Hi Gang,
our Kubota tractor usually has very good oil pressure 60+psi cold and runs at 45+psi.
It has been cold here in western Canada but the diesel motor starts and runs perfect.
This time of year we use it for pushing the snow.
Started the motor as normal and was watching the mechanical oil pressure gauge (we installed) while it was warming up.
The gauge started moving as I was cranking and when the motor started the pressure was at 60+psi and then went to zero . I shut it down and removed the oil pressure relief valves near the pump hoping that they might be stuck open, they looked closed.
The motor is a two cylinder 18hp. diesel- I have the workshop manual but it doesn't show any where that I can see that there would be anything to break in the oil syslem.
anybody happen to have any insight on the lube system on these Kubota.
Is there any chance we sheared off a drive somewhere?
thanks in advance
Tow'd

TOW'D, December 2007

Hi. well done for shutting it off straight away. a quick check before you get too involved, remove the sensor for the oil gauge from the engine block and turn the motor over. if it squirts oil then the gauge is the problem.

this may not be the problem but There are sometimes just interference fit drives on oil and water pumps in diesel engines(means they are just pushed together) its not a great system and is prone to fail. you can fix them by centre punching some dents in the shaft and hamering it back together. carefuly

bush mechanic, December 2007