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hello from a state of disassembly.
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<blockquote data-quote="donrapide" data-source="post: 7507" data-attributes="member: 120"><p>If you do go ahead with the H.T. bolt replacement, as I did, the English/Imperial H.T. bolts are grade "R" which is the best compromise of shear strength and tensile strength.</p><p> </p><p>UNF/UNC are stronger in tensile but not as good in shear. Allen cap headed bolts are not reccomended for this application.</p><p> </p><p>You can have complete confidence in these Grade 'R' bolts particulary if you carefully turn the chamfer taking care not to 'nick' the bolt shank. And fit chamfered high tensile nuts, not B&Q quality!</p><p> </p><p>Do take into account the small amount of clearance between the oil tank nuts and bolt heads. You need this clearance to allow for movement and all the cables, control and electrical. So any alternative fixing must be as slim as the original.</p><p> </p><p>It would seem that your bolts are already out but if anyone reading this thinks to remove the original bolts, just to see or replace them be very careful. The bolts have been there for some 50 years and could/would be the very devil to remove. If no signs of red dust under the nuts, fretting corosion, leave well alone.</p></blockquote><p></p>
[QUOTE="donrapide, post: 7507, member: 120"] If you do go ahead with the H.T. bolt replacement, as I did, the English/Imperial H.T. bolts are grade "R" which is the best compromise of shear strength and tensile strength. UNF/UNC are stronger in tensile but not as good in shear. Allen cap headed bolts are not reccomended for this application. You can have complete confidence in these Grade 'R' bolts particulary if you carefully turn the chamfer taking care not to 'nick' the bolt shank. And fit chamfered high tensile nuts, not B&Q quality! Do take into account the small amount of clearance between the oil tank nuts and bolt heads. You need this clearance to allow for movement and all the cables, control and electrical. So any alternative fixing must be as slim as the original. It would seem that your bolts are already out but if anyone reading this thinks to remove the original bolts, just to see or replace them be very careful. The bolts have been there for some 50 years and could/would be the very devil to remove. If no signs of red dust under the nuts, fretting corosion, leave well alone. [/QUOTE]
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hello from a state of disassembly.
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