Mitsubishi S4Q User Manual page 163

MAINTENANCE STANDARDS
Group Inspection Point
Protrusion
Weight difference in one
engine
Diameter
Clearance between pin
and bore
Clearance between pin
and bushing
Inside diameter of
bushing
Bend and twist
Clearance between
crankpin and
connecting rod bearing
(oil clearance)
Thrust clearance of
connecting rod big-end
(End play)
Weight difference in one
engine
Flatness
Face runout
Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
Nominal
Value
87.970
Standard
[3.4634]
0.25 [0.0098] 88.220
oversize [3.4732]
0.50 [0.0197] 88.470
oversize [3.4831]
No. 1 ring
No. 2 ring
Oil ring
No. 1, No. 2
ring
O-ring
28
[1.10]
28
[1.10]
MAINTENANCE STANDARDS TABLE
Assembly
Standard Repair Limit
(Standard (Clearance)
Clearance)
87.955 to 87.985
[3.4628 to 3.4640]
88.205 to 88.235
[3.4726 to 3.4738]
88.455 to 88.485
[3.4825 to 3.4837]
0.13 to 0.60
[0.0051 to 0.0236]
5 g [0.2 oz] or less
(0.060 to 0.100)
([0.0024 to 0.0039])
(0.045 to 0.080)
([0.0018 to 0.0032])
(0.025 to 0.065)
([0.0010 to 0.0026])
(0.25 to 0.40)
([0.0098 to 0.0157])
(0.30 to 0.50)
([0.0118 to 0.0197])
27.994 to 28.000
[1.1021 to 1.1024]
0.000 to 0.016
[0.0000 to 0.0006]
(0.020 to 0.051)
([0.0008 to 0.0020])
28.020 to 28.045
[1.1031 to 1.1041]
0.05/100 [0.0020/ 0.15/100
3.94] or less [0.0059/3.94]
(0.03 to 0.09) (0.20)
([0.0012 to 0.0035]) ([0.0079])
(0.15 to 0.35)
([0.0059 to 0.0138])
10 g [0.35 oz] or
less
0.15 [0.0059] or
less
0.50
[0.0197]
0.15 [0.0059] or
less
ENGLISH
Service
Limit Remark
(Clearance)
87.770
[3.4555]
88.020
[3.4654]
88.270
[3.4752]
Check bearing clearance.
(0.200)
([0.0079])
Replace piston rings if
service limit is not
exceeded. Replace piston if
(0.150)
service limit is exceeded.
([0.0059])
(1.50)
([0.0591])
Replace pin if service limit is
0.050 nog exceeded. Replace
[0.0020] piston if service limit is
exceeded.
(0.080) Replace pin or bushing.
([0.0032]) Ream if necessary.
(0.50)
Replace connecting rod.
([0.020])
163 / 174