ENGINE
CS-2511TES
251Ts, 251TCs
66
8-10 Replacing oil seal and ball bearing
{Disassembling}
1. After disassembling crankshaft, check ball bear-
ing for smooth rotation. If rough, replace it (them)
with new one.
NOTE:
At the same time, replace oil seal with new
one.
2. Remove ball bearing (C) from crankcase half
using bearing tool 897701-14732 as follows.
3. Set shaft (A) through oil seal (B) and ball
bearing (C) with boss (D) as shown.
4. Tighten shaft (A) with wrench to remove ball
bearing (C). Oil seal (B) remains in crankcase
bore.
5. Push out oil seal (B) with using oil seal tool
897726-09130 (E)
{Assembling}
6. Set new ball bearing (C) with shaft (A), adapter
(F) (inner dia. 15 mm, outer dia. 40 mm) and boss
(D).
NOTE:
Set adapter (F) mating full flat side to ball
bearing.
7. Tighten shaft (A) with wrench to press ball bear-
ing into the crankcase half until flush.
8. Check that bearing rotates smoothly.
9. Apply lithium based grease on inner rubber lips
of new oil seal (A).
10. Lubricate circumferences of new oil seal with
2-stroke oil.
11. Push in new oil seal (B) until flush with crank-
case surface using oil seal tool 897726-09130 (E).
A
B
C
D
E
B
C
A
F
D
