Just bought a new root grapple for my machine. It is the first attachment I have had that uses the aux hydraulics. Hooked everything up and I am locked out electrically from the aux hyd valve. Checked the cable just to make sure and when I take it loose the control handle moves freely. The machine had a similar problem with foot controls and local JDservice worked on it and got me going. I am seeing some splicing of wires related to the bundle that goes to the interlock solenoids for bucket, boom and aux. i can't afford to have them work on it again. They wanted to put a complete wiring harness in it for $1300!!! If need be how do I jumper the solenoid to allow it to work? Red and purple wire going to the interlock solenoid.
CT322 Aux. Hydraulics
- Thread starter Longshot1
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Found out what I thought was a solenoid that locked out the spool on the aux hyd. was actually a switch that indicated if it was in neutral or centered position. The problem is actually that the spool is stuck in the valve body. Help!!!!!
Dave M7040
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How about a picture to help us understand the parts you are talking about.
Is the spool physically stuck due to rust or dirt or is there hydraulic pressure holding it.
Dave M7040
Is the spool physically stuck due to rust or dirt or is there hydraulic pressure holding it.
Dave M7040
M7040 This is the main valve body at the pedals that controls boom, mast, aux hyd and parking brake. The spool for the aux hyd is stuck in the bore of the valve body. I have the position indicator switch out and can look at the end of the spool toward the end cap, or away from the clevis/linkage end. The aux hyd have not been used in the 5 years I have owned the machine. It came from a dairy farm and the cavity where the pump and control valve sits was full of water, mud, muck when I got it. No hydraulic pressure present on that side of the valve.
Got the spool freed up. Made an attachment for my slide hammer out of a clevis and bolted it up where the control cable attached to the linkage. Put penetrating oil in the port where the proximity switch went. Kept pecking it back and forth until it traveled the full travel. Now it centers itself and acts fine. Problem is now I can't get the pressure off the flat face connectors where the hoses connect for the grapple. Had them on the other day but can't get them to go on now. It is like there is pressure at the coupling. I have boom and bucket lowered and have cycled all the controls with motor off to relieve pressure.
J_J
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The pressure has to be off any hyd lines.
The attachment will build up pressure by sitting around on a warm day.
You can either remove the QD or loosen the QD, or wait for things to cool like early morning.
Whatever you can do to relieve the built up pressure.
The attachment will build up pressure by sitting around on a warm day.
You can either remove the QD or loosen the QD, or wait for things to cool like early morning.
Whatever you can do to relieve the built up pressure.
You are spot on JJ. I hooked the two hoses on the attachment together, disconnected them, then hooked them to the machine. Bingo!! The attachment had been sitting in the direct sun all day. Hopefully after a week of working on the machine and not being able to use the attachment I will get to move some logs and brush.
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