Man D2862 LE221 - Cylinder Head and Valve System Procedures

CYLINDERHEAD
Dismantlingtherockerarmmechanism
Dismantlingtherockerarmmechanism
•Detachthecirclip(1)
•Removethewasher(2)
•Marktheinstallationpositionoftherockerarm(3)
•Pulltherockerarm(3)offtherockerarmshaft(4)
•Repeattheprocedurefortheotherrockerarms
Measuringtherockerarmbearinginside
diameter
•Cleantherockerarm(3)withbearing
•UsetheDialgauge[67](1)andinternalcalliper(2)
tochecktherockerarmbearinginsidediameter
•Repeattheprocedurefortheremainingrocker
arms
Thepermissiblerockerarmbearinginsidediameter
isØ34.005–34.025mm.
Iftheinsidediameterisoutoftolerance,tanew
rockerarm(3).
Measuringtherockerarmshaftoutsidediameter
•Cleantherockerarmshaft(2)
•Checktheoutsidediameteroftherockerarmshaft
(2)usingamicrometer(1)
•Repeattheprocedurefortheremainingrockerarm
shafts(2)
Thepermittedoutsidediameteroftherockerarm
shaft(2)isØ33.959–33.975mm.
Iftheoutsidediameterisoutoftolerance,tanew
rockerarmbracket.
Unscrewingtheadjustingscrew
•Unscrewthelocknut(1)
•Unscrewtheadjustingscrew(3)fromtherocker
arm(2)
AE63stedition221