Engine body - Service procedures
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Turn the milling tool clockwise and with a uniform movement. The cutting feed takes place automatically in that the nut follows the movement and presses the spring together.
The cutter holders are marked with the letter A, B, C or D and the corresponding letter is stamped in the cutting head where the cutter holder shall be placed. NOTE! The two socket head screws in the cutter holder shall not be touched.
6 Turn the tool until the steel ceases to cut, and then remove the nut and lift up the milling head. 7 Clean the cylinder head carefully. Check the depth of the grooves by replacing the milling head without spring and nut, and by turning it round a few turns with
3 Put the cutter holders in the milling head as per the letter markings and with the groove turned to the lock screws. Adjust the cutter height as per previous instructions.
hand pressure. If the tool does not cut, the grooves have the correct depth. This check shall always be made because shavings can come in under the shoulder of the milling head. The burrs which arise on the edges of the grooves shall be left, since removing these may imply damage to the edges and inferior sealing.
Valve guides, inspection Special tools: 9989876, 9696
Replacement of cutter sets 1 Unscrew the lock screw a few turns and screw the adjusting screw upwards so that the cutter holder can be removed from the cutting head.
To determine the wear on the valve guides a new valve is put in the guide, after which the clearance is measured with a dial test indicator. 1 Remove the screw pin for the injector yoke and place the cylinder head on a flat surface so that it rests on the valve guides. Block up the one edge of the cylinder head so that it rests secure on the underlying surface.
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