Mitsubishi FUSO FH 1997, Service Manual

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11-42
12170
●
Disassembly sequence
1 Snap ring
2 Piston pin
3 Connecting rod bushing
4 Connecting rod
5 1st compression ring
6 2nd compression ring
7 Oil ring
8 Piston
●
Assembly sequence
Follow the disassembly sequence in re-
verse.
Service standards
Unit : mm {in.}
Standard value
Location Maintenance item Limit Remedy
(Basic diameter in [ ])
2, 3
Clearance between piston pin and [36] 0.03 to 0.04 0.1 {0.0039} Replace
connecting rod bushing {[1.42] 0.0012 to 0.0016}
2, 8
Clearance between piston and piston pin [36] 0.007 to 0.021 0.05 {0.0020} Replace
{[1.42] 0.00028 to 0.00083}
4
Degree of bend and distortion of connecting rod — 0.05 {0.0020} Repair or
replace
5 to 7
Deviation of piston ring 1st compression ring 0.3 to 0.45 {0.012 to 0.018} 1.5 {0.059} Replace
fitted position
2nd compression ring 0.4 to 0.55 {0.016 to 0.022}
Oil ring 0.25 to 0.45 {0.0098 to 0.018}
5 to 8
Clearance between piston 1st compression ring 0.02 to 0.10 {0.00079 to 0.0039} 0.2 {0.0079} Replace
ring and piston ring groove
2nd compression ring 0.05 to 0.08 {0.0020 to 0.0031} 0.15 {0.0059}
Oil ring 0.03 to 0.06 {0.0012 to 0.0024}
PISTON, CONNECTING ROD AND CYLINDER SLEEVE
Piston and Connecting Rod Assembly
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Lubricant
Location Points of application Kinds Quantity
2
Exterior of piston pin Engine oil As required
3
Exterior of connecting rod bushing Engine oil As required
4
Bushing attachment area of connecting rod Engine oil As required
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1
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-