1956 AMC Hudson Technical Service Manual Supplement
1956 AMC Hudson Technical Service Manual Supplement
1956 AMC Hudson Technical Service Manual Supplement
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12 TECHNICAL SERVICE MANUAL<br />
If the bearing clearance is excessive, the correct undersize<br />
bearing insert (pair) should be installed in the connecting<br />
rod.<br />
The correct connecting rod bearing clearance is<br />
.0007" to .0028".<br />
The crankpin diameter is 2.2483" to 2.2490".<br />
It is important that the connecting rod bearing cap bolt<br />
nuts be drawn up to 52 to 56 foot pounds torque.<br />
Connecting rod bearings are serviced in .001"-<br />
.002"-.010"-.012" undersize.<br />
CRANKSHAFT<br />
The crankshaft is a drop forged steel shaft, counterweighted<br />
and balanced independently. There are five main bearings<br />
and four crankpins. It is provided with an oil slinger at reat<br />
with an oil slinger at rear journal inboard of the<br />
rear oil seal.<br />
The component parts of the crankshaft assembly are individually<br />
balanced, and then the complete assembly is balanced<br />
as a unit. Replacement of crankshaft, flywheel, or<br />
vibration damper can be accomplished without rebalancing<br />
the complete assembly.<br />
Main Bearing Journals<br />
Main bearing journals can be measured without removing<br />
the crankshaft from the engine block. Various gauges are<br />
available for this purpose. Always check both ends of the<br />
journal to note the taper. Then rotate the shaft 90° and<br />
measure for out of round.<br />
1. Oil Passage, Oil Filter Supply 2. Upper and Lower Rear Main Oil Seal 3. Rear Main Oil Seal Side Grooves<br />
FIGURE 20—Main Bearing Arrangement
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