Honing To Oversize; Cylinder Hone Selection / Honing Procedure; Cleaning The Cylinder After Honing - Taylor-Dunn G0-010-00 Service And Replacement Parts Manual

ENGINE / COOLING SYSTEM

HONING TO OVERSIZE

CAUTION
If cylinder wear or damage is excessive, it will be
necessary to oversize the cylinder using a new
oversized piston and rings. This may be accomplished
by either boring the cylinder and then finish honing to
the final bore size, or by rough honing followed by finish
CAUTION
For oversize honing always wet hone using honing oil
and a coarse roughing stone. Measure piston (see
piston measurement) and calculate finished bore size.
Always leave .002 - .003" (.05 - .07 mm) for finish bore
sizing with a fine stone.
A finished cylinder should have a 45 degree cross-hatch
pattern to ensure piston ring seating, aid in oil retention
and reduce ring vibration during initial break-in. Hone
cylinder according to hone manufacturer's instructions,
or these guidelines:
• Use a motor speed of approximately 300-500 RPM,
run the hone in and out of the cylinder rapidly until
cutting tension decreases. Remember to keep the
hone drive shaft centered (or cylinder centered on
arbor) and to bring the stone approximately 1/2" (1.3
cm) beyond the bore at the end of each stroke.
• Release the hone at regular intervals and inspect the
bore to determine if it has been cleared, and to check
piston fit.
NOTICE
Do not allow cylinder to heat up during honing.
3.58
honing.
CYLINDER HONE SELECTION / HONING
PROCEDURE
CAUTION
Selecting a hone which will straighten as well as
remove material from the cylinder is very important.
Using a common spring loaded finger type glaze
breaker for honing is never advised. TAYLOR-DUNN
recommends using a rigid hone or arbor honing
machine which also has the capability of oversizing.
Cylinders may be wet or dry honed depending upon the
hone manufacturer's recommendations. Wet honing
removes more material faster and leaves a more distinct
pattern in the bore.

CLEANING THE CYLINDER AFTER HONING

It is very important that the cylinder be thoroughly
cleaned after honing to remove all grit material. Wash the
cylinder in a solvent, then in hot, soapy water. Pay close
attention to areas where the cylinder sleeve meets the
aluminum casting. Use electrical contact cleaner if
necessary to clean these areas. Rinse thoroughly, dry
with compressed air, and oil the bore immediately with
engine oil.
9929758 R01 - 2019 TAYLOR-DUNN G-100 Service Manual
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