JD 830 3Cyl. Power Steering Quits when u clutch the PTO Supply Bypass Valve?????????

[RottenGround]

JD 830 3Cyl. Power Steering Quits when u clutch the PTO Supply Bypass Valve?????????

 

[Zebrafive]

Do you have the Independent PTO? PTO engage lever between the shift levers?
If so, you are saying you lose Power Steering when you disenage the PTO? Sounds like you have a broken internal line to the PTO brake that is takeing all your hydraulic flow. Leaking internally. Requires splitting tractor to repair.

My JD 2030 broke the PTO engage line to the PTO clutch pack. I lost all hydraulics with PTO engaged, normal when disengaged.

 

[RottenGround]

there is a tranny oil pump that supplies oil to front mounted ps/hyd pump that pump runs off of the pto shaft so there for when clutch the independent pto it stops pumping and they say the main pump pulls oil from sump due to supply bypass valve but im not sure

 

[Zebrafive]

I think there is a reservoir above the front pump that supplies oil when the trans pump stops for a very short period of time. I don't think the main pump can draw from the sump.

 

[RottenGround]

im not sure but the lines come straight from the ps sector to pump and the hydraulic lines go from the pump to the sump

 

[RottenGround]

I think the supply bypass valve is located inline right after the outlet side of the the tranny oil pump in the sump

 

[Zebrafive]

im not sure but the lines come straight from the ps sector to pump and the hydraulic lines go from the pump to the sump

Main pump feeds PS first.
The line you see going from the main pump to the sump actually connects to the output line internally from the trans pump.

 

[Zebrafive]

I think the supply bypass valve is located inline right after the outlet side of the the tranny oil pump in the sump

You may be refering to the Pressure Control Valve. It is mounted on the pressure line from the main pump after the PS is fed. It reduces downstream pressure to rockshaft (3pt hitch arms) and SCVs if the demand for pressure is greater than the main pump can provide so the PS has priority.

 

[RottenGround]

yes i think it is called supply bypass valve opens due to negative pressure i think it is actually the outlet line off of the tranny pump

 

[Zebrafive]

The Pressure Control Valve is off the Main Pump. You might be thinking of the Surge Relief Valve, it's off the trans pump.

 

[Zebrafive]

yes i think it is called supply bypass valve opens due to negative pressure i think it is actually the outlet line off of the tranny pump

There is also a inlet check valve just off the trans pump to the main pump. The trans filter has bypass valve, it's called a Fiter Relief valve.

 

[RottenGround]

thanks for the info is it located inside the tractor or is it external? Thanks for the info on the load control too.

 

[RottenGround]

http://jdpc.deere.com/pimages/RWP2/RWP2330________UN01JAN94.gif

I think number 10 is the line and the kicker off of the side is the supply bypass valve What do u think??

 

[Zebrafive]

Key 10 is the output line from the tranmission pump. The branch by Key 11 is going to the trans filter. Not sure if "kicker" goes to surge relief, but it might.

In attached picture Keys 22-27 are the filter relief/bypass valve.
I think keys 14-17 are the surge relief valve.
Both can be accessed from out side the tractor, no splitting required.

 

[RottenGround]

i tore mine apart over the weekend number 10 like u said is the output from the tranny pump the kicker just hangs there right above the bottom of the sump it just pulls from right there and it has a ball valve that opens during suction from the front mounted pump mine was stuck shut