Specifications

38
SECTION 2. BEARINGS
BEARING ASSEMBLY. The following figure illustrates
the correct assembly of the tapered crankshaft bearings.
The bearing at the flywheel end of the crankshaft
seats in an adjustable bearing cup “A” in the cylinder.
The bearing cup “B” supporting the P.T.O. end of
the crankshaft is a press fit in the cylinder cover.
Examine the bearing for wear, pitting, rust, alignment,
and uneven wear of the rollers. If in doubt, replace
to assure dependable trouble free service.
BEARING REMOVAL. Remove the bearing by securing
a bearing separator between the bearing and crankshaft
gear. Secure jaws of puller on the separator and
draw bearing off shaft.
THIS SYMBOL POINTS OUT IMPORTANT
SAFETY INSTRUCTIONS WHICH IF NOT
FOLLOWED COULD ENDANGER THE
PERSONAL SAFETY AND/OR PROPERTY OF
YOURSELF AND OTHERS. READ AND FOLLOW
ALL INSTRUCTIONS.
BEARING INSTALLATION. Use only new bearings
for installation on the crankshaft. Once a bearing
has been removed it MUST be REPLACED as it
becomes distorted and damaged while being removed.
The new bearing may be installed on the crankshaft
with pressure or heat. Heating the bearing is the
preferred method.
METHOD ONE - Using Heat. Heat the bearings in
engine oil. Support the bearing off the bottom of
the container as illustrated.
Heat to approximately 300° F (148° C) or until
oil smokes. Support the crankshaft in a vise. Hold
the bearing carefully to prevent burns. Work rapidly
to assure proper placement while the bearing is hot.
The bearing must seat tight against the shoulder of
the magneto end and tight against the crankshaft
gear on the P.T.O. end. (If on a counterweight system,
bearing should be against counterweight gear.)
CYLINDER COVER
STEEL WASHER
IF REQUIRED
BEARING CUP
“B”
BOTTOM ON
SHOULDER
ROLLER BEARING
“O” RING
“A”
SHIM GASKET
BEARING
BEARING
SEPARATOR
OIL LEVEL
BEARING HELD OFF
BOTTOM OF CONTAINER
NEW BEARING