If valveclearance needs to be adjusted, loosen the locknut on rocker arm adjustingscrew. Turn adjusting screw until feeler gauge slips with a slight drag.
如果气门间隙需要调节，松开摇臂调节螺丝上的防松螺母，转动调节螺丝直到测隙规滑动时稍带阻力为止。
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The squeezing stress between the valve end the screw for adjustingvalveclearance must be taken into account in designing high speed valve train.