You have to pull some of the levers. There are seven levers, only a certain combination of lever positions will open the critical door. Go to an online guide, for example runescape.wikia.com, and search for the quest you are doing, for more details.
Go to youtube and search runescape ernest the chicken oil can.
Have you tried oiling the hinges? 3-1 oil works
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You need to get Swamp Tar and take it to the chemist in Rimmington where he can turn it into oil.
Oil it
The oil can is in the sort-of-hidden basement of Draynor Manor. You can go to the Quest Help under Game Guide in the Runescape website if you're having trouble getting through the maze.
Firstly, make sure the hinges are correctly aligned and that the gate hasn't dropped on them. Then lubricate the hinges thoroughly.
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Floc in refrigeration oil is wax that has separated out from oil containing parathene.
You don't but in order to get a lit oil lantern you should check out the crafting guide for more answers.
You don't make it you just go to the chemist's near Rimmington.
In oil lines, commonly used valves include gate valves, ball valves, and check valves. Gate valves are often employed for on/off control, allowing for minimal pressure drop when fully open. Ball valves provide quick shut-off capabilities and are ideal for high-pressure applications. Check valves prevent backflow, ensuring the oil flows in one direction, which is crucial for maintaining system integrity.