Komatsu 170-3 Series, Руководство по ремонту, Страница: 451 / 454

170-3 SERIES
15-45
REPAIR AND REPLACEMENT OF PARTS
Unit: mm
Inspection item Judgement standards Remedy
F. Scratches on inside
surface of bearing, sei-
zure Check for scratches or seizure
Replace, replace
connecting rod
also
G. Distance between
holes at big end and
small end Replace
H. Scratches at I shape
prttion of connecting
rod (dents)
Replace
Replace if there
are any dents,
regardless of
size
I. Fretting of mating sur-
face of cap
Check for fretting of mating surface
Roughness of mating surface: Max. 6.3 S
Contact of mating sutface: Min. 70%
Replace if
fingernail
catches in
fretting
J. Scuffing of bolt seat
surface
Scuffing of cap bolt seat surface
Correct with oil-
stone
Scuffing of bolt seat surface Replace bolt
Scuffing of washer surface Replace washer
K. Deformation of dowel
pin
Check for deformation of dowel pin
Check for deformation of dowel pin hole
Replace
L. Damage to bolt
Check for cracks, damage to bolt thread
Check for curvature of bolt
Replace bolt
Standard size Tolerance
305
0
-0.05
• Check for scratches c in horizontal
direction in area A
d: Direction of length
• Check for grinder grain in horizontal
direction in area A
(7)
TESTING AND INSPECTING CONNECTING ROD
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