Komatsu 170-3 Series, Shop Manual, Page: 423 / 454

170-3 SERIES
15-17
REPAIR AND REPLACEMENT OF PARTS
TESTING AND INSPECTING
Unit: mm
Inspection item Judgement standards Remedy
A. Cracks
• Check for cracks (external color check)
• Cylinder head bolts hole portion, etc.
Replace
B. Correction of contact
at packing portion
Replace
C. Clearance between
liner and cylinder block
Replace cylinder
liner or block
D. Inside diameter of
camshaft bushing
• Inside diameter
• Clearance between camshaft bearing and cylinder block
Standard clearanceStandard valve
Replace bushing
E. Protrusion of liner
Replace cylinder
liner or correct
cylinder block
F. Depth of counter-bore
and corro-sion of bot-
tom surface
Repair by
machining, add
shim
Check for water leakage caused by corrosion
Standard
size
Standard valve
Standard
Clearance
Inside diame-
ter of block
Onside diam-
eter of liner
190.4 190.34 – 190.40 190.19 – 190.29 0.05 – 0.21
Standard size Standard valve Repair limit
105 105.017 – 105.101 105.130
Standard clearance Standard valve
0.059 – 0.173 0.24
Permissible range: 0.07 – 0.15
a: Cylinder block
b: Cylinder liner
• Check for corrosion
Standard size Standard value
14 14.00 – 14.05
(7)
TESTING AND INSPECTING CYLINDER BLOCK
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