Crankshaft Bearing Service - Tecumseh ECV100 - 120 Technician's Handbook

Oil Seal Service
NOTE: BEFORE REMOVING THE OIL SEAL, CHECK TO
SEE IF THE SEAL IS RAISED OR RECESSED. WHEN
INSTALLING A NEW OIL SEAL, TAP IT INTO POSITION
GENTLY UNTIL IT IS SEATED INTO ITS BOSS. SOME
SEALS ARE NOT POSITIONED FLUSH TO THE
CYLINDER COVER. ATTEMPTING TO INSTALL THE SEAL
TOO FAR IN CAN CAUSE DAMAGE TO THE OIL SEAL
AND ENGINE.
If the crankshaft is removed from the engine, remove the
old oil seals by tapping them out with a screwdriver or punch
from the inside. If the crankshaft is in place, remove the
seal by using the proper oil seal puller (diag. 54).
Select the proper seal protector and driver from the tool list
in Chapter 11 to install a new oil seal. Place the oil seal
over the protector (spring side of seal faces inward) and
place it over the crankshaft. Drive the seal into position
using the universal driver part no. 670272. The seal protector
will insure that the seal is driven in to the proper depth
(diag. 55).

CRANKSHAFT BEARING SERVICE

Ball Bearing Service (H40-HM100 engines)
To remove the ball bearing from the cylinder cover, the
bearing locks will have to be rotated out of the way. First
loosen the locking nuts with a socket. Turn the retainer
bolts counterclockwise to the unlocked position with a
needle nose pliers (diag. 56). The flat side of the retainer
will face away from the bearing in the unlocked position
(diag. 57).
When reinstalling the locks, the flat side must face the
bearing while the locking nuts should be torqued to
15-22 inch pounds (1.695 - 2.486 Nm).
To remove a ball bearing from the crankshaft, use a bearing
splitter and a puller (diag. 58).
When installing the ball bearing to the crankshaft, the
bearing must be heated by either using a hot oil bath or
heat lamp to expand the bearing. This will allow the bearing
to slide on the crankshaft with no interference fit. Be careful
to use adequate protection handling the hot ball bearing.
The bearing and the thrust washer must seat tightly against
the crankshaft gear.
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54
55
56
57
58