HOW TO FIX SHAFT AT SITE?

Repair steps for stem strain

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Use a file to remove the burr at the strain of the valve stem; For the strained parts, use a flat shovel to process to a depth of about 1mm, and then use an abrasive cloth or angle grinder to polish and roughen, at which point a new metal surface will appear.

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Clean the surface with TL-700 metal cleaning agent to make the repaired surface free of oil, dust and dirt.

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Apply wear-resistant repair agent.

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Detail trimming.

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Preparation and application process of wear-resistant repair agent

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Formulation of repair agent at a volume ratio of 3.8:1;

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Apply the adhesive to the strained surface for the first time should be as little as possible, from top to bottom, no bubbles are allowed.

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After the first application of glue for 1 hour (i.e., after the initial curing of the adhesive), remix the repair agent as needed and apply it for the second time, which is 1~2mm higher than the original size.

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After natural curing for 1 hour, heat with an 80~100°C iodine-tungsten lamp for 3 hours.

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Detail trimming process requirements

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Use a file, scraper, and abrasive cloth to remove excess adhesive above the original size, measure it during operation without reducing the adhesive layer below the original size, and leave 0.5mm as the finishing allowance.

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When the size reaches the finishing amount, trim it with a pre-processed grinding fixture (80 mesh abrasive cloth on the pad).

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When the size is 0.2mm higher than the original size, replace the emery and grind to the actual dimensional accuracy.

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Precautions

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Due to the use of on-site repair, in order to ensure the quality of repair, the dust and oil around the repair (especially the upper part) must be cleaned; If there are defects (such as small pores, etc.) after repair, the glue should be repaired, and the operation process is the same as above.