Type 93A backhoe boom cylinder
Type 93A backhoe boom cylinder
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Last edited by KenP on Sat May 25, 2013 8:03 am, edited 1 time in total.
No longer posting on JDCrawlers
Ken
If its anything like a 310 (which think it is) If you have access to a crane or another backhoe choke the cylinder as far up as you can with a strap with the boom as low as you can get it. Then remove the upper boom cylinder pin. Once you do this you retract the cylinder all the way and unhook the lines. Im not sure but if you dig a hole deep enough or have a sutable hill, putting the boom down all the way might give you enough room to get at the fittings without all the lifting hassle.
If its anything like a 310 (which think it is) If you have access to a crane or another backhoe choke the cylinder as far up as you can with a strap with the boom as low as you can get it. Then remove the upper boom cylinder pin. Once you do this you retract the cylinder all the way and unhook the lines. Im not sure but if you dig a hole deep enough or have a sutable hill, putting the boom down all the way might give you enough room to get at the fittings without all the lifting hassle.
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Farmerford
- 40C crawler
- Posts: 23
- Joined: Sat Oct 28, 2006 7:16 am
- Location: Columbus, Georgia
KenP:
I had the same problem on a 9300 backhoe, which I think is similar. It turned out to be much easier than I expected. You are correct about how it works, but here are some details that might be helpful.
Park with the rear hanging over a hill (or back up on blocks or dig a trench) so the boom can drop all the way down (with the dipperstick fully extended).
Support the boom so that the cylinder is almost fully extended
Put a strap on the cylinder as far up into the boom as you can and take the weight off the cylinder base pin.
Push the pin out (mine came out amazingly easily)
Retract the boom cylinder all the way
Disconnect the hoses to the cylinder and plug the cylinder ports with 1/2" pipe plugs and the hoses with 1/2" pipe caps.
The retracted cylinder will now slip out. Mine came close to being blocked by the hydraulic hose bulkhead atop the boom pivot, but I managed to wiggle it by.
With an engine crane (I used a hand lever winch hung from an overhead beam) it should be very easy to line the cylinder base pin bosses up with the pin bosses in the boom when replacing the cylinder.
Good luck
PS: with the boom cylinder out it sure is easy to get to the four hose-to-pipe connections for the dipperstick and bucket cylinders and replace those hoses too.
I had the same problem on a 9300 backhoe, which I think is similar. It turned out to be much easier than I expected. You are correct about how it works, but here are some details that might be helpful.
Park with the rear hanging over a hill (or back up on blocks or dig a trench) so the boom can drop all the way down (with the dipperstick fully extended).
Support the boom so that the cylinder is almost fully extended
Put a strap on the cylinder as far up into the boom as you can and take the weight off the cylinder base pin.
Push the pin out (mine came out amazingly easily)
Retract the boom cylinder all the way
Disconnect the hoses to the cylinder and plug the cylinder ports with 1/2" pipe plugs and the hoses with 1/2" pipe caps.
The retracted cylinder will now slip out. Mine came close to being blocked by the hydraulic hose bulkhead atop the boom pivot, but I managed to wiggle it by.
With an engine crane (I used a hand lever winch hung from an overhead beam) it should be very easy to line the cylinder base pin bosses up with the pin bosses in the boom when replacing the cylinder.
Good luck
PS: with the boom cylinder out it sure is easy to get to the four hose-to-pipe connections for the dipperstick and bucket cylinders and replace those hoses too.
Farmerford
Columbus, Georgia
Columbus, Georgia
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