Wisconsin Air Cooled TR-10D, Instruction Book And Parts List

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MI 1069 18
adjustments. When mounting spark plug, tighten 28 to
30 ft. lbs of torque..
VALVES and SEAT INSERT (Fig’s. 22, 23, 24)
Take off valve inspection cover and gasket. By means
of a standard automotive valve lifter, remove retainer
locks and take out valves from top of cylinder block.
Caution: Do not damage breather reed in spring
compartment, when inserting lifter tool.
Clean out carbon and gum deposits from the valves,
seats, ports and guides. Replace valves that are badly
burned, pitted or warped.
The
exhaust valve face and replaceable exhaust seat
insert are of stellite material. The inlet seat is an
integral part of the cylinder block. A positive type
valve rotator is furnished on the exhaust valve. A
faulty rotator may be the cause of a burned exhaust
valve face or seat, and thus should be replaced.
The exhaust valve
seat insert can be removed when
replacement becomes necessary, by means of
Wisconsin Motor DF-66-A insert puller. See Fig. 23.
Grinding of valves and seats should be done by an
authorized Wisconsin service station. See directory in
rear of manual.
Before grinding, inspect valve guides for possible
replacement. Refer to Fig. 25 for proper method of
driving out guides, and see chart, Fig 24 for valve,
seat and guide specifications.
After grinding, lap valves in place until a uniform ring
will show entirely around the face of the valve. Wash
valves and block thoroughly with gasoline or kerosene
and do not assemble valve springs until tappet clear-
ance has been checked. See ‘Tappet Adjustment’.
VALVE GUIDES
When valve stem clearance becomes excessive, the
valve guides should be driven out, as illustrated in
Fig. 25, and new guides pressed in place. Use
Wisconsin Motor DF-72 valve guide driver. In reassem-
bly, press guides into valve ports with the internal
chamfer in guide pointing downward . Refer to Fig. 24
for clearance specifications and proper assembly.