I have a D8N i have loss steering only going forward and back no turning. pan is not lifting and hydraulic temp high. I

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Customer: I have a D8N i have loss steering only going forward and back no turning. pan is not lifting and hydraulic temp high
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Equipment Mechanic I'm going to connect you with knows all the tricks and shortcuts.
Customer: thank you
JA: Are you fixing this yourself? What have you tried so far?
Customer: I have had someone take a look at it and they are telling me it may be the hydraulic pump not giving enough pressure
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: no
Answered by Daniel Wilson in 1 day 3 years ago
Daniel Wilson
Auto Mechanic

20,006 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

While operating tractor for the past 2 days I notice that the hydraulic temperature gauge was going extremely high and the hydraulic light kept flashing on the dashboard. I shut the machine down for about 1/2 hour to allow it to cool down then return to operating the machine for approximately 1 hour when the temperature begun to get extremely high once again. I cracked open the hydraulic tank and a lot of air came out. I bleed of the air and the temperature returns to normal very quickly.
On start up the pump makes a loud humming noise then quiets down a little.
On day 3 the same happens again the hydraulic temperature goes to high and i shut the tractor down allowing it to cool down. After cool down i restart it but this time it goes forward and backwards but does not turn left nor right, neither does the ripper or the dozer pan goes up.
Can this be a pump failure? If yes. Which pump should i be looking at?Thanking you in advance

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.

What is your serial number?

Year: 1989

The symptoms you are experiencing as expected could very well be a pump failure occurring. To troubleshoot this, first look inside your hydraulic filter and suction screen for any signs of fine metal or debris that will look like glitter in the oil or filter. If found, you most definitely have a pump or component failure in need of replacement after cleaning out the complete system of contamination since you do not want to contaminate any new pumps or components by leaving any of this contamination or metal in your system which will only create further damage. If clean however, you will want to have your pressures tested and confirmed whether or not they are within factory specifications for your service book on your model and serial number. It's a pleasure to help anyway I can.

Ok i will check the valves and fet back to you

You're very welcome and it's a pleasure to help anyway I can.

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Daniel Wilson
20,006 satisfied customers
Auto Mechanic
Daniel Wilson
Auto Mechanic

20,006 satisfied customers



Licensed mechanics

31,131 satisfied customers

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