3208 INDUSTRAIL AND MARINE ENGINES
DISASSEMBLY AND ASSEMLBLY
CRANKSHAFT AND GEAR
INSTALL CRANKSHAFT AND
GEAR 12-1202 & 1204
Dial Test Indicator Group
Install the key for the crankshaft gear on the
Heat the gear for the crankshaft in oil to a
maximum temperature of 300°F (149°C).
Install the gear on the crankshaft gear toward
the crankshaft pulley end of the crankshaft.
Thoroughly clean the area where the upper
halves of the main bearings fit. Install the
upper halves of the main bearings in the
NOTE: The main bearing half with a hole in it is the
Install the thrust bearing for the No. 4 main.
Put clean engine oil on the bearings and
journals of the crankshaft.
Install two of the bolts that hold the flywheel in
place in the end of the crankshaft. Fasten a
hoist and put the crankshaft in position in the
block. Make sure the timing mark on the
crankshaft gear is in alignment with the timing
mark on the camshaft gear.
Clean the main bearing caps and install the
lower halves of the main bearings in the caps.
CAUTION: When installing bearing caps, make sure the
number on the side of the cap is next to and respective
with the number on the engine block.
Check the bearing clearance with wire (B). Put
the caps in position and install the bolts.
Tighten the bolts in number order as follows:
Tighten bolts 1 through 10 to a torque of 30
± 3 lb. ft. (4.1 ± 0.4 mkg).
Put a mark on each bolt head and bearing
cap. Tighten bolts I through 10 120 + 5°