Group 21 Engine Body
135
Main Bearing
Bearing surfaces
Inspect each bearing shell for abnormal contact such
as scratching, corrosion, flaking, etc. Also check for
signs of poor seating in the bore of the crankcase or
bearing cap.
Bearing thickness
Use a ball point micrometer to measure the center of
each hearing shell. If the service limit is exceeded on
any of the shells, replace the upper and lower shells
as a set.
Main bearing thickness (center) STD, mm [in]
Nominal value ...........
4.500
[0.17717]
Assembly standard ...
4.467–4.480
[0.17587–0.17638]
Service limit ..............
4.425
[0.17421]
Main bearing thickness (center) –0.25 [0.0098],
mm [in]
Nominal value ...........
4.625
[0.18209]
Assembly standard ...
4.592–4.605
[0.18079–0.18130]
Service limit ..............
4.550
[0.17913]
Main bearing thickness (center) –0.50 [0.0197],
mm [in]
Nominal value ...........
4.750
[0.18701]
Assembly standard ...
4.717–4.730
[0.18571–0.18622]
Service limit ..............
4.675
[0.18405]
Main bearing thickness (center) –0.75 [0.0295],
mm [in]
Nominal value ...........
4.875
[0.19193]
Assembly standard ...
4.842–4.855
[0.19063–0.19114]
Service limit ..............
4.800
[0.18898]
Main bearing thickness (center) –1.00 [0.0394],
mm [in]
Nominal value ...........
5.000
[0.19685]
Assembly standard ...
4.967–4.980
[0.19555–0.19606]
Service limit ..............
4.925
[0.19390]
NOTE!
Four undersizes are available for the main
bearings; -0.25 mm [-0.0098 in], -0.50 mm [-0.0197
in], -0.75 mm [-0.0295 in] and –1.00 mm [-0.0394].
Replace main bearings.
If the thickness exceeds the service limit, either re-
place the main bearings as above, or refinish the
crankshaft and use undersize bearings.
Plus d'informations sur : www.dbmoteurs.fr
Summary of Contents for D65A MS
Page 1: ...Workshop Manual H 2 0 D65A MS D65A MT Plus d informations sur www dbmoteurs fr ...
Page 2: ...Plus d informations sur www dbmoteurs fr ...
Page 212: ...Notes Plus d informations sur www dbmoteurs fr ...
Page 213: ...Notes Plus d informations sur www dbmoteurs fr ...
Page 214: ...Notes Plus d informations sur www dbmoteurs fr ...
Page 215: ...Plus d informations sur www dbmoteurs fr ...
Page 216: ...7742853 0 English 09 2003 Plus d informations sur www dbmoteurs fr ...