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TM 10-4320-351-14
6.4 ASSEMBLE ENGINE.
Follow good engineering practice during engine assembly. Clean and inspect all parts before assembly. Replace any
part that is damaged or out of tolerance. Use assembly lube or equivalent on all mechanical parts to prevent damage
during first start of reassembled engine. Clean oil passages in block and all components before assembly.
6.4.1 Install Crankshaft.
This task consists of:
a. Installation
Refer to Figure 6-22.
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Screwdriver, Flat blade
Bearing (Appendix I, Item 12)
(Appendix B, Section III, Item 3)
Bearing (Appendix I, Item 13)
Thickness Gauge, 0.006
(Appendix B, Section III, Item 3)
Wrench, Torque, 0-300 in. lb
(Appendix B, Section III, Item 3)
Extension, 6 in., 3/8 in. drive
(Appendix B, Section III, Item 3)
Equipment Condition:
Socket, Socket wrench, 6 mm
Crankshaft removed (para. 6.3.18)
(Appendix B, Section III, Item 3)
Center Bearing Mounting Tool
(Appendix B, Section III, Item 7)
Bushing Extractor Tool
(Appendix B, Section III, Item 6)
Gloves, Welder
(Appendix B, Section III, Item 3)
a.
Temporarily reassemble the two halves (1) of the center crankshaft bearing support. Check for excessive wear of
the center crankshaft bearing support as follows. If any measurement is out of tolerance, replace the bearing
support.
(1)
Measurement A (Bearing Support Outer Diameter): 4.645-4.646 in. (117.99-118.01 mm).
(2)
Measurement B (Bearing Support Inner Diameter): 1.888-1.889 in. (47.965-47.985 mm).
(3)
Measurement C (Bearing Support Thickness): Not less than 1.06 in. (27 mm).
b.
Measure diameter of crankshaft main journal, the two end journals and the two connecting rod journals. Measure
again at points that are 90° from first measurement. Use the smaller of the two numbers for each measurement.
Use the smaller of the two numbers for each measurement. Check for excessive wear in accordance with the
following. If any measurement is out of tolerance, replace the crankshaft.
(1)
Measurement D (Main and End Journals): 1.772-1.769 in. (45.01-44.93 mm).
(2)
Measurement E (Connecting Rod Journals): 1.575-1.572 in. (40.005-39.925 mm).
c.
Install crankshaft bearing halves (2) in center bearing support halves (1).
6-36
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