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Mitsubishi MOTORS 4M41 User Manual

Mitsubishi MOTORS 4M41
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GENERAL INFORMATION 11B-0-3...................................................
1. SPECIFICATIONS 11B-1-1.......................................................
SERVICE SPECIFICATIONS 11B-1-1............................................
TORQUE SPECIFICATIONS 11B-1-4............................................
SEALANT 11B-1-8...........................................................
2. SPECIAL TOOLS 11B-2-1.......................................................
3. GENERATOR ASSEMBLY 11B-3-1...............................................
4. GLOW PLUG 11B-4-1...........................................................
5. COOLING FAN, V-BELT AND WATER PUMP 11B-5-1...............................
6. WATER HOSES AND PIPES 11B-6-1..............................................
7. THERMOSTAT 11B-7-1..........................................................
8. EGR VALVE ASSEMBLY 11B-8-1.................................................
9. INTAKE MANIFOLD 11B-9-1.....................................................
10. TURBOCHARGER ASSEMBLY 11B-10-1.........................................
11. EXHAUST MANIFOLD 11B-11-1..................................................
12. INJECTION PUMP ASSEMBLY 11B-12-1.........................................
13. INJECTION PUMP GEAR 11B-13-1..............................................
14. ROCKER COVER, CAMSHAFT HOLDER ASSEMBLY AND CAMSHAFT 11B-14-1....
15. INJECTION NOZZLE 11B-15-1..................................................
16. CYLINDER HEAD AND VALVE MECHANISM 11B-16-1.............................
17. VACUUM PUMP 11B-17-1......................................................
18. TIMING GEAR CASE 11B-18-1..................................................
19. TIMING GEAR AND BALANCE SHAFT 11B-19-1..................................
20. OIL PUMP 11B-20-1............................................................
21. OIL COOLER AND OIL FILTER 11B-21-1.........................................
22. OIL PAN, OIL STRAINER AND OIL JET 11B-22-1..................................
23. PISTON AND CONNECTING ROD 11B-23-1......................................
24. DRIVE PLATE 11B-24-1........................................................
25. CRANK SHAFT AND CRANK CASE 11B-25-1....................................
26. BALANCE SHAFT BUSH 11B-26-1..............................................
11B-0-1
ENGINE
4M41
CONTENTS
PWEE9409-D
E
Feb. 2000Mitsubishi Motors Corporation Added
ProCarManuals.com

Table of Contents

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Mitsubishi MOTORS 4M41 Specifications

General IconGeneral
Engine TypeDiesel
Fuel TypeDiesel
Cylinder arrangementInline-4
ValvetrainDOHC
Fuel SystemCommon rail direct injection
Bore x Stroke98.5 mm x 105 mm
Compression Ratio17.0:1
Displacement3.2 L
AspirationTurbocharged

Summary

Notes

General Information

Specifications

Glow Plug Service Specifications

Service specifications for the glow plug, including resistance value.

Intake Manifold Service Specifications

Service specifications for the intake manifold, including throttle body temperature.

Turbocharger Assembly Service Specifications

Service specifications for the turbocharger, including actuator operating pressure.

Camshaft and Rocker Specifications

Specifications for camshaft end play, lobe lift, bend, and rocker radial play.

Injection Nozzle Specifications

Specifications for injection nozzle, including opening pressure and pre-lift.

Cylinder Head and Valve Mechanism Specifications

Specifications for cylinder head and valve mechanism, including valve spring and distortion.

Valve Specifications

Specifications for intake and exhaust valves: stem diameter, sinkage, and seat angle.

Valve Guide and Seat Specifications

Specifications for valve guides and seats: clearance, width, and bottom surface distortion.

Vacuum Pump Performance Specifications

Specifications for vacuum pump degree of vacuum and pump speed.

Timing Gear and Balance Shaft Specifications

Specifications for timing gears and balance shafts: backlash, end play, and clearances.

Oil Pump Specifications

Specifications for oil pump clearances: shaft-to-case, side, and tip clearances.

Oil Cooler and Oil Filter Specifications

Specifications for oil cooler and oil filter components: valve opening pressures.

Piston and Connecting Rod Specifications

Specifications for piston and connecting rod: protrusion, clearances, end play, bend, and twist.

Crankshaft and Crankcase Specifications

Specifications for crankshaft and crankcase: end play, bend, out-of-roundness, conicity, and distortion.

