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| Loosen lock nuts of adjustment screws -1- and remove adjustment screws. |
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| Remove rocker arm securing bolts -2- (from outwards to inwards) with socket XZN 10 -3410- and remove rocker arm shaft. |
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| Remove tensioning block securing bolt -3- with special wrench, long reach -T10054- and remove the block. |
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| Lever connector off unit injector using a screwdriver. Support opposite side of connector with light finger pressure to prevent canting. |
Observe unit injector cylinder allocation. |
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