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  #1  
Old 07-21-2009, 12:03 PM
8ncub 8ncub is offline
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Location: PA
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Default 1641 hydro no go
hello another new guy here. proud owner of 2 cubs 104 and 1641. like both.I live in south west pa.this is first time in a forum.
now my problem. the 1641 had a fuel problem. pulled the hydro release and towed it 100 feet to garage. fixed wire for fuel solenoid. engine starts and runs ok. but it will not move. mower will not lift. hydro is full.no noise no resistance when move shift lever.drained fluid checked filter looks ok.relief valve moves free.
any help would be appreciated.
thanks 8ncub
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  #2  
Old 07-21-2009, 12:11 PM
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RPalmer RPalmer is offline
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8ncub,

Welcome. I'm sure you will enjoy it here. Lots of good people.

I can't help you with your hydro problem. But comapring it to my 129 ... it don't sound good. Best of luck with it.
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  #3  
Old 07-23-2009, 12:08 AM
murphycc
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I've not owned or worked on a 1641 but IIRR it has a somewhat funky pump on it. If it has fluid, nothing is clogged and linkages are operating, then clearly there is a failure in the pump it's self. Yeah ain't sound'n good. Keep an eye out for a $50 used one.

Scott
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  #4  
Old 07-23-2009, 08:11 AM
R Bedell R Bedell is offline
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8ncub:

First, let me say I have NO experience with this model.

The transmission is made by Hydro Gear.

I have read your post and basing it on a similar issue with the Sundstrand, this is my observation.


When you pulled the Hydro Release Lever, it had to engage some valve on the transmission, I suspect it is item C on the attached image. I suspect this ByPass Valve is stuck. Perhaps, removing this valve and checking it out for foreign debris, and/or free moving capabilities of the internal parts, might bear you some fruit.

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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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  #5  
Old 07-23-2009, 11:12 AM
8ncub 8ncub is offline
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Default 1641 hydro no go update
thanks for the replies. I removed relief valve, looked ok.changed fluid and filter.all looked clean.lubed valve and o ring. still no go.talked to guy at cub dealer .no help. not looking good. not giving up yet. I will dig deeper
thanks again 8ncub
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  #6  
Old 07-23-2009, 01:57 PM
R Bedell R Bedell is offline
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If the transmission worked OK before you applied the Hydro Release Lever, then in my world, what ever that lever engaged, is the prime suspect.
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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

[SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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  #7  
Old 07-29-2009, 08:52 AM
8ncub 8ncub is offline
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Default 1641 no go
thanks for replies. hydro gear info gives me better understanding of unit. went to their web site . removed relief valve again.looks ok. I agree problem most likely has something to do with this circuit or charge pump relief valve.maybe towing caused hydro motor to pushsomething back into valve and keeping it open. I have to go work on my 104 mow deck broke spindles. check back later. 8ncub
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  #8  
Old 08-17-2009, 11:26 AM
8ncub 8ncub is offline
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finally got back to the hydro.I took seat and fender off and degreased tractor. disassembled charge pump looks ok. reassembled. poured fluid in suction side and pressured fluid came out pressure side.hooked up all lines, found a port on pump under suction line connection. removed plug and installed a hose and funnel poured in fluid started engine,poured more fluid,lifted mower deck, did this several times, now every thing works ok.previously I tried the method found at hydro gear site and it did not work.I think when I used the hydro relief valve and left it in relief position a couple of days the fluid all drained down causing loss of prime. this was quite a learning experience but all worked out ok. thanks for your input.
8ncub
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