Balance Shaft Bush Specifications

Specification for balance shaft bush clearance.

Torque Specifications

Glow Plug Torque Specifications

Torque values for glow plug connection plate and glow plug.

Cooling System Torque Specifications

Torque values for cooling fan, V-belt, and water pump components.

Water Hoses and Pipes Torque Specifications

Torque values for water hoses and pipes: eyebolt, coolant sensor.

Intake Manifold Torque Specifications

Torque values for intake manifold components: sensors, gas filter assembly.

Turbocharger Assembly Torque Specifications

Torque values for turbocharger assembly components: eyebolts, nuts, bolts.

Exhaust Manifold Torque Specifications

Torque value for exhaust manifold nut.

Injection Pump Assembly Torque Specifications

Torque values for injection pump assembly, pipes, and stays.

Rocker Cover and Camshaft Torque Specifications

Torque values for rocker cover, camshaft holder, and camshaft components.

Injection Nozzle Torque Specifications

Torque values for injection nozzle components: pipes, eyebolts, retaining nuts.

Cylinder Head and Valve Torque Specifications

Torque values for cylinder head and valve mechanism components: bolts, joints.

Vacuum Pump Torque Specifications

Torque values for vacuum pump components: eyebolts, cover bolts.

Timing Gear Case Torque Specifications

Torque values for timing gear case components: pulley bolts, cap nuts.

Timing Gear and Balance Shaft Torque Specifications

Torque values for timing gear and balance shaft components: bolts, nuts.

Oil Pump Torque Specifications

Torque values for oil pump components: balance shaft bolts, cover screws.

Oil Cooler and Oil Filter Torque Specifications

Torque values for oil cooler and oil filter components: element nuts, plugs.

Oil Pan, Strainer, Jet Torque Specifications

Torque values for oil pan, oil jet, and drain plug.

Piston and Connecting Rod Torque Specifications

Torque value for connecting rod cap mounting nut.

Drive Plate Torque Specifications

Torque values for drive plate assembly mounting bolts.

Crankshaft and Crankcase Torque Specifications

Torque values for crankshaft and crankcase components: dust cover, main bearing bolts.

Standard Bolt and Nut Tightening Torque Table

Torque values for hexagon head bolts and stud bolts by strength code and diameter.

Hexagon Flange Bolts Torque Specifications

Torque values for hexagon flange bolts by strength code, head mark, and diameter.

Hexagon Nuts Torque Specifications

Torque values for hexagon nuts by strength code, head mark, diameter, and thread type.

Hexagon Flange Nuts Torque Specifications

Torque values for hexagon flange nuts by strength code, head mark, diameter, and thread type.

Sealant

Sealant Specifications by Location

Specified sealants for various engine mating surfaces.

Form-In-Place Gasket (FIPG) Application Procedures

Precautions and procedures for applying FIPG: bead size, continuity, location.

Special Tools

Special Tools for Crankshaft Pulley & Injection Pump

Tools for crankshaft pulley removal/installation and injection pump assembly.

Special Tools for Retaining Nut & Nozzle Cleaning

Tools for retaining nut removal/installation and nozzle cleaning.

Special Tools for Injection Nozzle Adjustment

Tools for injection nozzle opening pressure adjustment and lift checking.

Special Tools for Cam Sprocket & Valve Springs

Tools for holding camshaft sprocket and for valve spring compression/removal.

Special Tools for Valve Guide & Seat Work

Tools for valve guide removal/installation and valve seat installation.

Special Tools for Valve Stem Seal, Bushing & Piston Rings

Tools for valve stem seal, idler gear bush, idler sprocket bush, and piston rings.

Special Tools for Bushing Removal/Installation & Gears

Tools for connecting rod bush, piston guide, gear puller, and balance shaft bush.

Special Tools for Injection Pump Gear

Tools for injection pump gear removal and assembly.

Generator Assembly

Generator Assembly Removal and Installation

Steps and diagram for removing and installing the generator assembly.

Generator Inspection and Handling Cautions

Inspection points for the generator and cautions for handling to prevent damage.

Glow Plug

Glow Plug Removal and Installation

Diagram and steps for removing and installing glow plugs.

Glow Plug Inspection

Procedure for inspecting glow plug resistance and replacement criteria.

