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FJR Motorcycle Forums
Technical & Mechanical Problems
broken brake caliper bolt
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<blockquote data-quote="Twigg" data-source="post: 1161075" data-attributes="member: 27619"><p>It's a developed skill, knowing where you can play "fast and loose" with recommended torque settings, and what they mean in the first place.</p><p></p><p>Caliper bolts, while they are a safety critical item, actually do not usually need to be very tight. A bit of Locktite Blue is better than a "too tight" bolt. All they have to do is hold the caliper in place along the length of the bolt, and not fall out. They don't hold anything down with a clamping force in the way, say, cylinder head bolts do. So snug them up nice and tight with a standard 3/8th ratchet handle, and lock the threads. If you are paranoid, drill a small hole through the heads and wire them in place.</p><p></p><p>Develop a "feel" for what you are doing. The Service manual will give you the spec, but work out what it is the bolt is doing too, that gives you an idea of what is required and why. Use a calibrated torque wrench to develop an idea of what various torques feel like, and remember that your ratchet handle is shorter, so the tightening force needs to feel greater than you feel with a TW.</p><p></p><p>ps ... Never, ever, ever use Locktite Red unless you don't intend removing the bolt later. It requires high heat to break the bond, and smaller bolts will shear before they come loose. Only use if if specified.</p></blockquote><p></p>
[QUOTE="Twigg, post: 1161075, member: 27619"] It's a developed skill, knowing where you can play "fast and loose" with recommended torque settings, and what they mean in the first place. Caliper bolts, while they are a safety critical item, actually do not usually need to be very tight. A bit of Locktite Blue is better than a "too tight" bolt. All they have to do is hold the caliper in place along the length of the bolt, and not fall out. They don't hold anything down with a clamping force in the way, say, cylinder head bolts do. So snug them up nice and tight with a standard 3/8th ratchet handle, and lock the threads. If you are paranoid, drill a small hole through the heads and wire them in place. Develop a "feel" for what you are doing. The Service manual will give you the spec, but work out what it is the bolt is doing too, that gives you an idea of what is required and why. Use a calibrated torque wrench to develop an idea of what various torques feel like, and remember that your ratchet handle is shorter, so the tightening force needs to feel greater than you feel with a TW. ps ... Never, ever, ever use Locktite Red unless you don't intend removing the bolt later. It requires high heat to break the bond, and smaller bolts will shear before they come loose. Only use if if specified. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
broken brake caliper bolt
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