There are two sencors for your hydraulic system. one for pressure and one for temperature. They cant be calabrated.The one for temperature is on the side of the hyd. tank. the one for pressure us on the end of a short Hyd.line with two wires conected to it. You may need to get a kit to rebuild your control block to stop your drifting bucket. I will get in my book and try to get you an explanation of lights.Mike
mike i just found that the leak , The presure sender has a small ruber diaphrame that leaks , when the machine is running but only when the hydraulics are in gaged , boom, ect.
the alarm sounded and 30 seconds later the engine shut down , so i tryed an experiment ,
this is the one with the 2 blacks and 1 white wire attached to it , i unscrewed the 2 black wires , and low and behold the alam STOPED . the machine had way more power , too.
yes it still leaked but the engine still runs , july 12/08 , now .
but i wanted you to know you were right .
i did get the inside cleaned out of muck . and found some small oil leaks , even change the temp sensor @ the hydraulic resivoir tank ,were it was burried in muck about 4 inchs deep .
i thought the moisture from the muck mite be shorting , or grounding something . but it did not appear to be now , that its clean .
that presure switch is it a vavle , or silenode ,or just reads resistance , it the hydraulic presure
is blowing past before it reaches the filter but after the cheak valve would that indicate a plug filter or restriction at on time , i think that the fluid presure thier is 100psi .
to at the same time we took a reading of temperature witha lazer pointer temp reader . each of the motors the drive the axels were 110 degrees,
the forward pump 101 degress the rear pump 134 dregrees , the gear pump for aux was 100 degrees . and i found a little leaks at both top sides of the piston pump comming from under the metal plate that suround the controle leaver shafts for stearing . i ordered new seals .
i also replaced the controle lever bearings as they put the pumps into a hum when they were let go buy thier own weight from side lash , that made them more solid feeling . and quited down the piston pumps . of course i did not notice the noise before or untill i replaced the exhaust manifold gaskets .
i have sent for the 4 hydraulic cylinders packing , as i believe that is the source of most of the heat in the system . because the bucket cylinders wont lock,hold them selves in place , even when not under load , and if left in the sun with the engine off they will exstend them selves .
i only noticed this while i was fixing a broke out pin on the boom arm where it conects to the quick attach .
i'll let you know what happen next. lol.