If your chain has a master link, use your hands to slide the pin out of the slot in which it’s seated. When the chain disengages, pull it free. Without a master link, you’ll need to jump a link off one of the gear spikes. After the first link, the rest should come off easily, then pull the chain out of the drivetrain.  Removing the chain is especially important for chains with heavy surface rust and grime. Chains with light rust and dirtiness can often be cleaned with the chain attached. Chains without a master link are reinserted into the drivetrain in the same fashion they are removed, only in reverse. Dampen a clean rag with degreaser. Pull the chain through the rag to remove buildup and grease. Stubborn buildup might need a vigorous scrubbing or buffing with the rag before it comes free. For severe buildup, you may need to soak your chain in degreaser. Fill a bottle with degreaser, allow the chain to soak in it for 20 minutes, then rinse the chain in a second bottle filled with hot water. Most degreasers can be quite harsh on the skin. Wear latex gloves when using a degreaser unless otherwise indicated on its label This de-rusting technique can be rough on the hands, so slip on some latex gloves before you try it. Next, wet a piece of steel wool thoroughly with lime juice. Scrub rusted areas with the steel wool to remove rust, then wipe the surface clean with paper towel.  Rust that is neutralized and scrubbed free may gunk up your steel wool. If this happens, rinse it in hot water, reapply the lime juice, and continue scrubbing. When breaking up large amounts of rust, you may need to wipe the surface periodically so you can see how much rust is left on the surface. Lime juice contains a good amount of sugar. You won’t want this drying on your chain and gumming up the works, so make sure to rinse the chain in warm or hot water mixed with a little dish soap. Spray WD-40 directly onto the clean, rusted surfaces of your chain in sections. Allow this to sit for a moment so the solution can soak in. After that, take a wire brush and briskly scrub away the rust.  Wipe off the chain with a clean rag as necessary to remove rust residue. When the rust is gone, you’re ready to reattach and/or lubricate the chain. WD-40 should never be used to lubricate the chain of your bike. You should only use a specially formulated bike lubricant for this purpose.
فُك السلسلة من مكانها في حالة الصدأ السطحي الشديد. امسح السلسلة بقطعة قماش مبللة بمزيل الشحم. انقع السلاسل المتضررة بشدة من الشحم والأوساخ في مزيل الشحم لمدة ٢٠ دقيقة. أزِل الصدأ السطحي بدعك السلسلة بالصوف الفولاذي المُبلل بعصير الليمون. اشطف السلسلة من عصير الليمون بالماء والصابون عقب إزالة الصدأ. نظّف الصدأ شديد المقاومة باستخدام فُرشاة تنظيف سلكية ومزيل الصدأ الكيميائي دبليو دي (WD-40).