Contact a lubricant manufacturer's representative and ask the same question. They would be best suited to provide you with a product that would be compatible with the environment you have described.
Ron
Is it useful or worthwhile to lubricate (using grease or oil ) wire rope of a crane used in making a 50 meter deep trench when this wire rope is immersed in water and mud during loading.
Contact a lubricant manufacturer's representative and ask the same question. They would be best suited to provide you with a product that would be compatible with the environment you have described.
Ron
It really depends what you're trying to achieve. Is the crane malfunctioning, not working smoothly? Will the rope be immersed in water and mud at time or always?