JCB 3C11 Back actor play

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topkit
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Re: JCB 3C11 Back actor play

Post #11 by topkit » Sun Jun 19, 2011 5:34 pm

Thanks for that i have found it, is the filling done via the plate at the rear of the kingpost where a pipe goes into the middle of it. Or is there another filling hole.


time travel
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Re: JCB 3C11 Back actor play

Post #12 by time travel » Mon Jun 20, 2011 6:22 am

topkit wrote:Thanks for that i have found it, is the filling done via the plate at the rear of the kingpost where a pipe goes into the middle of it. Or is there another filling hole.


I am doing that also. When I started to take of the plate with the overflow pipe oil started to flow out. I am now going to see if I can get the allen key plug out. I wonder if the oil is that high due to water in the slew actuator?

I had a look at the manual but no clear indication where to fill.

Keen for any answer on the filling.

Thanks
John


steve ball
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Re: JCB 3C11 Back actor play

Post #13 by steve ball » Mon Jun 20, 2011 12:07 pm

On a similar theme .....

I tried to change the actuator oil on my 3CIII last year and was unable to remove the drain plug due to it being badly worn. It looks as though the body of the actuator has been scraping along the ground a lot over the years and there is hardly any depth to the recess on the drain plug on it's outer edge. It's stuck solid!

At the time I was planning to change the seals on the actuator ram anyway so was able to drain the oil when the pots were removed and then tried to syringe out any remaining oil.

It was very difficult trying to remove and then replace the pots. Can anyone advise as to the best way of doing this?


essexpete
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Re: JCB 3C11 Back actor play

Post #14 by essexpete » Mon Jun 20, 2011 2:57 pm

If you need to draw oil out of something the marine world use small hand pumps that are not much more than a modified syringe.


time travel
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Re: JCB 3C11 Back actor play

Post #15 by time travel » Tue Jun 28, 2011 12:32 am

Well I finally was able to remove both plugs.

One was actually scraped so much (back one) that it looked as though it was welded in :-)

About 1.5 lts water (spilled out at once) and about 2lts of oil glug slowly dripped out over a few days. I poured about 500mls of desiel in with a syringe to try and loosen the gluggy oil. Closed the plug for a day and then released it. It loosened the oil a bit but still very slowly dripping out.

I think I will put 4.5Lts HD80-90 in and work it for a few days and then redrain and refill. Oh Once I get the backhoe back working :-)

Any ideas?

thanks
John


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Re: JCB 3C11 Back actor play

Post #16 by essexpete » Tue Jun 28, 2011 7:58 pm

I wonder if you were able to run/use it for a while with ATF, it might disolve the sludge. Anyone else? would it harm the seals?


time travel
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Re: JCB 3C11 Back actor play

Post #17 by time travel » Wed Jun 29, 2011 12:07 pm

essexpete wrote:I wonder if you were able to run/use it for a while with ATF, it might disolve the sludge. Anyone else? would it harm the seals?


I am presuming you mean automatic transmission fluid?


p38dse
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Re: JCB 3C11 Back actor play

Post #18 by p38dse » Thu Sep 10, 2015 10:57 am

TullyveeryClassicJCB wrote:It will more than likely be filled in with mud. Its dead centre on the underside. A 1 inch drive ratchet fits directly into it.


I don't know what you've been telling your wife!!but it a 3/4 inch on mine;)

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Tillywolves
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Re: JCB 3C11 Back actor play

Post #19 by Tillywolves » Wed Sep 07, 2016 9:56 pm

Can anyone tell me if the top plate should be flat. Just removed mine and its full of water. The plate also has two bolts snapped off in the actor, and appears to be bowed. Does the plate fit flush with the slew assembly ?



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