headlamp PORSCHE 911 CARRERA 2003 4.G Owners Manual
Page 236 of 263
AdjustingHeadlights
Seecautionon"ReplacingBulbs..
Adjustment
Theadjustmentismadewiththevehicleready
todriveandthefueltankcompletelyfilled.
Thedriver'sseatmustbeloadedbyapersonor
a165Ibs.(75kg)weightandthetirepressures
mustmeettheprescribedvalues.
Afterbeingloaded,thecarmustberolledafew
meterssothatthesuspensioncansettle.
236PracticalTips,EmergencyService
Forcheckingtheheadlightadjustment,theverti-
calpositionofthecutoffofthelowbeam(see
fig.)hastobeprojectedonaverticalscreen
(wall)indistanceof7.5mfromthefrontlensof
theheadlamp.
Thecorrectpositionofthecutoffis5cmat
7.5m(0.4°)belowahorizontalline,xcmfrom
groundtothecenteroftheheadlamplens.
Lateraladjustmentoftheheadlightsshouldbe
carriedoutataspecialistworkshopwithanopti-
caladjustmentunit.
Distance
Visualaimshallbeperformedatnotlessthan
7.5m(thisvalueisaroundeddownconversion
fromthe25-footdistancetypicaloffieldaim
usingascreen).The7.5mdistanceis
measuredfromtheheadlamplenstotheviewing
screen.
Page 237 of 263
Floor
Thesurfaceuponwhichthevehiclerestsisflat
andapproximatelylevel.
Screen
Thescreenuponwhichheadlampbeamsare
projectedisperpendiculartothefloorandthe
vehicle'slongitudinalaxis,flat,uniformlylightin
color,unobstructed,andwideandhighenough
toaccommodatethevehiclebeampatternsto
beaimed.
Thescreenshouldbewideenoughtoprovideat
least1mofspaceoutboardofthevehicle's
headlampspacing.
Adjustmentscrews
I>Detachsidecarpetinginluggagecompart-
ment.
ThereforeunscrewplasticnutA.
Openthecoveroftheappropriateadjustment
screw.
Thesettingisadjustedbyturningthehexagon
socketscrewsrightorleft,asappropriate.
B-Headlightverticaladjustment
C-Foglightheightadjustment
Verticaladjustment(screw
B)
I>turnclockwise=beammovesdown
turncounterclockwise=beammovesup
Note
I>Donotalterthelateraladjustment.
Foglight
adjustment
Thefoglight
adjustmentCshouldonlybedone
ataspecialistworkshopwithanopticaladjust-
mentunit.
PracticalTips,EmergencyService
237