Leonardl , thank you for the comments as well as the tip about the brass plug ! point well taken and it will be fix asap, very good point I did not think of those obstacles than could damaged the plug .
here are some more pics of the work I did last evening .
cleaned the alternator.
fix the lower radiator holder.
finished the cleaning of the front and right side of the motor
check of the temp. sensor .
fixed of the radiator top side holder from rivets to bolt
I undid the hydraulic oil pump as well .
cleaning of the alternator
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00071.jpg)
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00085.jpg)
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00048.jpg)
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00105.jpg)
fixed of the radiator top side holder from rivet to bolt
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00088.jpg)
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00089.jpg)
fix the lower radiator holder
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00091.jpg)
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00093.jpg)
check of the temp sensor conductivity
meter in DIODE test mode to hear the BEEEP of continuity
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00098.jpg)
check of the temp. sensor at room temp
meter on OHM mode
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00099.jpg)
check of the temp. sensor at slightly heated temp
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00102.jpg)
the famous gauge which I think it is not accurate at all but need to verify
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00103.jpg)
undoing the hydraulic pump
![Image](http://i15.photobucket.com/albums/a351/towoc999/dozer/DSC00036.jpg)