Volvo Penta D2-55, Workshop Manual

Page: 37 / 108

35
Group 21 Short block
Inspection of front crankshaft bush
Check the bearing play between the crankshaft journal
and the bush. Use both internal and external microme-
ters.
1. Measure the bushes inner diameter at points 1
and 2. Measure in two directions (“A” and “B”) at
each point.
2. Measure the bearing journal outer diameter and
calculate the bearing play (difference between pre-
vious measurement and max. diameter of the
bearing journal).
Max bearing clearance, please refer to “Technical
Data”.
Change the bush if the clearance exceeds the
permissible value. If necessary, the crankshaft
can be ground to a suitable undersize and the
bush replaced with a corresponding oversize.
Check the bearing play again before the crank-
shaft is installed, if grinding has been performed.
Replacement of front crankshaft
bush
1. Remove the bush from the cylinder block.
2. Check that the bush contact surface in the hous-
ing has no burrs or deformities.
3. Mark a line across the hole in the housing and the
bush with a marker pen. Oil the outside of the
bush and the contact surface in the housing.
4. Place the bush (1) in the cylinder housing.
IMPORTANT! Place the bush so that the oil hole
is correctly positioned in the cylinder block. The
oil groove (2) in the bush must be furthest in.
Tap the bushing in with a suitable mandrel (3) until
it lines up with the cylinder block.
5. Check that the oil channels are open are pressing
in. Check also that the inner diameter of the bush
is the same as the crankshaft diameter.