Echo CS-2511TES - 8-9 Inspecting crankcase and crankshaft

ENGINE
CS-2511TES
251Ts, 251TCs
65
8-9 Inspectingcrankcaseandcrankshaft
1. Remove cylinder, gasket and piston.
2. Remove woodruf key (A) from crankshaft fly-
wheel end (B).
3. Remove three bolts (C) from crankcase assem-
bly (D).
4. Set puller Y089-000111 (E) on crankcase as-
sembly (D) as shown.
5. Tighten three nuts (F) on the puller (E) alternate-
ly to remove crankcase.
6. Remove another crankcase half in the same
ways.
NOTE : If puller Y089-000111 (E) is not available,
you can use puller Y089-000110 (G) prepared as
follows.
(1) Drill two 6mm dia holes on puller Y089-
000110 (G) as below.
(2) Three screws or bolts 91311-04075 (H) (size:
M4x75mm lengh,pitch 0.7mm)
(3) Three nuts 900500-00004 (F) (size : M4, pitch
0.7mm)
(4) Three circular washers 177214-03930 (J) (size
: innner dia.4.5 x outer dia.16.5 x 1.0mm thick-
ness)
7. Clean the inside of crankcase. Replace with new
one if damaged.
8. Measure crankshaft runout and replace if it
exceeds service limits (Refer to “1-5”). Inspect con-
necting rod big end (K) for discoloration or needle
bearing damage. Replace crankshaft assembly
with new one as required.
C
A
D
B
F
E
D
H
J
7mm
27mm
27mm
3mm
dia. 6mm
dia. 6mm
G
K