Water in standard trans hydro fluid

kaze

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Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
Broken shift boot left go over the winter. Dummy found the tractor and brought it home. Ideas for removing and flushing the hyd system Shift boot ordered. Was thinking of draining the fluid and heating it till the water evaporates and using that fluid to flush the system New boot and screen ordered runs everything works But a redhead in disguise. Hood B7100 frame B7001 but price was good. If the bearings in the trans are not rusted.
 

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Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
3,784
296
83
Williamstown Ontario Canada
Broken shift boot left go over the winter. Dummy found the tractor and brought it home. Ideas for removing and flushing the hyd system Shift boot ordered. Was thinking of draining the fluid and heating it till the water evaporates and using that fluid to flush the system New boot and screen ordered runs everything works But a redhead in disguise. Hood B7100 frame B7001 but price was good. If the bearings in the trans are not rusted.
I think you are mistaken about you not having a true B7100

The forum guru North Idaho Wolfman has said previously:

ALL B7100's had B7001 in front of the serial number.

If it is a manual transmission model, don't mess with the old fluid as there is much more than water to be concerned about.

Use cheapest new fluid to flush and then good stuff.

Dave
 

Magicman

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Equipment
M4900 Utility Special 4WD e/w FEL & 1530 John Deere "Traveling Man"
Oct 8, 2019
2,002
757
113
77
Brookhaven, MS
knotholesawmill.com
You should be able to bring it up to operating temperature, drain, replace filter(?) and refill with new oil. Any residual moisture should be no more than normal temperature change condensation and evaporate with usage.
 

kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
I thank everyone for the information. Why someone would not spend $5 dollars to prevent this is beyond me. Just worried about the bearing; do not know how long they left this go but will say it is to the top of the dipstick pull that out and it overlows sitting not running.
Joe
 

kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
You should be able to bring it up to operating temperature, drain, replace filter(?) and refill with new oil. Any residual moisture should be no more than normal temperature change condensation and evaporate with usage.
Yes I can remember the young and dumb part of life and like you older now.
 

kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
Yes I can still remember those young and dumb days of life.
Now I too am older
now seeing what I purchased and knew the problem
you can understand the rest. May not have gotten a ham for a hot dog this time. lol
 

kaze

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Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
This old girl is like me run hard and put away wet too many times
Had to take the side screen off to change the over size aftermarket oil filter. the brace on the muffler bots rusted bad it has been on there a while. same with the fuel filter bowl and air cleaner marked 08 01?
 

Dave_eng

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Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
3,784
296
83
Williamstown Ontario Canada
If you have not already done so go to this site and download the B5100, 6100 & 7100 operators manual.

Manual

It will show you on page 20 that the trans has two drain plugs.

It will also show you the transmission/hydraulic filter-screen that needs to be at least cleaned and possibly replaced.

Dave
 

Chesapeake

New member

Equipment
B6100
Apr 1, 2021
15
4
3
Washington
My 6100 had milk in it on purchase. Ripped shift boot.
I also needed to replace the 3-point piston o-ring. When I had the piston out I could see that the push rod and linkage was rusty, but the gears and everything lower in the tranny looked pristine.
I scrubbed off as much rust as I could reach with a brush. Then I cleaned it all well and sprayed it with WD40 specialist corrosion inhibitor. I then removed the 3-point top link bracket to get to the tranny vent plug. I pulled that and sprayed WD corrosion inhibitor in there all over.
I then drained the tyranny, pulled and cleaned the filter. Then plugged it back up and filled it with cheap hydraulic fluid. Let it set over night, then drove it around a bit, ran the PTO through the speeds(no load), and cycled the 3-point several times just standing on the arms for weight.
Then I drained and the oil was less milky, but still not good.
I then filled it again and will run through the same exercise.
I expect I’ll need to do 3 drains and fills.
After the summer I plan to pull the 3-point mechanism off the tranny and clean up any rust.
It seems the rust is only in the top above the oil where condensation would form.
 

GreensvilleJay

Well-known member

Equipment
BX23-S
Apr 2, 2019
2,147
370
83
Greensville,Ontario,Canada
re: Why someone would not spend $5 dollars to prevent this is beyond me.

Could be he always stored it in a garage ? My BX23S is in a garage, so I've saved $5.......
When you do go to drain it, leave it sit for 3 days draining(week is better..). Had a JD with TT40 in it, bench drained the HST,' most of it', then put paper towel under it, overnight ,towels were saturated with oil, did it again for a 3rd day. Surpirised me how long it took oil to weeeeep it's way out of the HST.
If you can put tractor in the hot sun, more oil will eventually come out....
 

kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
If you have not already done so go to this site and download the B5100, 6100 & 7100 operators manual.

Manual

It will show you on page 20 that the trans has two drain plugs.

It will also show you the transmission/hydraulic filter-screen that needs to be at least cleaned and possibly replaced.

Dave
Thank you drain plugs on the two rear axle covers and will look for that third one on the mid take off case. that may be covered by the main support beam for the front plow it has a full lower support from the rear case to the plow.
If you have not already done so go to this site and download the B5100, 6100 & 7100 operators manual.

Manual

It will show you on page 20 that the trans has two drain plugs.

It will also show you the transmission/hydraulic filter-screen that needs to be at least cleaned and possibly replaced.

Dave
Thank you for the information and for pointing me to the manuals. Parts boot screen and seals should be here today I feel for the engine it has a aftermarket oil filter on it that could not be removed without removing the side cover. Bolts rusted tight waiting for penetrating oil to work on them.
 

Steve Neul

Member

Equipment
B5200
Jun 3, 2017
104
10
18
Terrell, TX
Broken shift boot left go over the winter. Dummy found the tractor and brought it home. Ideas for removing and flushing the hyd system Shift boot ordered. Was thinking of draining the fluid and heating it till the water evaporates and using that fluid to flush the system New boot and screen ordered runs everything works But a redhead in disguise. Hood B7100 frame B7001 but price was good. If the bearings in the trans are not rusted.
Heating the fluid will damage it. It's better to freeze it and then pour off the oil. The water will stay as a block in the container.
 
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kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
Thank you for the information I am going the easy way but will try that and see how it goes. But will have to do it in quarts just have the fridge freezer lol Found out it is a true B7100 even with the frame marked b7001. Parts got here Boot on trans drained and engine oil as well Going to flush with tractor supply fluid and then put in a new screen in the line. Joe
 

kaze

Member
Premium Member

Equipment
Kubota B7000 Cub Cadet 1782 Cub Cadet 78D York Three point rake Woods RM 400 mo
The shift knob removal wrap a bar rag around the knob Big channel locks and turn the knob Once it turns you can turn it again while pulling up on it and it slides off No threads