Man D2862 LE221 - Page 326

CRANKMECHANISM
Connectingrodradialplay.............................................................................................0.060–0.128mm
Connectingrodaxialplay..............................................................................................0.240–0.438mm
Expansion....................................................................................................................................2.0mm
Pistondiameter
D1measured13mmabovepistonbottomedge......................................................127.898–127.902mm
Pistonring(keystonering)
Pistonring(keystonering).....................................................................................3.5mm(nominalvalue)
Pistonringwidth...............................................................................................................4.50–4.90mm
Ringgap..........................................................................................................................0.45–0.55mm
Pistonring(taper-facering)
Pistonringheight..............................................................................................................2.47–2.49mm
Pistonringwidth...............................................................................................................4.90–5.30mm
Axialplay.........................................................................................................................0.09–0.18mm
Ringgap..........................................................................................................................0.45–0.55mm
Pistonring(double-bevelledring)
Pistonringheight............................................................................................................3.475–3.49mm
Pistonringwidth...............................................................................................................3.70–3.90mm
Axialplay.....................................................................................................................0.040–0.085mm
Ringgap..........................................................................................................................0.30–0.50mm
Pistonheight
Overallheight................................................................................................................115.4–115.6mm
Pistonheightfrommiddleofpistonpintopistoncrown/PHlevel0.................................78.95–79.05mm
Pistonpin/pistonpinbore
Pistonpindiameter....................................................................................................54.994–55.000mm
Pistonpinbore..........................................................................................................55.063–55.093mm
Pistons
Pistonstandoutmeasuredfromcrankcasetopiston...................................................-0.361to+0.080mm
Importantinformation
WARNING
Componentdamageduetoincorrectlytightenedscrew/boltconnections
•Ifimpactwrenchesareused,thesemayonlybeusedforpretighteningtomax.50%ofthe
speciedtighteningtorque
•Finaltighteningmustalwaysbeperformedmanuallyusingatorquewrench
WARNING
Cracksurfacesaresensitive.Theprincipleinvolvedcancausechipping
•Exchangetheconnectingrodifthecracksurfacesaredamaged
•Protectcracksurfacesagainstdamagecausedbyhardandsharpobjects
•Tocleanthecracksurfacesontheconnectingrods,alwaysrinsethemincleancleaningagent
•Aftercleaning,usecompressedairtoblow-drythecracksurfaces
•Makesurewashed-outparticlesdonotgetintotheengine
Note
Thepistondiameterisalwaysmeasuredperpendiculartothepistonpinbore.
324AE63stedition