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1106 Perkins motor - Crankshaft Main Bearings (Remove and Install)
Removal Procedure
Remove:
- the engine oil pump.
- the crankshaft rear seal. Ensure that the main bearing cap is marked
for the correct location and orientation.
- the two setscrews (1) and the main bearing cap (2) from the cylinder
block.
- the lower main bearing shell (3) from the main bearing cap (2). Keep
the main bearing shell and the main bearing cap together. The lower main
bearing shell is a plain bearing that has no oil holes.
For number six main bearing, remove the two thrust washers (4) from the
cylinder block. In order to remove the thrust washers (4), use Tooling
to rotate the crankshaft in the correct direction. If necessary, push
the crankshaft toward the front of the 1106 Perkins motor or push the
crankshaft toward the rear of the engine while you rotate the
crankshaft, in order to aid removal. The thrust washers have a locating
tab at one end.
Push out the upper main bearing shell (5) with a suitable tool from the
side opposite the locating tab. Carefully rotate the crankshaft while
you push on the bearing shell. Remove the upper main bearing shell (5)
from the cylinder block. Keep the bearing shells together. The upper
main bearing shell has a groove and two oil holes.
Installation Procedure
Ensure that the main bearing shells are clean and free from wear or
damage. If necessary, replace the main bearing shells. Clean the
journals of the crankshaft. Inspect the journals of the crankshaft for
damage. If necessary, replace the crankshaft or recondition the
crankshaft.
Lubricate the crankshaft journal and the upper main bearing shell (5)
with clean engine oil. Slide the upper main bearing shell (5) into
position between the crankshaft journal and the cylinder block. Ensure
that the locating tab for the upper main bearing shell is correctly
seated in the slot in the cylinder block. The upper main bearing shell
has a groove and two oil holes.
For number six main bearing, ensure that the two thrust washers (4) are
clean and free from wear or damage. If necessary, replace the thrust
washers. Lubricate the thrust washers (4) with clean motor oil. Slide
the thrust washers (4) into position between the crankshaft and the
cylinder block. Ensure that the locating tab is correctly seated in the
1106 Perkins cylinder block.
Install the lower main bearing shell (3) into the main bearing cap (2).
Ensure that the locating tab for the lower main bearing shell is
correctly seated into the slot in the bearing cap. The lower main
bearing shell is a plain bearing that has no oil holes.
Lubricate the crankshaft journal and the lower main bearing shell with
clean engine oil. Install the main bearing cap (2) to the cylinder
block. Ensure the correct orientation of the main bearing cap. The
locating tab for the upper and the lower bearing should be on the same
side of the engine. Lubricate the threads of the setscrews (1) with
clean engine oil. Lubricate the underside of the heads of the setscrews
(1) with clean motor oil.
Install the setscrews (1) to the main bearing cap (2). Evenly tighten
the setscrews in order to pull the cap (2) into position. Ensure that
the cap is correctly seated. Do not tap the main bearing cap into
position as the bearing shell may be dislodged. Tighten the setscrews
(1) to a torque of 80 Nm (59 lb ft). Turn the setscrews (1) through an
additional 90 degrees. Use Tooling to achieve the correct final torque.
Check the crankshaft end play. Push the crankshaft toward the front of
the engine.
Install:
- Tooling to the cylinder block and the rear face of the crankshaft.
Push the crankshaft toward the rear of the engine. Use Tooling to
measure the crankshaft end play. The permissible crankshaft end play is
0.17 mm (0.007 inch) to 0.41 mm (0.016 inch).
- the crankshaft rear seal.
- the engine oil pump.
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