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Vanguard Twin Cylinder OHV Liquid-Cooled Manual

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Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 4 - Engine Overhaul
Page 37
specification. Be careful not to hone oversize or it will be
necessary to resize the cylinder.
NOTE: To produce the proper cross hatch finish
use a drill speed of approximately 200 RPM and
40-60 strokes per minute. Lubricate hone
liberally to prevent build up on finishing stones.
Fig. 67
Cleaning
IT IS MOST IMPORTANT THAT THE ENTIRE
CYLINDER AND CRANKCASE BE THOROUGHLY
CLEANED AFTER HONING. First, wash the cylinder
and crankcase carefully in a solvent such as kerosene or
commercial solvent. Then thoroughly wash cylinder and
crankcase using a stiff brush with soap and hot water.
Rinse thoroughly with hot running water. Repeat
washing and rinsing until all traces of honing grit are
gone.
Honing grit is highly abrasive and will cause rapid wear
to all of the internal components of the engine unless it is
completely removed.
NOTE: When cylinder and crankcase have been
thoroughly cleaned, use a clean white rag or
napkin and wipe the cylinder bore. If honing grit
is present, it will appear as a gray residue on rag.
If any honing grit is evident, re-wash and rinse
entire cylinder and crankcase and check again.
When there is no trace of honing grit on rag, the
cylinder is properly cleaned. Then oil cylinder
bore to prevent rusting.
BEARINGS
Check Mag Bearing
Check magneto bearing for wear or damage, Fig. 68.
If bearing is worn or damaged, the cylinder must be
replaced.
Fig. 68
Check Camshaft Bearings
Check camshaft bearings in cylinder and crankcase
cover for wear or damage, Fig. 69.
If bearings are worn or damaged, the cylinder or
crankcase cover must be replaced.
Fig. 69
VECTOR
APPROXIMATLY 45°
Reject Dimension: 1.7765” - (45.12 mm)
Reject Dimension: .790” (20.06 mm)
… 42 …


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