Manuale Officina LGW 523-627 - lombardini service

Disassembly / Reassembly4Piston coolant nozzlesCaution – WarningThe piston has a recess so that during up-down movementsand vice versa it cannot come into contact with the nozzle.When remounting the nozzle be careful that it is placed so thatwhen the piston goes past it is in the centre of the recess.They are in the supercharged LDW 1204/T engine and are housednear the main bearings.Components:131 1321 Washer2 Nozzle3 Washer4 Joint (tighten to 12Nm)5 Valve (opening pressure = 1÷1.2 bar)6 SpringCharacteristics (mm):A B C Dα0,80÷0,8534150165°Shoulder half ringsSo as to keep them in their seats during assembly, put a bit ofgrease.The half-rings must be assembled with the slots A as in the figure.Thickness of half-rings is equal to 2.31÷2.36 mm.They are supplied as spare parts as increased thickness 0.1 and 0.2mm, see below.133Crankshaft axial clearanceAfter tightening the main bearings measure the axial clearance Abetween the crankshaft flywheel side shoulder and the main bearinghalf rings.Ref.ClearanceLimit valueA mm0,130÷0,3130, 5B mm23,05÷23,1023,50If the clearance is not within the given value check value B.If need be, fit oversized half rings, see below.134 135FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06- 61 -