Rtv x1120DD not moving

[Ohio_Pawpaw_Grower]

I have an 1120D and I am taking copious notes!!!! I am actually following most of this. What a great site.

 

[Gotmyrtvmike]

first check the easy stuff.... put it in neutral on a flat surface and see it it rolls easy? if it does then the brakes arent seized. in order for it to move in gear the hst speed lever must travel free and not spin on the shaft...not so common but check anyway. while your back there check the high pressure relief poppet to make sure it releases and resets properly. might lube it and cycle it a few times also. check these things and check back??? please? jack up the rear wheels off of the ground put in gear and throttle up to see if the rear wheels will spin without resistance??

So I have jumped in with both feet! I have taken apart and with my untrained eye, I don’t see any thing broken. Pictures attached. All bearings move freely. All springs are good, etc… the only thing that I am not sure off is- when I move the shift lever it does not move the inside shaft that it seems to be connected to. What do y’all see?Thanks

 

[Gotmyrtvmike]

Here are more pictures part 2

 

[Gotmyrtvmike]

So this last picture show where I move the lever but nothing inside moves. Am I missing something? Should it shift when I move the lever?

 

[Gotmyrtvmike]

I have an 1120D and I am taking copious notes!!!! I am actually following most of this. What a great site.

I have learned a lot. I feel like I can try anything with these guys helping me through it!

 

[aurthuritis]

View attachment 14143View attachment 14144View attachment 14145View attachment 14146View attachment 14147View attachment 14148View attachment 14149View attachment 14150View attachment 14151So this last picture show where I move the lever but nothing inside moves. Am I missing something? Should it shift when I move the lever?

that red arrow is pointing to the speed control servo piston. with proper charge pressure and attached to the machine it will tilt the swash plate. when the swash tilts it begins to pump high pressure oil to the valve assy and it will begin to rotate. the valve body assy is basically a rotary piston motor and it turns the input shaft that is attached to the gear train in the high low reverse gears.

 

[Gotmyrtvmike]

that red arrow is pointing to the speed control servo piston. with proper charge pressure and attached to the machine it will tilt the swash plate. when the swash tilts it begins to pump high pressure oil to the valve assy and it will begin to rotate. the valve body assy is basically a rotary piston motor and it turns the input shaft that is attached to the gear train in the high low reverse gears.

Thank you! Learning a lot from you guys

 

[aurthuritis]

from the photos it looks like the thrust bearing is worn out and the charge pump looks bad also. the valve plate needs replaced.

 

[Gotmyrtvmike]

I bought a set of gauges and I am not getting a reading on the high pressure side. I haven’t checked low pressure side. Hard time getting screw loose. Another question for you. When putting the Hst back onto the transmission the gasket was in good shape. I could not tell if their was any gasket sealer. It is leaking when I crank it. Does it need sealer? Also, would this keep it from building pressure or should it show some pressure?

 

[aurthuritis]

getting those plugs out can be a bear. the gasket leaking shouldn't cause your no pressure problem. you can use anaerobic sealer if you want. in order to build high pressure you first need to have proper charge pressure to fill the high side pumps.

 

[Gotmyrtvmike]

If there is other pictures anyone wants to see I can tear down my other transmission to show the inside gears.

 

[Gotmyrtvmike]

getting those plugs out can be a bear. the gasket leaking shouldn't cause your no pressure problem. you can use anaerobic sealer if you want. in order to build high pressure you first need to have proper charge pressure to fill the high side pumps.

Ok I will try and order a new charge pump and come back once I get it. Thanks again

 

[Gotmyrtvmike]

Ok I will try and order a new charge pump and come back once I get it. Thanks again

getting those plugs out can be a bear. the gasket leaking shouldn't cause your no pressure problem. you can use anaerobic sealer if you want. in order to build high pressure you first need to have proper charge pressure to fill the high side pumps.

Any suggestions on breaking loose the low pressure screw? And do you know what size Allen wrench it takes?

 

[aurthuritis]

i have used a punch and a hammer to shock the plug a few times. sorry i don't remember the size? might try an impact wrech?

 

[Gotmyrtvmike]

i have used a punch and a hammer to shock the plug a few times. sorry i don't remember the size? might try an impact wrech?

I will try that. Thanks for the suggestion

 

[Gotmyrtvmike]

I finally got the time to take my old charge pump off and replace with the new one. All back together and I have a low pressure reading of 22psi and 12psi on the high pressure side. Any suggestions @aurthuritis ?

 

[aurthuritis]

did you replace the plates?

 

[aurthuritis]

get the flow schematic out of the wsm and look for the bypass flow valves. take them out and clean and inspect them there is a possibility you can adjust them. it the bypass isn't leaking then there is an internal leak at the plates or in the high pressure valve block assy

 

[Gotmyrtvmike]

get the flow schematic out of the wsm and look for the bypass flow valves. take them out and clean and inspect them there is a possibility you can adjust them. it the bypass isn't leaking then there is an internal leak at the plates or in the high pressure valve block assy

Great I will do that and let you know
As always, Thank you!

 

[Armyaviatr]

Great I will do that and let you know
As always, Thank you!

Mike

I assume you discovered something catastrophic or decided the repair isn't worth the effort. I am basing this assumption on the fact you are parting out an RTV-X1120D.