1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
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3 - 16 ENGINE<br />
NOTE: Crankshaft bearings are not adjustable as no<br />
shims are used. NEVER FILE bearings or bearing caps to<br />
reduce clearance.<br />
1. If all new main bearings are to be Installed, it is advisable<br />
to remove the engine from the chassis and place in a<br />
suitable overhaul stand. See "Engine Removal", page 17.<br />
2. Remove oil pan and trough.<br />
3. Remove main bearing cap screws and remove bearing<br />
caps.<br />
NOTE: Front and rear bearing caps can be easily removed<br />
with Bearing Cap Puller 3-2955, Figure 13.<br />
CAUTION: DO NOT DAMAGE the front end plate<br />
gasket when removing front bearing cap.<br />
4. Thoroughly clean all traces of cotton packing from the<br />
grooves in the case and cap, Figure 18, to avoid clogging<br />
of the oil passages.<br />
Installation:<br />
Recommended total diametral clearance between crankshaft<br />
journals and main bearings is .001. This close clearance<br />
must be maintained when fitting new bearings.<br />
NOTE: <strong>Hudson</strong> main bearings are furnished in standard<br />
or .010 undersize finished reamed, or unfinished (for<br />
shops with line reaming equipment).<br />
SIZE CODE<br />
When replacing crankshafts, the undersize dimension is<br />
located on the front face of No. 1 counterweight.<br />
When replacing main bearings, the .010 undersize dimension<br />
is noted by a spot of green paint and the part<br />
number stamped on the bronze back in indelible ink for<br />
eight cylinder engines. On six cylinder engines the part<br />
number and size are stamped on the steel back of the<br />
bearing shells only. Refer to your 480 series parts book for<br />
proper identification.<br />
Engines built with undersize associate parts are identified<br />
by the following designated marks stamped on the<br />
bottom face of the cylinder block at the left front corner in<br />
a clear area beyond the oil pan gasket.<br />
P.U. means crankshaft has .010 undersize crank pins.<br />
M.U. means crankshaft has .010 undersize main bearing<br />
journals.<br />
P.M.U. means crankshaft has .010 undersize pins and main<br />
bearing journals.<br />
FIGURE 18<br />
5. Remove crankshaft (See "Crankshaft Removal" , page 27.<br />
6. Remove slotted screws retaining bearings in cylinder<br />
block and remove bearings.<br />
In cases where new unfinished bearings are being fitted,<br />
the caps and bearing shell assemblies should be Installed in<br />
the case and tightened to 70 to 75 foot pounds torque, then<br />
line reamed to size.<br />
Crankshaft should have .006 to .012 end play measured<br />
at the center main bearing in each case. When Installing<br />
new factory unreamed shells, it may be necessary to machine<br />
the thrust flange face of the center bearing shells in<br />
order to obtain this amount of end play.