A loaded winch
Anchor winch on deck
For disassembling a winch...
...you need proper tools...
...and suitable grease.
Regularly check the anchor winch,...
...especially if mounted in the bow locker.
Also carefully check all splints.
And your guardrail...
...is well worth a thorough examination.
Are all blocks running freely?
Are any pulleys worn off?
Are the halyard clamps in good working order?