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Restoration & Repair Tips Board

Re: J.D. 1010c crawler loader

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Author  [Modern View]

05-24-2014 18:26:23

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The filter would be a good start. If it has a suction filter or has a suction strainer in the tank, either would cause the pump to struggle to supply oil volume.

When the pump struggles to get enough oil, it causes high vacuum on the suction side of the pump, which can cause air to suck in around the pump seal, the filter canister, or any loose connection that may not leak externally, but allow air to enter the pump.

This starts a viscous cycle. Once air is entering the pump, the air contaminated oil is sent through the hydraulic system and back to the tank, only to be picked up by the pump again, this time with air bubbles already in the oil!

I'm assuming there is no doubt about the oil level being correct.

Also inspect the suction side plumbing of the pump. Look for loose fittings, cracked or rubbed lines, bad orings in the pump and the pump shaft seal. Just because it doesn't leak oil, doesn't mean it's not sucking air.

If there have been any modifications to the hydraulic system, that would be a good place to look. Any oil return lines that may have been added can cause problems if there is no down tube inside the tank to keep the returning oil from carrying bubbles into the oil.

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05-25-2014 05:04:38

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 Re: J.D. 1010c crawler loader in reply to Steve@Advance, 05-24-2014 18:26:23  
Thanks guys. I have found the parts list and the breakdown. It is an immense help to be able to see what should be there. Apparently what has happened is the assembly became unscrewed from the cover and dropped. Knowing the problem is half the job. (or more) Now all I have to do is fix it. Thanks again definitely appreciate the assistance.

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05-26-2014 05:27:49

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 Re: J.D. 1010c crawler loader in reply to dogger369, 05-25-2014 05:04:38  
Those filters are almost always off and at the bottom of the tank. With 1010s and 350s. That's because the steel bushing gets lost that goes inside the return filter. Without that bushing - the long bolt cannot be tightened very much without crushing the filter and it quickly falls off.

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