GENERAL SUPPORT MAINTENANCE
ADVANCED AVIATION FORWARD AREA REFUELING SYSTEM MODEL M100A1
Follow good engineering practice during engine assembly. Clean and inspect all parts before assembly. Replace any part
which is damaged or out of tolerance. Use assembly lube (WP 0116 00, Item 3) 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.
INSTALL CRANKSHAFT AND REAR CRANKSHAFT SUPPORT (Refer to Figures 1, 2 and 3.)
Screwdriver, Flat Blade
Thickness Gauge, 0.006
Extension, 6 in., 3/8 in. drive
Socket, Socket Wrench, 6 mm
Rear crankshaft support removed
Remover, Bearing and Bushing
Central Bearing Assembly Tool
Refer to Figure 1.
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.
Measurement A (Bearing Support Outer Diameter): 4.645-4.646 in. (117.99-118.01 mm).
Measurement B (Bearing Support Inner Diameter): 1.888-1.889 in. (47.965-47.985 mm).
Measurement C (Bearing Support Thickness): Not less than 1.06 in. (27 mm).
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. Check for
excessive wear in accordance with the following. If any measurement is out of tolerance, replace the crankshaft.
Measurement D (Main and End Journals): 1.772-1.769 in. (45.01-44.93 mm).
Measurement E (Connecting Rod Journals): 1.575-1.572 in. (40.005-39.925 mm)
Install crankshaft bearing halves (2) in center bearing support halves (1).
Line up the matching reference numbers on the center bearing support halves (1) and install the center bearing support
halves around the crankshaft (3).
Install two 6 mm crankshaft support screws (4).
Torque crankshaft support screws to 190 to 195 in. lbs (21-23 Nm).