10 75-12
10 75-12
1
10 75-12
SUBJECT
DATE
Installation of the Crankshaft
October 2012
Additions, Revisions, or Updates
Publication Number / Title
DDC-SVC-MAN-0081
Platform
Section Title
Change
DD Platform
Installation of the
Crankshaft
Added note to replace the bearings if crankshaft is being replaced.
All information subject to change without notice.
10 75-12 Copyright © 2012 DETROIT DIESEL CORPORATION
3
2 Installation of the Crankshaft
2
Installation of the Crankshaft
Install as follows:
WARNING: EYE INJURY
To avoid injury from flying debris when using compressed air, wear adequate eye protection (face
shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure.
1. Steam clean the crankshaft to remove the rust preventive and blow out the oil passages with compressed air.
2. Install the upper main bearing shells in the block. If the old bearing shells are to be used again, install them in the same
locations from which they were removed.
NOTE: When a new crankshaft is installed, ALL new main and connecting rod (upper and lower) bearing shells
and new thrust washers must also be installed.
3. Install the thrust washer upper halves in the counterbores on either side of the No. 6 bearing saddle. Coat the backs of
the thrust washers (without oil grooves) with petroleum jelly and install with the oil-grooved sides facing away from
the saddle.
4. Apply clean engine oil 360 degrees around all crankshaft bearing journals and install the crankshaft.
NOTE: The main bearing caps are bored in position and stamped with position number. They must be installed in
their original positions with the marked (numbered) side of each cap toward the cooler side of the cylinder block.
NOTE: If the crankshaft is being replaced, ensure the connecting rod bearings, main bearings and thrust bearings
are replaced as well.
5. Install the lower main bearing shells in the main bearing caps as follows:
a. Align the tang on the lower main bearing shell with the groove in the main bearing cap. Install the bearing shell
to the main bearing cap.
b. If the old bearing shells are to be used again, install them in the same bearing caps from which they were
removed.
6. Check the main bearing cap bolt length.
4
All information subject to change without notice.
Copyright © 2012 DETROIT DIESEL CORPORATION 10 75-12
10 75-12
Table 1.
DD13
175.5 mm (6.909 in.)
DD15 and DD16
200.5 mm (7.894 in.)
7. Install the main bearing caps together with lower bearing shells in place.
8. Apply a small quantity of clean engine oil to the bolt threads and underside of the bolt heads. Install the main bearing
cap bolts and draw them up snug.
9. Torque the main bearing cap bolt to 50 N·m (37 lb·ft).
10. Check the crankshaft end play as follows:
a. Move the crankshaft toward the gauge with a small 304 mm (less than 12 in.) pry bar. Keep a constant pressure
on the pry bar and zero the pointer on the dial indicator.
b. Remove and insert the pry bar on the other side of the bearing cap. Force the crankshaft in the opposite direction
and note the amount of end play on the dial.
c. The end play should be 0.099-0.419 mm (0.0039-0.0165 in.). Insufficient end play can be the result of a
misaligned No. 6 main bearing, a misaligned upper thrust washer or a burr or dirt on the inner face of one or more
of the thrust washers.
NOTE: If the bearings have been installed properly, the crankshaft will turn freely with all of the main bearing cap
bolts drawn to the specified torque.
11. For the DD13; torque all of the main bearing cap bolts, in three steps, using the sequence shown below. Torque the
main bearing cap bolts to:
a. 150 N·m (111 lb·ft)
b. 300 N·m (221 lb·ft)
c. 90° torque turn
12. For the DD15 and DD16; torque all of the main bearing cap bolts, in four steps, using the sequence shown below.
Torque the main bearing cap bolts to:
a. 150 N·m (111 lb·ft)
b. 250 N·m (184 lb·ft)
c. 1st 90° torque turn
d. 2nd 90° torque turn
13. Install the piston and connecting rod assemblies. Refer to section "Installation of the Piston and Connecting Rod
Assembly" .
14. If removed, install the cylinder head.
Refer to section "Installation of the DD13 Cylinder Head" .
All information subject to change without notice.
10 75-12 Copyright © 2012 DETROIT DIESEL CORPORATION
5
2 Installation of the Crankshaft
Refer to section "Installation of the DD15 and DD16 Cylinder Head" .
If removed, install the camshaft housing. Refer to section "Installation of the Camshaft Housing" .
If removed, install the gear train. Refer to section "Installation and Timing of Engine Gear Train" .
Install the flywheel housing. Refer to section "Installation of the Flywheel Housing" .
Replace the rear crankshaft oil seal with new seal. Refer to section "Installation of the Rear Crankshaft Oil Seal" .
Install the flywheel. Refer to section "Installation of the Flywheel" .
Install the oil pump, inlet and outlet pipes. Refer to section "Installation of the Oil Pump, Oil Suction Manifold, and Oil
Lines" .
21. Replace the front crankshaft oil seal with new seal. Refer to section "Installation of the Front Crankshaft Oil Seal" .
22. Install the crankshaft pulley and vibration damper assembly. Refer to section "Installation of the Vibration Damper" .
23. Install the oil pan. Refer to section "Installation of the Oil Pan" .
15.
16.
17.
18.
19.
20.
WARNING: PERSONAL INJURY
To avoid injury when removing or installing a heavy engine component, ensure the component is
properly supported and securely attached to an adequate lifting device to prevent the component
from falling.
24. Use a cylinder head/engine lifting bar tool (W470589006200) with hooks attached to the lifting brackets at each end of
the engine and remove the engine from the overhaul stand.
25. Remove the overhaul stand adaptor plate from the engine block.
26. Install any accessories that were removed.
27. Install the engine to the equipment from which it was removed.
28. Fill the cooling system. Refer to section "Cooling System Fill Procedure" .
29. Prime engine lubrication system. Refer to section "Priming the Engine Lubrication System" .
30. After replacing the main or connecting rod bearings or installing a new crankshaft, verify repairs.
6
All information subject to change without notice.
Copyright © 2012 DETROIT DIESEL CORPORATION 10 75-12
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