup. Imo this is so much simpler then the factory setup and easily transfered to other makes of loaders.
Ken

Ken, I will do that as soon as it dries up enough and I can properly abuse the machine like we always do to see if this mount will hold up. Ever since the frost went out in this red clay we have had enough rain to make to soft to get around. Jerry

 

[JD8875]

Ken, I will do that as soon as it dries up enough and I can properly abuse the machine like we always do to see if this mount will hold up. Ever since the frost went out in this red clay we have had enough rain to make to soft to get around. Jerry

Sorry I haven't been around in a while. Thay are keeping me too busy at work. I'll see if my "secretary" wife can pull the invoice from Swan and get the part numbers. In talking with the guys from Case about that machine if you have one Lan Tex Cylinder then all of the boom and stick cylinders are Lan Tex and they are all the same. Another interesting thing about these little machines I learned the hard way is they have two relief valves built into the inside of the swing cylinder. You have to totally dismantle it to find them. The poppets in these are prone to snap off on the stem and then the free flow fluid makes it nearly inpossible to control the swing function. Its easily remedied by taking the valve apart, deburring the poppet and then screw it back together as tight as possible. Case priced the valve at $260 each for me when mine went toes up last week. John

 

[jerry]

Sorry I haven't been around in a while. Thay are keeping me too busy at work. I'll see if my "secretary" wife can pull the invoice from Swan and get the part numbers. In talking with the guys from Case about that machine if you have one Lan Tex Cylinder then all of the boom and stick cylinders are Lan Tex and they are all the same. Another interesting thing about these little machines I learned the hard way is they have two relief valves built into the inside of the swing cylinder. You have to totally dismantle it to find them. The poppets in these are prone to snap off on the stem and then the free flow fluid makes it nearly inpossible to control the swing function. Its easily remedied by taking the valve apart, deburring the poppet and then screw it back together as tight as possible. Case priced the valve at $260 each for me when mine went toes up last week. John

Thanks John, I looked at mine tonight and in the port of the swing cylinder there is a type of fitting/adapter that the tube line attaches too so I guess that poppet relief or restrictor is in there. Is that all you have to do to get it out is remove the tube and fitting? Did you ever get a book on your backhoe? I would like to get one if they are available. Jerry

 

[Earthwerks Unlimited]

Thanks John, I looked at mine tonight and in the port of the swing cylinder there is a type of fitting/adapter that the tube line attaches too so I guess that poppet relief or restrictor is in there. Is that all you have to do to get it out is remove the tube and fitting? Did you ever get a book on your backhoe? I would like to get one if they are available. Jerry

I just sold my '80 General backhoe loader that had a 12' hoe on it. General was owned by the son of the owner of Davis Machinery/Trencher. While I could dig 10' down, as far as digging stumps, well, it can and did. But as far as using it on a bobcat, you won't have the down pressure you need unless you install rear downriggers. And you may find you have to get the hoe nearly right over the stump to pull it up--otherwise, it will drag you into the hole since you don't or can't keep the machine from sliding. With a backhoe loader you can use the front bucket to dig into the ground to keep from sliding backward or forward. Also, the swing system on mine used a double chain on a double-ended single cylinder. Crappy design--it kept breaking the chain yokes which are used on forkilift mast lift chains--cost $475 each new---and there are 4 on it! If all you are doing is digging stumps, just use pallet forks---I have dug stumps so big my New Holland LS185.b could not lift them (rated at 5,500lb.).

 

[jerry]

I just sold my '80 General backhoe loader that had a 12' hoe on it. General was owned by the son of the owner of Davis Machinery/Trencher. While I could dig 10' down, as far as digging stumps, well, it can and did. But as far as using it on a bobcat, you won't have the down pressure you need unless you install rear downriggers. And you may find you have to get the hoe nearly right over the stump to pull it up--otherwise, it will drag you into the hole since you don't or can't keep the machine from sliding. With a backhoe loader you can use the front bucket to dig into the ground to keep from sliding backward or forward. Also, the swing system on mine used a double chain on a double-ended single cylinder. Crappy design--it kept breaking the chain yokes which are used on forkilift mast lift chains--cost $475 each new---and there are 4 on it! If all you are doing is digging stumps, just use pallet forks---I have dug stumps so big my New Holland LS185.b could not lift them (rated at 5,500lb.).

I will have to agree with the pallet fork usage. I have one fork 7 inches wide and 4 feet long mounted solid on a attachment plate and it works great for stumps and hard ground. You can stab it in around the stump and shear off a lot of the roots also.

