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Discussion Starter #1 (Edited)
I need to start off with a big :thanku: to stladrill & wally2q as I would never have attempted such an undertaking with out the encouragement of stladrill and his coaching me through this. So thankfully along with his help and also borrowing the experience from his and wally2q's threads on their K46 work previously, I'm a very happy tractor owner again following the "operation" on my 2003 JD L120 with just under 300 hours on it.

The problem I had with the tractor was the loss of power to get up even the smallest of inclines after about a half hour of mowing and I knew the tranny was going south on me. Prompted by stladrill, a buddy of mine and I dropped the transmission and changed fluid, but to my disappointment I only realized an approximate 20-25% increase in power. With that told to stladrill he wisely recommend I purchase some parts from Tuff Torque and by doing so would have a practically new transmission. So I ordered the recommended parts which included a new filter, cylinder block motor, cylinder block pump, and a tube of sealant at a cost of $152.57 + tax and shipping. Also purchased 2 quarts of Castrol Syntec 5W50 oil for $14.40.

My buddy and I dropped the transmission again, cracked open the case and replaced the parts indicated in the pics, put her back together and installed, did the purging procedure and I swear this tractor now runs better than it did up the steepest of my back yard inclines like they were not even there :).

Total time on this was 4 hours start to finish with no breaks. I have to admit we were a little concerned as there was one small pin that came out when we removed the cylinder block pump and took us probably a half hour to finally figure where this thing went and how it fit correctley back into the pump. After doing so, it was apparent this tiny pin was what allowed the free wheel lever to operate correctly :fing20:. Overall the repair was not really that bad, it was just being extremely careful in paying attention to details and maneuvering the pieces back into the case right and in the correct configuration. I had intended to take step by step pics, but working with this in oil covered hands and constantly wiping them, made it impossible to try to keep grabbing the camera. We simply documented the opening of the transmission and then took shots at all angles to insure a proper put back together and it all worked out fine :fing32:.
If I can get another 7 years out of this fix, I'll be ready to trade her by then anyway, but right now, I'm real real pleased with her :trink40:

Again my Thanks to stladrill & wally2q :trink39:

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Glad everything went well. Was there no gasket only sealant?
 

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Jim, I just bought a X300. Do you know if this is the same transmission that's in mine? I thought I read somewhere on here that it is.
 

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Do you know if this is the same transmission that's in mine?
It is.




X300/42X (2010)

Engine

Power 17 hp (12.7 kW)*

*Engine hp is provided by engine mfr. for comparison purposes. Actual operating hp will be less. ---

Displacement 28.8 cu in. (472 cc)

Manufacturer Kawasaki

Cylinders V-twin, cast-iron liners

Type OHV, oil filter

Charging System 15 amp regulated

Battery 195 cold-crank amps

Choke/Speed Control Separate levers

Fuel Tank Capacity 3.3 U.S. gallon

Transmission

Type K46 automatic

Control Twin Touch pedals

Cruise Control Standard

Forward Speed 0-5.5 mph

Reverse Speed 0-4.0 mph
 

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Jim, I just bought a X300. Do you know if this is the same transmission that's in mine? I thought I read somewhere on here that it is.

it is a k-46 family tranny, but probably a different sub model number. you have k46a-like bb or so, close to a couple dozen different sub models.
 

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Discussion Starter #8
it is a k-46 family tranny, but probably a different sub model number. you have k46a-like bb or so, close to a couple dozen different sub models.
:ditto: Mine is the K46AC, there should be a tag on the rear axles, ( mine was on the right side ), which will have the model # and serial # of your transmission.
 

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I've read a lot of bad things about this transmission, but if this fixes them then I'm not worried about it. Seems like a pretty simple repair to me!
 

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My 09 X300 has a K46BR hst. The TT site lists about 15 K46 versions, not all are Deere specific.
 

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Yep you gotta get into them a bit to fix things. My next task is going to be to pull the cylinders and valves and see if my engine needs more than just a new set of rings (starting to smoke a little).
 

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Good starting/maint. project-Jim--and I know yoou are happy!!

:fing32:
 

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Congratulations on a successful job. Kudos for tackling it and pulling it off successfully!
 

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Good to know that they can be fixed. I'm a little over 200 hours on mine now. Still working fine yet knock on wood. Now I know who to pester when the time comes. :fing32:
 

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Discussion Starter #17
Good to know that they can be fixed. I'm a little over 200 hours on mine now. Still working fine yet knock on wood. Now I know who to pester when the time comes. :fing32:

Yea, stladrill and wally2q will walk you right through it :D .


J/K, hopefully you'll be ok for a long time Mark, but if not, we will be around :fing32:.
 

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Funny that the dealerships won't touch them when they are having problems however we had somebody right there accomplish it! Maybe we can make the fix instructions a sticky.
 

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Your welcome Jim, I'm glad I could help, I know you could do it.:fing02:
 

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Discussion Starter #20
Few pics I got of the old motor and old pump, they are identical, just one is smaller than the other. Just cylinders and springs. Actually don't know why one is called a motor and one is called a pump, but thats part of the hydrostatic workings mystery I guess :).


 
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