hydraulics on b-hoe attachmnt shut down

[canucklehead]

These are some pics of our backhoe attachment. The PTO powers the pump. There aren't many hours on this unit. My son was extending the hoe and heard a "clicking" sound. He says medium loud. It lasted about 30 seconds and then we couldn't use any of the hydraulic functions for the hoe.

I am a decent backyard mechanic but lost on hydraulics. i checked the resevor and added fluid. Hard to tell if it's that low since most cylinders are exteneded out. I hear no noise at all when he moves any/all of the levers back and forth. No obvious leaks or blow outs anywhere.

So now the tractor sits out in the rain and we can't move a thing. Any suggestions on where to start, or how I can get these cylinders retracted so we can move this into the shop to work on?

where and how do I begin to trouble shoot?

thanks

 

[kennyd]

Start at the pump...Is it turning? Is there a shear pin between it and the PTO coupler? Is the PTO on the tractor working?

Edit:

You can retract the cylinders by operating the appropriate control and lifting the arms or outriggers with a hoist, the releasing the control.

 

[canucklehead]

oops, should have mentioned,the PTO turns fine and seems to be no issue there. I hear no noise for the pump at all, but the tractor is loud.

excellent info on the hydraulic jack to lift the various cylinders. I'll try that.

a 5T floor jack should work fine for that??

will the cylinders remain in after that, or will I need to somehow strap them down so they don't fall back?

does the PTO need to be running, or can we do this as long as we pull the right way on the appropriate lever?

THANKS!

 

[kennyd]

a 5T floor jack should work fine for that??

A 5t jack will work fine-but I was thinking a chain/cable hoist to the ROPS or something else.

will the cylinders remain in after that, or will I need to somehow strap them down so they don't fall back?

The cylinders should hold it up after the valve is closed (neutralized) provided you havent lost any fluid-but strapping is a good safety measure anyway.

does the PTO need to be running, or can we do this as long as we pull the right way on the appropriate lever?

No, it does not need to be running. The fluid will be forced back into the tank just as if it was powered.

Since nothing is working-I still suspect the pump, it's the only real common thing that will keep everything from working. I think the noise he heard was the insides coming apart. Might want to check the tank or filter for metal bits.

 

[canucklehead]

there is no ROPS, here are a couple of pics in better times. maybe I could use the boom with a chain hoist, OR...the winch from my Rhino??

 

[kennyd]

Raise the loader, attach chain from bucket to boom, activate boom lever, lower loader...boom raises.:laughing: Of course the chain will be right at your head!

Use whatever, just plan carefully and think twice-stay safe!

 

[wdchyd]

I agree Kennyd, start at the pump.....the clicking sound could be a bad pto shaft, keyway or hyd pump shaft (snapped internally)

Hard to tell from the pics but is it a Vickers V20 vane pump..??

 

[bindian]

These are some pics of our backhoe attachment. The PTO powers the pump. There aren't many hours on this unit. My son was extending the hoe and heard a "clicking" sound. He says medium loud. It lasted about 30 seconds and then we couldn't use any of the hydraulic functions for the hoe.

I am a decent backyard mechanic but lost on hydraulics. i checked the resevor and added fluid. Hard to tell if it's that low since most cylinders are exteneded out. I hear no noise at all when he moves any/all of the levers back and forth. No obvious leaks or blow outs anywhere.

So now the tractor sits out in the rain and we can't move a thing. Any suggestions on where to start, or how I can get these cylinders retracted so we can move this into the shop to work on?

where and how do I begin to trouble shoot?

thanks

Sounds to me the 30 second sound your son heard was the hydraulic pump eating itself up. You can raise the boom with a hi lift bumper jack then get a come-a-long strapped to either the raised loader or the mid mount for the loader. You will need two people to raise the boom the way KennyD states. One to operate the loader and one to hold the boom lever. Or you can make a stick with a loop of leather on one end to operate backhoe controls from your tractor's seat. Or operate the throttle from you backhoe's seat.
hugs, Brandi

 

[wdchyd]

If it doesn't have a suction strainer it could have swallowed something to jam up the pump and snap the shaft......(wild guess here).....:confused2:

 

[canucklehead]

your replies are all much appreciated. :thumbsup:

I can see the tractor's PTO spin the end where the pump's shaft connects to it. So by PTO shaft, are you referring to the inside of the pump that I can't see? Otherwise, I see te PTO turning freely.

Unfortunately I am inclined to agree that there is something wrong with the pump and that you are most likely right.....that my son was listening to it disintegrate. He usually wears ear protection so what sounded like a "click" over the roar of the engine might have been the sound of it grenading apart.

I'll have to do more research on the pump make/model. Any easy way to look and tell? My neighbour built this backhoe attachment. He's retired and he owned a company that worked on converting heavy equipment into logging equipment. He is a very smart guy and knows his stuff. Unfortunately he's very busy with a big project of his own right now. I really want to get this into a shop so i can take a better look.

So how much will my wallet wail & squeal for a new pump?