 

[theboogers]

I will have to agree with the pallet fork usage. I have one fork 7 inches wide and 4 feet long mounted solid on a attachment plate and it works great for stumps and hard ground. You can stab it in around the stump and shear off a lot of the roots also.

i just got a davis backhoe ane posted some questions. http://www.skidsteerforum.com/DesktopDefault.aspx?tabid=54&frmView=ShowPost&PostID=14864 i saw you info about the needle valve and was wondering if 1/4" thread size is correct. wouldn't you want a valve to fit the hose attaching to the quick diconnect. where would you put the needle valve? also would there be a suggestion of a drainoff valve to relieve the pressure release i am having with the 763. thanks

 

[jerry]

i just got a davis backhoe ane posted some questions. http://www.skidsteerforum.com/DesktopDefault.aspx?tabid=54&frmView=ShowPost&PostID=14864 i saw you info about the needle valve and was wondering if 1/4" thread size is correct. wouldn't you want a valve to fit the hose attaching to the quick diconnect. where would you put the needle valve? also would there be a suggestion of a drainoff valve to relieve the pressure release i am having with the 763. thanks

Hi, the pressure problem I am sure others more familiar with your machine can solve otherwise they do make a tool for depressing the ball and bleeding the quick couplers. I did have too fast a swing on the backhoe even at a idle so today I looked into it. They had hooked up the swing hoses to the boom valve and vice-versa, I guess they liked that style control better but behind the jic to o ring adapter fitting in the valve body there is a brass orifice washer. The ones in the boom valve had a much larger hole than the one in the swing valve and one was not even in there. I made a new orifice and put the hoses back where they belong and it is better now. The orifices in the swing valve have a 1/8 hole in them , I may make new ones with a 3/32 or 1/16 inch hole to slow it down more if needed.

 

[theboogers]

Hi, the pressure problem I am sure others more familiar with your machine can solve otherwise they do make a tool for depressing the ball and bleeding the quick couplers. I did have too fast a swing on the backhoe even at a idle so today I looked into it. They had hooked up the swing hoses to the boom valve and vice-versa, I guess they liked that style control better but behind the jic to o ring adapter fitting in the valve body there is a brass orifice washer. The ones in the boom valve had a much larger hole than the one in the swing valve and one was not even in there. I made a new orifice and put the hoses back where they belong and it is better now. The orifices in the swing valve have a 1/8 hole in them , I may make new ones with a 3/32 or 1/16 inch hole to slow it down more if needed.

thanks for the input, especially about the needle valve. would you put the needle valve on the main line to the attachment, or on the line that just swings the backhoe. if you put a valve on the main line to the attachment which line on the bobcat flows to the attachment the top or bottom hydraulic line?

 

[sterlclan]

thanks for the input, especially about the needle valve. would you put the needle valve on the main line to the attachment, or on the line that just swings the backhoe. if you put a valve on the main line to the attachment which line on the bobcat flows to the attachment the top or bottom hydraulic line?

you would restrict the swing hoses the oil flows out in both directions depending on witch way you move the control....if you are having trouble getting the couplers to hook try moving the control as you shut the machine off and some machines have a switch I believe it is in the key to relive pressure as well.....Jeff

 

[theboogers]

you would restrict the swing hoses the oil flows out in both directions depending on witch way you move the control....if you are having trouble getting the couplers to hook try moving the control as you shut the machine off and some machines have a switch I believe it is in the key to relive pressure as well.....Jeff

i tried to relieve the pressure several ways for a long time by holding the key to the left immediately after shut off. still had trouble until i loosened the flange nut on the bobcat at the quick disconnect. i was wondering if there was a relay or something to relieve the pressure when the key is turned to the left for drain down. thanks

 

[bremery]

i tried to relieve the pressure several ways for a long time by holding the key to the left immediately after shut off. still had trouble until i loosened the flange nut on the bobcat at the quick disconnect. i was wondering if there was a relay or something to relieve the pressure when the key is turned to the left for drain down. thanks

JD8875, Did you ever get a chance to get those part numbers for the cylinder seals?

 

[TheMEGAbobcatman]

i tried to relieve the pressure several ways for a long time by holding the key to the left immediately after shut off. still had trouble until i loosened the flange nut on the bobcat at the quick disconnect. i was wondering if there was a relay or something to relieve the pressure when the key is turned to the left for drain down. thanks

Hi, I'm woundering if it possible to use a pallet frok attachment for a bobcat to dig a trench, because I bought this 553 and I'm woundering if I can just slide the forks together on the rail and dig a trench with it, instead of buying a backhoe attachment, thanks.

 

[Tazza]

Hi, I'm woundering if it possible to use a pallet frok attachment for a bobcat to dig a trench, because I bought this 553 and I'm woundering if I can just slide the forks together on the rail and dig a trench with it, instead of buying a backhoe attachment, thanks.

If your dirt is soft enough, i see its possible, but you will still have to move the dirt you scoop up. With an excivator attachment you can scoop it up, then turn it to the side to dump, saves a LOT of work.