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Mitsubishi S12A2 User Manual

Mitsubishi S12A2
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2-14
Chapter 2 SERVICE DATA
1.5 Maintenance Service Data of Cooling System
Unit: mm [in.]
Item
Nominal
value
Standard value
Limit
value
Remarks
Tension
pulley
Water
pump
P/N:32645-92020
Inside diameter of pulley
bearing fit
ø80 [3.15]
79.961 to 79.991
[3.1481 to 3.1492]
Bearing
Outside
diameter
ø80 [3.15]
79.987 to 80.000
[3.1491 to 3.1496]
Inside
diameter
ø35 [1.38]
34.988 to 35.000
[1.3775 to 1.3780]
Bracket bearing
Outside diameter to fit
ø35 [1.38]
34.984 to 35.000
[1.3773 to 1.3780]
P/N:32653-05010
Pulley bearing
inside diameter of counter-
bore
ø52 [2.05]
51.970 to 51.995
[2.0461 to 2.0470]
Bearing
Outside
diameter
ø52 [2.05]
51.987 to 52.000
[2.0467 to 2.0472]
Inside
diameter
ø20 [0.79]
19.988 to 20.000
[0.7869 to 0.7874]
Outside diameter of bracket
bearing fit
ø20 [0.79]
19.987 to 20.000
[0.7869 to 0.7874]
P/N:32645-18401
Inside diameter of pulley
bearing fit
ø90 [3.54]
89.972 to 89.994
[3.5422 to 3.5431]
Bearing
Outside
diameter
ø90 [3.54]
89.985 to 90.000
[3.5427 to 3.5433]
Inside
diameter
ø40 [1.57]
39.988 to 40.000
[1.5743 to 1.5748]
Bracket bearing
Outside diameter to fit
ø40 [1.57]
39.984 to 40.000
[1.5742 to 1.5748]
Fan
Inside diameter of pulley
bearing fit
ø120
[4.72]
119.972 to 119.994
[4.7233 to 4.7242]
Bearing
Outside
diameter
ø120
[4.72]
119.985 to 120.000
[4.7238 to 4.7244]
Inside
diameter
ø45 [1.77]
44.988 to 45.000
[1.7712 to 1.7717]
Outside diameter of bracket
bearing fit
ø45 [1.77]
44.984 to 45.000
[1.7710 to 1.7717]
Thermo-
stat
Valve opening temperature
Primary
69 to 73°C
[156 to 163°F]
Valve opening tempera-
ture stamp: 71°C
[160°F]
Second-
ary
72 to 76°C
[162 to 169°F]
Temperature at which valve lift becomes 10 [0.433] or more 85°C [185°F]

Table of Contents

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Mitsubishi S12A2 Specifications

General IconGeneral
BrandMitsubishi
ModelS12A2
CategoryEngine
LanguageEnglish

Summary

FOREWORD

General Safety Precautions

Covers critical safety guidelines for preventing hazards, including fire, injury from moving parts, and handling hazardous materials.

SERVICE DATA

Maintenance Service Data

Provides standard and limit values for engine general, basic engine, and system-specific maintenance parameters.

Tightening Torque Specifications

Lists specified tightening torques for various engine components and systems for proper assembly and safety.

OVERHAUL INSTRUCTIONS

DISASSEMBLY OF BASIC ENGINE

Cylinder Liner, Piston, and Connecting Rod Disassembly

Comprehensive guide for disassembling and inspecting cylinder liners, pistons, connecting rods, and related parts.

Crankcase, Crankshaft, and Main Bearing Disassembly

Steps for disassembling and inspecting the engine's crankcase, crankshaft, and main bearing components.

INSPECTION AND REPAIR OF BASIC ENGINE

Piston and Connecting Rod Inspection and Repair

Detailed inspection and repair procedures for pistons, piston rings, connecting rods, and their bearings.

Crankcase and Crankshaft Inspection and Repair

Procedures for inspecting and repairing crankcase surfaces, crankshaft journals, pins, and bearings for wear and damage.

ASSEMBLY OF BASIC ENGINE

Crankshaft and Main Bearing Installation

Instructions for installing the crankshaft, main bearings, thrust plates, and ensuring proper end play.

Cylinder Liner, Piston, and Connecting Rod Assembly

Steps for assembling cylinder liners, pistons, connecting rods, rings, and checking their clearances.

FUEL SYSTEM

Fuel System Disassembly, Inspection, and Assembly

Detailed steps for disassembling, inspecting, and reassembling fuel filters, injection nozzles, and pumps.

LUBRICATION SYSTEM

Lubrication System Disassembly, Inspection, and Assembly

Detailed steps for disassembling, inspecting, and reassembling oil strainers, oil pumps, safety valves, and oil coolers.

COOLING SYSTEM

Cooling System Disassembly, Inspection, and Assembly

Detailed steps for disassembling, inspecting, and reassembling tension pulleys, thermostats, water pumps, and heat exchangers.

INLET AND EXHAUST SYSTEMS

Inlet and Exhaust Systems Disassembly, Inspection, and Assembly

Detailed steps for disassembling, inspecting, and reassembling air coolers and pre-cleaners.

AIR START SYSTEM

ADJUSTMENT AND OPERATION

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