Manuale Officina LGW 523-627 - lombardini service

4Disassembly / ReassemblyCYLINDER HEAD, removalImportantDo not remove the cylinder head when hot to avoiddeformation.lf cylinder head is deformed by more than 0.10 mm, level it off byremoving a maximum of 0.20 mm. For the cylinder head tightening procedure see page 57.78ValvesTo remove the valves it is necessary to remove the collets; place aspacer under the valve head, press strongly on the spring cap asshown in the picture.Components:1 Valve stem2 Valve stem seal ring3 Spring seat4 Spring5 Spring cap6 Collets7980Valve stem sealing rings - ReassemblyTo prevent deformation of the sealing ring 1 as it is inserted onto thevalve guide, insert it onto tool "7107-1460-047" 2 (after lubricatingthe sealing ring) and proceed as shown int the picture ensuring thatgasket 1 is completely fitted.8182Valve springsMeasure free height with a gauge.Free height A = 46 mm.Note: If the free height A is less than 43,5 mm replace the spring.83- 48 - FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06