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  #1  
Old 07-15-2013, 05:44 PM
bean1974 bean1974 is offline
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Unhappy 1641 hydro gear pump
hi guys.Can a 1641 hydro gear pump be rebuilt.My cub wont move.When I first start it it moves. once it warms up it whines and wont move.Please help.Im a new member.tks guys
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  #2  
Old 07-15-2013, 05:57 PM
J-Mech J-Mech is offline
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First, Glad to have you!

Have you changed the fluid and filter in this machine? Hydro pumps and gears rarely fail. What about the relief valves..... have you ruled them out? Will it not move in either direction? Is the fluid level ok? Lets start with all that.
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Old 07-15-2013, 08:37 PM
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^^^ yup agreed. start with the simple and easy. these pumps are pretty much bullet proof.
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Old 07-15-2013, 08:47 PM
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Originally Posted by bean1974 View Post
hi guys.Can a 1641 hydro gear pump be rebuilt.My cub wont move.When I first start it it moves. once it warms up it whines and wont move.Please help.Im a new member.tks guys
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  #5  
Old 07-15-2013, 10:16 PM
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Welcome to OCC! Good luck with your cub.
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Old 07-15-2013, 10:38 PM
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Diz Jr. Diz Jr. is offline
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I agree, with the others. If it were damaged to the point of needing repair i don't think it would move at all, anytime.
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Old 07-15-2013, 10:43 PM
rweaver rweaver is offline
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the hydrogear pumps have a problem I remember some time back a dealer called me looking for a pump for mtd they needed one to fix somebodys tractor but do as suggested change oil and filter and see if that helps sometimes that's all that needed if not then your pump needs replaced and I think new ones are nla
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Old 07-16-2013, 12:22 AM
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The relief is external of the pump. Make sure that the lever you pull up on to move the tractor is not keeping it from working. You will have to look under it to see how it works.
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Old 07-17-2013, 08:17 PM
bean1974 bean1974 is offline
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Default 1641 hydro gear
did everything u guys said. no luck.wont move at all.tks guys gonna convert it to a sunstran rear.cool guy I talked to on this site said it would work. tks all very much
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Old 07-17-2013, 08:49 PM
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Sam Mac Sam Mac is offline
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did everything u guys said. no luck.wont move at all.tks guys gonna convert it to a sunstran rear.cool guy I talked to on this site said it would work. tks all very much
Yep you can probably put a Sundstrand in it but you will need to address a couple issues. 1 drive shaft 2 hydraulic lines 3 linkage 4 front mounts.

Did you check to see if the charge pump is bad on the Hydro Gear?
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