INSPECTION AND REPAIR OF BASIC ENGINE
6-17
4.2 Measuring cylinder inside diameter
(1)
Measure the inside diameter of the cylinder at three
levels, i.e., upper (with much stepped wear), middle,
and lower levels, in both directions parallel to and
perpendicular to the crankshaft direction.
(2)
If the measurement is between the repair limit and
replacement limit, re-bore the cylinder to +0.25 mm
[0.0098 in.] or +0.5 mm [0.0197 in.] oversize. Hone the
re-bored cylinder to the accuracy of the standard.
(3)
Use an oversize piston and piston rings to fit the re-
bored cylinder.
(4)
If the cylinder is worn unevenly, select an oversize
diameter that ensures complete roundness when the
cylinder is re-bored to the maximum. All cylinders
must be re-bored to the same oversize diameter if one
cylinder is re-bored.
(5)
If the cylinder has a slight wear and is reused after
replacing only the piston rings, remove the steps in
worn portion in the upper part of the cylinder using a
ridge reamer. Hone it as necessary.
Measuring cylinder sleeve inside diameter
Refacing using a ridge reamer
Item
Standard
Limit
Cylinder
inside diameter
94.000 to 94.035 mm
[3.7008 to 3.7022 in.]
Repair limit:
94.200 mm [3.7087 in.]
Replace limit:
94.700 mm [3.7283 in.]
Circularity
0.01 mm
[0.0004 in.] or less
-
Cylindricity
0.015 mm
[0.0006 in.] or less
-
1
1
[0.43]
80 [3.15]
150 [5.91]
Measuring
directions
Measuring
points
Unit: mm [in.]
https://www.forkliftpdfmanuals.com/
Summary of Contents for HDF 50-7S
Page 2: ...https www forkliftpdfmanuals com ...
Page 282: ...7 3 2 HDF50 70 7 https www forkliftpdfmanuals com ...
Page 283: ...7 3 MEMORANDUM https www forkliftpdfmanuals com ...
Page 316: ...https www forkliftpdfmanuals com ...
Page 318: ...https www forkliftpdfmanuals com ...
Page 330: ...https www forkliftpdfmanuals com ...
Page 353: ...3 1 SERVICE TOOLS 1 Special tool 3 2 https www forkliftpdfmanuals com ...
Page 360: ...https www forkliftpdfmanuals com ...
Page 378: ...https www forkliftpdfmanuals com ...
Page 408: ...https www forkliftpdfmanuals com ...
Page 428: ...https www forkliftpdfmanuals com ...
Page 506: ...ELECTRICAL SYSTEM 12 28 Installing alternator S6S Y3T62HF https www forkliftpdfmanuals com ...
Page 508: ...https www forkliftpdfmanuals com ...