cat 416c front bucket tilt

Another problem has appeared. After machine warms up, the front bucket won't hardly tilt/curl up empty or loaded. Sometimes it will, but real slow, other times I have to drop bucket down and back up to get it started and then it may or may not curl up. Working other hyd at same time has no effect. I have been told to check the resolvers. Can someone post a pic and point me in right direction? ser# 4zn02115

cat 416c front bucket tilt