Volvo Penta TD520GE Workshop Manual page 78

Checks and adjustments
88
Crankshaft journals
6. Check that the big-end bearing cap matches the
connecting rod so that hte number markings are
turned towards each other and are identical.
NOTE! Make sure the locating pegs are in place.
7. Fit the big-end bearing cap. Tighten the screws
according to specification.
Initial torque: 30 Nm (22 lb ft)
NOTE! Only when measuring.
8. Set the dial gauge to ........................... 72.5 mm
(2.85").
9. Procedure for measuring the big-end bearing
diameter at planes "1" and "2" in points "a" and "b".
Big-end bearing diameter: ...................... 72.5
+0.002
(2.854 ")
NOTE! If the measured values are just a little out,
take additional measurements when new bearing
shells have been fitted.
10. Remove the bearing cap and fit new bearing
shells. Replace the bearing cap. Tighten the
screws according to specification.
Initial torque: ............................... 30 Nm (22 lb ft)
NOTE! Only when measuring.
11. Set the dial gauge. Measure the bearing shells at
planes "1" and "2" in points "a" and "b".
Big-end bearing shells
Inside diameter: ............................. 68.03
(2.68 +0.002 ")
Oversize:
0.25 mm ...................................... 67.78
+0.002
(2.67 ")
0.50 mm ....................................... 67.53
+0.002
(2.66 ")
Wear limit:
Radial play for big-end bearings: ............ 0.12mm
(0.005")
NOTE! If the wear does not exceed the bearing toler-
ances by more than 0.015 mm (0.0006"), you can still
use the connecting rod. If the limit value is exceeded,
change the connecting rod.
Group 21
+0.02
+0.04
mm
+0.04 mm
+0.04
mm