Thanks!
Should be this: flip toggle switch, curl back bucket and hold joystick to keep pressure on the curl back for a few seconds, pins “should” retract, set bucket down and roll the bucket forward like you’re dumping it. Now, IF the pins don’t move they probably just need to be sprayed with some penetrating oil because they haven’t been retracted in a while.
How should you lube the pins?
Should be a grease fitting on the boss that the pin rides in.
Keep in mind that the QC pins are down there where rock dust etc mixes with whatever lube and gums things up. Just like the lower bucket pins they need extra care and lubing. @Tags laid it out nice above. If you can enlist a helper, often you can see those QC hoses dance a bit when they get pressure on them. That would give you a clue on functioning vs not vs just gummed up. Sometimes you put pressure on them and give the bucket a quick rattle in curl to get things moving.