Our T180 skid loader is signaling low oil pressure then shuts down. It will start back up and act ok for a short while, then repeats. I took it to the dealer and he immediately started in about a new engine and went on and on to the point that I thought i was being pre-greased. Here is my questions. It has 950 hours. I sense no loss of hp or rpms when cranked. there is no engine knocking. there is no engine smoking when running. There is no mixing of any fluids senarios. They said the sensor is good that they did a manual test and it is running 12 psi of oil pressure. any directives out there.
LOW OIL PRESSURE
- Thread starter cajunfuse
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SSdoxie
Elite Member
The first and obvious thing to me would be find out why it has low oil pressure. 12 psi at idle would not trigger a code, but at high RPM it would.
Why? Is oil pump worn? Is there excessive clearance in a bearing somewhere? Is there a suction leak at the oil pickup tube? Dealer is giving you worst case scenario, but it will take some labor time & $ to find out route cause and correct repair.
Why? Is oil pump worn? Is there excessive clearance in a bearing somewhere? Is there a suction leak at the oil pickup tube? Dealer is giving you worst case scenario, but it will take some labor time & $ to find out route cause and correct repair.
PoorPlowboy
Platinum Member
What's the maintenance history of the engine look like? Regular scheduled oil and filter changes done?
See if you can locate a manual oil pressure gauge and a service manual for the engine to show where the correct port to check the pressure. It could either be a faulty sending unit or gauge if maintenance has been done on schedule.
In other words, that's the type of expense that I must see the diagnostics performed with my own eyes and known good set of gauges.
If it truly is showing low oil pressure on the manual gauge, I've extended the usable life of engines by going up a couple levels on oil viscosity to where it would build safe pressure again.
See if you can locate a manual oil pressure gauge and a service manual for the engine to show where the correct port to check the pressure. It could either be a faulty sending unit or gauge if maintenance has been done on schedule.
In other words, that's the type of expense that I must see the diagnostics performed with my own eyes and known good set of gauges.
If it truly is showing low oil pressure on the manual gauge, I've extended the usable life of engines by going up a couple levels on oil viscosity to where it would build safe pressure again.
tmajor
Platinum Member
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After checking gauges, etc., I'd go for the pump. My NAA had low pressure from the day I bought it, used. Finally, the pressure dropped to zero .. the valve in the pump was stuck. A new pump gave me more pressure than it had ever had.
ToadHill
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I'd start with a new sending unit. If that is faulty it could be causing the problem you are having. Next, I'd drop the pan and replace the pump. If both of them do not solve the problem, it's time for new bearings but at 950 hours with regular maintenance I doubt that is the issue.
SSdoxie
Elite Member
The controller monitors engine RPM versus oil pressure so the pressure minimum varies with engine speed. The minimums are: at idle - psi must be more than 8. At full throttle - must more that 25 psi to prevent a low code and 20 pis or less will cause shutdown. To check the pressure with manual guage, remove the pressure switch and screw in a guage. With switch removed and unplugged, engine will stay running but give code that the switch is unplugged.
