Measure crankshaft (Z 14 XE, Z 16 YNG)
1. |
Condition: engine dismantled
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2. |
Insert 10 crankshaft bearing shells
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Observe identification and allocation
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Note position of axial bearing
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In cylinder block, crankshaft bearing cap
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4. |
Attach 5 crankshaft bearing covers
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Observe identification and allocation
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Tighten 10 bolts
Note: Bolts do not have
to be replaced when checking crankshaft alignment.
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Tightening torque 50 Nm + 45° +
15°
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5. |
Attach MKM-571-B
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Install MKM-571-B in bracket
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Attach bracket to transmission side of cylinder block
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6. |
Adjust MKM-571-B
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Attach probe to crankshaft flange
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Attach MKM-571-B under
pre-tension
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7. |
Measure crankshaft end play
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Read off test value
Note: Repeat
measurement several times. For permitted crankshaft end play see
"Technical Data - crank drive, cylinder block"
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9. |
Remove 5 crankshaft bearing covers
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10. |
Attach MKM-571-B
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Attach to cylinder block with bracket
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11. |
Adjust MKM-571-B
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Attach probe to crankshaft bearing journal
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Attach MKM-571-B under
pre-tension
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12. |
Measure crankshaft concentricity deviation
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Read off test value
Note: For permitted
crankshaft concentricity deviation see "Technical Data - crank
drive, cylinder block"
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15. |
Measure diameter of 5 crankshaft bearing journals
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Measure in 2 places (I + II) per bearing using micrometer
gauge
Note: Note dimensions -
if a dimension is outside the permitted tolerance, the crankshaft
must be ground or replaced.
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16. |
Attach 5 crankshaft bearing covers
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Observe identification and allocation
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Tighten 10 bolts
Note: Bolts do not have
to be replaced when checking crankshaft alignment.
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Tightening torque 50 Nm + 45° +
15°
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17. |
Set up internal measuring instrument
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Fit appropriate probe tip to internal measuring instrument
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Fit MKM-571-B to internal measuring
instrument with approx. 1 mm of pre-tension
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Slide internal measuring instrument between micrometer gauge
test surfaces
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Determine indicator turning point
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Oscillate internal measuring instrument between test
surfaces
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Set MKM-571-B to "0" at turning
point
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18. |
Measure diameter of 10 crankshaft bearing bores
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Determine turning point in 2 places (I+II) per bearing
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Oscillate internal measuring instrument in crankshaft bearing
hole
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19. |
Calculate crankshaft bearing play (5 times)
Note: The crankshaft
bearing play is calculated on the basis of the difference between
the crankshaft bearing bore and crankshaft bearing journal
diameters. For permitted crankshaft bearing play see "Technical
Data - crank drive, cylinder block"
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20. |
Remove 5 crankshaft bearing covers
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21. |
Remove10 crankshaft bearing shells
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22. |
Measure diameter of 4 con-rod journals
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Measure in 2 places (I, II) using micrometer gauge
Note: Note dimensions -
if a dimension is outside the permitted tolerance, the crankshaft
must be ground or replaced.
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23. |
Insert 8 con-rod bearing shells
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Observe identification and allocation
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In con-rod, con-rod bearing cap
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24. |
Attach 4 con-rod bearing caps
Important: The mating surfaces of
the cod-rods and con-rod bearing caps form an individual fit and
must not be damaged or interchanged. Do not lay on mating
surfaces.
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Observe identification and allocation
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Tighten 8 bolts
Note: Bolts do not have
to be replaced when measuring con-rod bearing play.
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Tightening torque 25 Nm +
30°
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25. |
Reconfigure internal measuring instrument
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Fit appropriate probe tip to internal measuring instrument
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Fit MKM-571-B to internal measuring
instrument with approx. 1 mm of pre-tension
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Slide internal measuring instrument between micrometer gauge
test surfaces
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Determine indicator turning point
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Oscillate internal measuring instrument between test
surfaces
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Set MKM-571-B to "0" at turning
point
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26. |
Measure diameter of 4 con-rod bearing bores
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Determine turning point in 2 places (I, II)
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Oscillate internal probe in con-rod bearing bore
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27. |
Calculate con-rod bearing play (4 times)
Note: The con-rod
bearing play is calculated on the basis of the difference between
the con-rod bearing bore and con-rod bearing journal diameters. For
permitted con-rod bearing play see "Technical Data - crank drive,
cylinder block"
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28. |
Remove 4 con-rod bearing caps
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29. |
Remove 8 con-rod bearing shells
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30. |
Dismantle internal measuring instrument
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