Gordon, should I check the fluid level then?
If its a hydraulic system then it will have reservior (have seen shared reserviors but haven't a clue about Focus, strongly doubt it), lift the bonnet and have poke nose, you should note the level when you lift the bonnet and cast your eyes about every time you check the oil level just as you would glance at the brake fluid level, reservoir should be transluscent and if you take the cap off the colour and consistency of the fluid might well give you a clue as to its condition.
Even if the level is kept high these systems can feel spongy after a long time and replacing the fluid is always worth doing periodically just as with brakes.
If you bleed the system through, exactly the same method as two man brake bleeding, and then top up again, that should have eliminated the hydraulics and for the sake of 5 minutes would be the first thing i would do.
Personally i wear a latex or marigold glove (ooer missus) and after loosening the slave cylinder bleed nipple hold my finger lightly over the end using it as a valve whilst an assistant pumps the clutch pedal steadily half a dozen times, chances are you'll hear any air present squirting out, retighten on a final down stroke, job done, chuck a bucket of hot water over the slave and anywhere that brake fluid might have spilt, its an effective paint stripper...if you can get a dish under to catch spillage and use a thin hose connected to bleed nipple then all the better, in practice always found slaves to be in dashed awkward spots so let it splash and wash off after.
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