Echo CS-271T - Page 58

ENGINE
CS-271T
56
8-8 Inspectingcrankcaseandcrankshaft
1. Clean crankcase. Replace as a set of cylinder
and crankcase if damaged.
2. Completely remove sealant residue on mating
surfaces and bearing bore of crankcase using
wooden or plastic scraper, or chemical gasket re-
mover.
3. Measure crankshaft runout and replace if it
exceeds service limits (Refer to “1-5”). Replace
crankshaft assembly if the connecting rod bearing
is rough, damaged, or discolored. Replace crank-
shaft assembly if plastic parts (A) are damaged.
8-9 Replacingoilsealandballbearing
1. Check oil seal(s) and replace if defective.
2. Check ball bearing(s) for smooth rotation. If not,
remove ball bearing(s) using bearing wedge (A)
89770102830.
3. Install new ball bearing(s) onto crankshaft using
bearing/seal tool 89772621430 (B). Bearing should
be completely seated against crankshaft counter-
weights.
NOTE: Preheat ball bearing using heating gun,
heat lamp, or suitable heater for easier installation.
4. Install oil seals onto both ends of crankshaft in-
suring proper direction of oil seal.
B
A
A
A