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Ford 9N, 2N & 8N Discussion Forum

NAA hydraulic noise??

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11-29-2003 09:20:26

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When I start the tractor and let 'er warm up I can hear the hyd pump making a whining sound. I checked fluid and it's up. What would cause 'er to be making a whine in the pump when Im not even using the hyd?

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11-30-2003 08:50:37

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 Re: NAA hydraulic noise?? in reply to Roger, 11-29-2003 09:20:26  
The NAA series tractors and the first hundred series tractors had a "vane" pump. This is a very good pump when it is new but is short lived compared to the later piston pumps.

The vane pump usually will make a noise especially when the oil is cold and thick or if the pump is badly worn and about to die.

It is expensive to replace the vane pump with the piston pump or to repair the vane pump.

I am making a kit to use a belt driven pump to replace the gear driven pump that was original to the Ford tractors up to about 65. You can't use a proofmeter with my set up because the it is driven from the back of the original pump and mine is not made to accomodate the drive. Lot's cheaper than any other replacement.

Email me for more information if interested.


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11-29-2003 11:32:17

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 Re: NAA hydraulic noise?? in reply to Roger, 11-29-2003 09:20:26  
Like MikeOh points out.. the NAA has live hyds. Make sure it isn't loosing its prime and spinning dry for those first few minutes while trying to 'prime' up. As soon as you start.. run the lift up and down.. if it works. its got oil and hasn't lost its prime.


Also, I believe the older vane pump was adjustable flow rate while the newer piston pump is not.


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Mike OH

11-29-2003 11:07:56

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 Re: NAA hydraulic noise?? in reply to Roger, 11-29-2003 09:20:26  
Roger - The hydraulic pump on the Jubilee unlike the 8N pump is external and gear driven. It is running every time the engine is running. I suspect the noise you are hearing is do to tolerances opening up as parts wear and more noticeable as the oil warms up. I wouldn't worry about it too much as long as it is still working satisfactorily. May be indicating signs of a future rebuild.

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