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I have a New Holland C232 skid steer. I had a 3/4” hydraulic…

Customer Question
I have a New...

I have a New Holland C232 skid steer. I had a 3/4” hydraulic hose to right side final drive rupture and lost all hydraulic fluid. I replaced the hose and fluid, now the park brake light won’t go out until half throttle and when I throttle down it comes back on. I also get fault code 4431 solenoid is working. Could the valve be sticking or clogged ?

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Some other hydraulic issues have arisen also the bucket doesn’t operate properly and the right track isn’t working.

Submitted: 3 years ago.Category: Construction and Road Equipment
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Customer reply replied 3 years ago
My wait time was said to be 8 minutes. That was 2 hours and 22 minutes ago!
Answered in 3 hours by:
8/12/2019
Mechanic: Dan, Technician replied 3 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,646
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
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Hi, My name is***** will be glad to help. We can follow up as needed on here, Give me some time to review your information and follow up with my responses. Professionals are not employees of the site but users of the site and help on here as time allows in between jobs, family, etc. Response time can vary depending on my work load each day but I will always respond back on my next available login. Feel free to respond back at anytime if for any reason we seem to get separated, for status, etc.

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Customer reply replied 3 years ago
NFM 410338
Mechanic: Dan, Technician replied 3 years ago

4431 ALL Park Brake Pressure Switch (Plausibility Check With Solenoid Valve)

Thoroughly inspect the wiring and connector pins going to your part brake pressure switch and solenoid. Look for any corrosion or damage as well as any open circuits. It is possible that you have a faulty pressure switch as well. Check for any signs of metal or debris that would also indicate that you have a hydraulic pump or component mechanical failure occurring just to be on the safe side. It's a pleasure to help anyway I can.

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Customer reply replied 3 years ago
I am getting the park brake light to go out at half throttle. When the light goes out the boom works up and down properly and the left final drive also. Why won’t the bucket and the right final drive work ?
Mechanic: Dan, Technician replied 3 years ago
That would take some further troubleshooting to determine.I would check for any signs of metal in your hydraulic filter that would indicate a potential component or pump failure starting or occurring. I would also have your pressures tested to see if you have the proper pressure and flows per spec in the service manual for your machine.
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Customer reply replied 3 years ago
No metal anywhere in hydraulics. Some controls work great and some not at all. I’ve checked, wiring, plugs,fuses, solenoids/valves and fluid at cylinders, all are good. I will try to have pressure checked also. Perplexed!
Mechanic: Dan, Technician replied 3 years ago
If it is isolated to certain functions then you will want to look in your main control valve and the fools for those functions as well as the relief valve cartridges for those functions.
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Customer reply replied 3 years ago
I’m not sure what you meant by fools or where to find the relief valve cartridges.
Mechanic: Dan, Technician replied 3 years ago

That was supposed to be spools. The spools within the valves. Check them for any damage or scoring.

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