clinter36
Bronze Member
Hello All,
Its been a while since I have been on here. Still have my L4850 and it continues to be a champ!
I have an L5412 backhoe that uses the 4 pt frame mount system. Its about 30 years old and I was recently using it pretty hard when the boom cylinder started to leak, so I decided to give it some all around love.
Its been rumored that this unit is a Bradco 11HD, and I will confirm that I have in fact purchased pins and other bits, straight from the 11HD parts manual (Ford Dist.) It clearly was built by Bradco based on the construction of the boom, etc. Now, having to dig a little deeper for parts - specifically a seal kit for the swing cylinder, I realize that this unit is not an 11HD. There are some significant differences in the size and construction of the swing cylinder along with hydraulic lines to and on the boom. You can also see that there are some differences in the main frame assembly from the 11HD, most notably the 11HD does not have an oil cooler w/welded housing under the seat.
I spoke with a Bradco/Paladin tech and then sent him the serial number of the backhoe plus the number stamped on the swing cylinder. He said the unit was mirrored off the 11MD2 and emailed me the parts sheet from that, but there are vast differences on this machine as well. The swing cylinder is clearly not the same, the hydraulics are not the same. He does not really have an answer as the Kubota parts numbers do not cross to the part number that he has... so oddly enough the manufacturer of the unit is a dead end of sorts.
My guess is that this unit was designed specifically for Kubota and probably used some of the existing pieces that Bradco had, such as the boom and dipper weldments.... but I would like to see if the collective brain power out there has any more specific knowledge. And why doesn't Bradco have the parts diagrams....
Aside from general info on this machine, the other important question I have is in regard to the swing cylinder. I pulled the swing cylinder out because it has side to side play and the play is coming from inside the hydraulic cylinder (this is the type of cylinder where the rod ends are fixed and the cylinder itself moves back and forth). A local hydraulic shop told me that its probably a leaking seal on the center "puck" that is causing fluid to escape from the right side to the left side causing the play. However, after disassembling the cylinder, there is a puck in the center of the two cylinder rods, BUT the puck has a little side to side play. This is a bit baffling because the puck appears to be welded to the rods, but apparently its not. My guess would be that the puck must be held on to the rods with a C-clip that is hidden under the seal, but that doesn't really make sense because fluid would leak past.... The kubota parts diagram does not show much detail and just lists a seal and O-ring. Anyone have any ideas here ?? A few pics attached. I have a short little video of the play in the puck but I can't post it here.
A seal kit for the cylinder is on order from Kubota, but I didn't want to start digging at the old seal until I actually have the new one in hand... some of these parts are becoming scarce.
Thanks
clint
![IMG_3756[1].JPG](https://www.tractorbynet.com/forums/data/attachments/569/569500-8bd72087ec4b701bbb808aa1e4146652.jpg "IMG_3756[1].JPG")
![IMG_3788[1].JPG](https://www.tractorbynet.com/forums/data/attachments/569/569514-0147cc2c6abeabe1e4159cde6969a450.jpg "IMG_3788[1].JPG")
![IMG_3786[1].JPG](https://www.tractorbynet.com/forums/data/attachments/569/569536-8e2fef96079b46dbba35175542364e33.jpg "IMG_3786[1].JPG")
Its been a while since I have been on here. Still have my L4850 and it continues to be a champ!
I have an L5412 backhoe that uses the 4 pt frame mount system. Its about 30 years old and I was recently using it pretty hard when the boom cylinder started to leak, so I decided to give it some all around love.
Its been rumored that this unit is a Bradco 11HD, and I will confirm that I have in fact purchased pins and other bits, straight from the 11HD parts manual (Ford Dist.) It clearly was built by Bradco based on the construction of the boom, etc. Now, having to dig a little deeper for parts - specifically a seal kit for the swing cylinder, I realize that this unit is not an 11HD. There are some significant differences in the size and construction of the swing cylinder along with hydraulic lines to and on the boom. You can also see that there are some differences in the main frame assembly from the 11HD, most notably the 11HD does not have an oil cooler w/welded housing under the seat.
I spoke with a Bradco/Paladin tech and then sent him the serial number of the backhoe plus the number stamped on the swing cylinder. He said the unit was mirrored off the 11MD2 and emailed me the parts sheet from that, but there are vast differences on this machine as well. The swing cylinder is clearly not the same, the hydraulics are not the same. He does not really have an answer as the Kubota parts numbers do not cross to the part number that he has... so oddly enough the manufacturer of the unit is a dead end of sorts.
My guess is that this unit was designed specifically for Kubota and probably used some of the existing pieces that Bradco had, such as the boom and dipper weldments.... but I would like to see if the collective brain power out there has any more specific knowledge. And why doesn't Bradco have the parts diagrams....
Aside from general info on this machine, the other important question I have is in regard to the swing cylinder. I pulled the swing cylinder out because it has side to side play and the play is coming from inside the hydraulic cylinder (this is the type of cylinder where the rod ends are fixed and the cylinder itself moves back and forth). A local hydraulic shop told me that its probably a leaking seal on the center "puck" that is causing fluid to escape from the right side to the left side causing the play. However, after disassembling the cylinder, there is a puck in the center of the two cylinder rods, BUT the puck has a little side to side play. This is a bit baffling because the puck appears to be welded to the rods, but apparently its not. My guess would be that the puck must be held on to the rods with a C-clip that is hidden under the seal, but that doesn't really make sense because fluid would leak past.... The kubota parts diagram does not show much detail and just lists a seal and O-ring. Anyone have any ideas here ?? A few pics attached. I have a short little video of the play in the puck but I can't post it here.
A seal kit for the cylinder is on order from Kubota, but I didn't want to start digging at the old seal until I actually have the new one in hand... some of these parts are becoming scarce.
Thanks
clint
