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| Screw snap-in device -VAS 5161/6- with interlocking fork -VAS 5161/4- onto stud on cylinder head. |
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| Push guide bush -VAS 5161/13- as far as it will go into bucket tappet guide for valve to be removed. |
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| Installation position: knurled surfaces face perpendicular to direction of travel. |
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| Slide knurled spacer ring -VAS 5161/17- onto assembly cartridge -VAS 5161/8-. |
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| Insert assembly cartridge into guide bush. |
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| Attach pressure fork -VAS 5161/2- to snap-in device -VAS 5161/6- and push assembly cartridge down. |
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| At the same time, turn knurled screw of assembly cartridge clockwise until tips engage in valve cotters. |
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| Move knurled screw back and forth slightly; the valve cotters are thus forced apart and taken up by the cartridge. |
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| Release the pressure fork. |
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| Take out assembly cartridge with spacer ring, guide bush, valve spring plate and valve spring. |
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