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  #1   IP: 78.151.195.213
Old 02-01-2019, 01:39 PM
Atlas404 Atlas404 is offline
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Join Date: Jan 2017
Posts: 2
Default Slow digger rams

Hello folks, hoping some hydraulic experts on here can help me with my 1998 atlas 404 mini digger. It has 2360hrs on the clock and overall works and tracks fine with plenty of power.

Here a pic of the old beast!



The only thing bothering me with it is the speed of the dipper and bucket rams is rather slow, still plenty of power but slower than the boom. I have had the bucket and dipper rams rebuilt with new seals and no change. I have also tried swapping the hoses over under the floor of the machine so that the boom service was on the dipper service and the dipper ram still moves slowly, which to me just leaves the hoses?

So i removed some hoses today and noticed that every ram has a different sise hose diameter at one end from the other, iím guessing this is wrong and restricting the flow?

Here are some pics of my findings







Could this be the route of my problems? I think the big hoses are 3/8 and small 1/4

Cheers
Greg
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  #2   IP: 78.145.10.216
Old 03-01-2019, 01:27 PM
Atlas404 Atlas404 is offline
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Default Re: Slow digger rams

Changed small diameter hose on the dipper today and still the same
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  #3   IP: 5.70.73.194
Old 04-01-2019, 11:09 AM
digger man digger man is offline
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Default Re: Slow digger rams

Hi,

You mite have more luck posting on www.planttalk.co.uk , this is where people have moved to......
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  #4   IP: 82.69.69.187
Old 04-01-2019, 06:22 PM
Uffex1900 Uffex1900 is offline
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Posts: 37
Default Re: Slow digger rams

Good day
When you say it is slow have you timed the cylinder with full engine speed?
Arm in cylinder out often has the possibility to increase the flow many machines have some form of restriction on the negative side of the cylinder that may be a smaller hose on your machine. Suggest you begin with timing the cylinder Atlas should be able to tell you what the time should be.
Kind regards
Uffex
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