Need help D4 7U13292 hydraulics

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Ron

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I had a hydraulic cylinder rebuilt on D4 7U.
Cat has not ran in a couple years.
I cannot get the blade to lift up now, after I replaced cylinder.
Hydraulic fluid is full.
Any help will be appreciated!

Thanks,
Ron
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Sun, Oct 28, 2018 3:27 AM

CatManMark

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Have you checked the rest of the hydraulic system? Pump/valves/controls?

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Sun, Oct 28, 2018 4:54 AM

cojhl2

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Reply to CatManMark:

Have you checked the rest of the hydraulic system? Pump/valves/controls?

Ron, can you hear any hydraulic noise when pump is running and a direction valve moved.

Did this work albeit poorly before you worked on the cyls?

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Sun, Oct 28, 2018 5:32 AM

Ron

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Reply to CatManMark:

Have you checked the rest of the hydraulic system? Pump/valves/controls?

I guess that is part of my question. Where do I start first and how do I check it?

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Sun, Oct 28, 2018 5:44 AM

Ron

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Reply to Ron:

I guess that is part of my question. Where do I start first and how do I check it?

It is not making any noise when I move the lever. When it was cold in 20’s very slow at first until warm.

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Sun, Oct 28, 2018 6:10 AM

CatManMark

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Reply to Ron:

It is not making any noise when I move the lever. When it was cold in 20’s very slow at first until warm.

Check you pump for pressure and oil flow first and work your way back.

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Sun, Oct 28, 2018 6:17 AM

nomorejohndeere

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Reply to CatManMark:

Check you pump for pressure and oil flow first and work your way back.

were ya moving the lever the right way?

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Sun, Oct 28, 2018 6:26 AM

Old Magnet

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Reply to nomorejohndeere:

were ya moving the lever the right way?

What weight oil are you using? If it's to thick nothing will happen when cold.

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Sun, Oct 28, 2018 6:34 AM

caterpillar13

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Reply to Old Magnet:

What weight oil are you using? If it's to thick nothing will happen when cold.

you may have a broken pump shaft, that happened on my D2 5U.

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Sun, Oct 28, 2018 7:13 AM

Chuck C

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Reply to caterpillar13:

you may have a broken pump shaft, that happened on my D2 5U.

Try checking the hoses. Make sure they are hooked up right.
Chuck C

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Sun, Oct 28, 2018 7:24 AM

Ron

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Reply to Chuck C:

Try checking the hoses. Make sure they are hooked up right.
Chuck C

Here is a picture of the fluid I use.
Temperature outside is around 50 degrees.
Could I crack a hydraulic line and see if I can get air out of it?

Thanks!
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