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NAA
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Hydraulics weak after engine warmup

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Ryan Gunther (UT)

01-10-2000 11:04:57




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54 NAA has good hydraulic pressure when I start it up, and lifts my Rhino Blade fine, but once the engine warms up the blade slowly goes down. I'm no master when it comes to hydaulics, but I have caught wind of it being the pump. Is that my problem? Is there a better pump for it? Will a different weight of hydraulic fluid help any? Thank you for all your help. You guys have always given me good direction.
Thank you.

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Ernie D

01-10-2000 18:42:31




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 Re: NAA - Hydraulics weak after engine warmup in reply to Ryan Gunther (UT), 01-10-2000 11:04:57  
You have two problems.
Bad vane pump, works cold, not hot. Toss it and put a piston pump on.
Internal leak, probably cylinder, see what its like after you replace pump.



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Leon Kasdorf

01-10-2000 13:47:24




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 Re: NAA - Hydraulics weak after engine warmup in reply to Ryan Gunther (UT), 01-10-2000 11:04:57  
I would strongly recomend the J&D video on rebuilding your lift cover. I used it when I rebuilt mine (Ford 650), and I would have been lost if I had to rely on the paper manuals.

These guys really get to the heart of what the most likely failures are, and they show how to fix things with normal tools. My lift cover went back together perfectly.

Well worth the money, IMHO.



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StraitShooter

01-10-2000 12:44:18




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 Re: NAA - Hydraulics weak after engine warmup in reply to Ryan Gunther (UT), 01-10-2000 11:04:57  
Ryan,
You say that the blade slowly goes down. Do you mean on it's own? If so, it sounds to me like you might have a problem in the lift cyl. piston leaking. Although, if it leaks, (sometimes evident by a bobbing action) the position control cam (internal) should compensate for lift. It could also be in the check valve circut. I recently changed all my fluids and it did help with performance. Generally, if there is a problem with the pump you would experience slow / poor or no lift. Falling implements aren't usually affected by pump performance. Do you have an I & T Shop service manual (found at Tractor Supply Center) for your tractor? These manuals have good troubleshooting info in them and are full of useful information. They get into detail on the hydraulics on this tractor.

StraitShooter

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