Volvo Penta TAMD61A, Workshop Manual

Page: 80 / 88

78
Repair instructions
6
Install new bearing shells. Make sure that the guide
pin on the bearing shell is correctly located in the
cutouts in the con rod and bearing cap, and that the
oil holes in the con rods and bearing shells line up.
NOTE! Check “Specifications” in the workshop
manual to ensure that the bearing shells have the
correct dimension.
7
Oil the bearing shells and bearing journals with en-
gine oil. Install the bearing caps in accordance with
the markings and torque the screws to
190 ± 10 Nm
(19 ± 1.0 kpm) .
8
Turn the crankshaft until con rods nos. 2 and 5 come
into position, and repeat items 2–7.
9
Turn the crankshaft until con rods nos. 3 and 4 come
into position, and repeat items 2–7.
After you have changed all the big end bearing
shells, turn the crankcase and check that no bearings
run stiff.
Main bearings, replacement
(Crankshaft not removed)
Preparatory work
l
Drain or pump out the engine oil.
l
Remove the sump.
l
Remove the supply and suction pipes for the oil
pump, plus the baffle.
l
Remove the injectors, to make it easier to crank
the engine.
1
Remove the main bearing cap screws for the front
main bearing cap (the front main bearing cap is un-
done together with the oil pump).
2
Turn the crankshaft until the oil hole is free. Put a pin
in the oil supply hole. The pin should be of such a
length that it just pulls the upper bearing shell round
when the crankshaft is turned.
The bearing shell has a heel pressed out which en-
gages in a cutout in the bearing seat in the crank-
case. This heel means that the crankshaft must be
rotated
in the direction of rotation of the engine
(clockwise) when the bearing shell is rolled out.