Volvo Penta TD520GE Workshop Manual page 75

Group 21
4. Measure the main bearing diameter at points "1"
and "2" in planes "a" and "b".
Inner diameter, Ø ...... 85,03
Oversize:
0.25 mm .................. 84,78
0.50 mm .................. 84,53
Crankshaft bearings
5. Set the dial gauge to .................... 38 mm (1.5").
6. NOTE! Before working on the crankshaft,
measure the width of the new crankshaft
bearings, see step 8.
Measure the width of the thrust bearing journal
(use an internal dial gauge).
Bearing journal width: ................... 38.00
+0.002
(1.5" ")
Oversize:
0.40 mm ...................................... 38.40
(1.512 +0.002 ")
7. Measure the width of the crankshaft thrust bearing
journal and note of measurement "a".
Example:
Measurement "a" = 38.02
8. Locate the half thrust bearings on the main bear-
ing cap. Measure and note the width, measure-
ment "b".
9. Determine the axial clearance.
Example:
Measurement "a" = 38.02 mm (1.5")
Measurement "b" = 37.90 mm (1.49")
"a" – "b" = axial clearance = 0.12 mm (0.005")
Permitted axial clearance = 0.10 - 0.30 mm
(0.004" - 0.018")
Checks and adjustments
+0.036 +0.001
mm (3.347 ")
+0.036 mm (3.338 +0.001 ")
+0.036 mm (3.328 +0.001 ")
+0.06
mm
+0.06 mm
85