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LUBRICATION SYSTEM:
All Tecumseh Vertical shaft 4-cycle engines use a
positive displacement plunger oil pump to pump oil from
the crankcase, up through the camshaft to a passage
in the breather box to the top crankshaft main bearing,
and ultra balance bearings.
Oil is pressure sprayed out of a small hole between the
crankshaft and ultra-balance bearing, to lubricate the
connecting rod journal area. If a heavy leakage is noted
from the breather cover check for plugged mist hole.
OIL PUMP. An eccentric on the camshaft works the
plunger in the barrel back and forth, forcing oil up the
center of the camshaft. A ball on the end of the plunger
locates in a recess in the flange cover. When installing
oil pump, make certain the chamfered side of the pump
barrel faces the camshaft, and the plunger ball seats in
the recess of the flange cover.
This engine has a top mounted integral breather.
OIL RETURN
FILTER ELEMENT
BREATHER TUBE
FROM CAMSHAFT
OIL PASSAGE
MAIN BEARING LUBE HOLE
OIL MIST HOLE
SPRAY MIST HOLE
BREATHER OIL RETURN HOLE
OIL DRAIN
HOLE
CHAMFER UP
BREATHER CHECK VALVE
Not For Resale
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