300.9D mini excavator creeps when being operated. The left track control valve has a weak, deformed spring - (for no apparent reason that I can see). There is no parts breakdown for the control valve (373-9745, $979.96), not even a part number for the orings. I called tech service for Milton CAT and he said he "can't believe" there was no parts breakdown for the valve. He suggested we could buy the whole control valve for $979. His only other suggestion was to for us to ask our sales representative to put in a "Technical Communication" to Caterpillar.
Does anyone have any suggestions on how to obtain a valve spring? Is the maker of the valve body known?