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| Nuts and bolts for securing covers and housings must be slackened and tightened in diagonal sequence. |
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| Loosen and tighten particularly sensitive parts in diagonal sequence and in stages, taking care to keep them straight. |
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| The tightening torques stated apply to non-oiled nuts and bolts. |
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| Always renew self-locking bolts and nuts. |
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| For all threaded connections, ensure that (where applicable) the contact surfaces and the nuts and bolts are not coated with wax until after assembly is completed. |
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