Cooling Fan, V-belt, and Water Pump

Cooling Fan, V-belt, Water Pump Removal/Installation

Diagram and steps for removing and installing cooling fan, V-belt, and water pump.

Water Hoses and Pipes

Water Hoses and Pipes Removal and Installation

Diagram and steps for removing and installing water hoses and pipes.

O-Ring Installation Caution

Caution regarding O-ring installation and avoiding engine oil contact.

Thermostat

Thermostat Removal and Installation

Diagram and steps for removing and installing the thermostat and related components.

O-Ring Installation Caution

Caution regarding O-ring installation, emphasizing avoiding engine oil.

Thermostat Installation Procedure

Procedure for installing the thermostat with its jiggle valve in the uppermost position.

EGR Valve Assembly

EGR Valve Assembly Removal/Installation (Except 2002 Pajero)

Diagram and steps for EGR valve assembly removal/installation for specific models.

EGR Valve Assembly Removal/Installation (2002 Pajero)

Diagram and steps for EGR valve assembly removal/installation for 2002 Pajero models.

EGR Valve and Cooler Cleaning Procedures

Procedures for cleaning carbon deposits from EGR valve and cooler, with cautions.

EGR Cooler Inspection for Leaks

Methods for inspecting EGR cooler for air leaks in exhaust and coolant passages.

Intake Manifold

Intake Manifold Removal/Installation (Except 2002 Pajero)

Diagram and steps for intake manifold removal/installation for specific models.

Intake Manifold Removal/Installation (2002 Pajero)

Diagram and steps for intake manifold removal/installation for 2002 Pajero models.

Intake Manifold Gasket Installation

Procedure for fitting the gasket to the cylinder head for intake manifold installation.

Throttle Body Assembly Inspection

Inspection of throttle valve movement, damage, and resistance measurements.

Turbocharger Assembly

Turbocharger Assembly Removal and Installation

Diagram and steps for removing and installing the turbocharger assembly.

Turbocharger Assembly Installation Procedures

Lubricating turbocharger parts and checking actuator pressure.

Exhaust Manifold

Exhaust Manifold Removal and Installation

Diagram and steps for removing and installing the exhaust manifold.

Injection Pump Assembly

Injection Pump Assembly Removal and Installation

Diagram and steps for removing and installing the injection pump assembly.

Fuel Injection Pipe Removal Procedure

Procedure for removing fuel injection pipe while locking delivery valve holder.

Injection Pump Assembly Installation Steps

Steps for installing injection pump assembly, including timing and gear alignment.

Injection Pump Gear Meshing and Installation

Confirming gear alignment and positioning injection pump assembly.

Fuel Injection Pipe Installation Procedure

Procedure for tightening fuel injection pipe union nut.

Injection Pump Gear

Injection Pump Gear Removal and Installation

Diagram and steps for removing and installing injection pump gear and related components.

Injection Pump Gear Removal Procedure

Using a special tool to remove the injection pump gear.

Flange Plate Installation Procedure

Installing flange plate while aligning mating marks.

Injection Pump Gear Assembly Installation Steps

Clamping gear, removing locating pin, and installing sub gears and springs.

Injection Pump Gear Snap Ring and Sub Gear Installation

Fitting snap ring, aligning sub gear, and installing bolt and locating pin.

Rocker Cover, Camshaft Holder, and Camshaft

Rocker Cover, Camshaft Holder, Camshaft Removal/Installation

Diagram for removal and installation of rocker cover, camshaft holder, and camshaft.

Camshaft End Play Inspection and Correction

Measuring camshaft end play and replacing defective parts if limit is exceeded.

Bolt Removal Cautions and Procedures

Cautions for removing inversely threaded bolt and meshing camshaft sprockets.

Bolt Installation Cautions

Cautions regarding inversely threaded bolt installation direction.

Rocker Cover Gasket and Assembly Installation

Installing rocker cover gasket and assembly, with cautions.

Camshaft Lobe Lift Inspection

Measuring camshaft lobe lift and replacing if limit is exceeded.

Camshaft Bend Inspection

Measuring camshaft bend and replacing if limit is exceeded.

Camshaft Journal Oil Clearance Inspection

Measuring oil clearance at camshaft journals and replacing defective parts.

Rocker Radial Play Inspection

Measuring radial play at the rocker roller and replacing defective parts.

Injection Nozzle

Injection Nozzle Removal and Installation

Diagram and steps for removing and installing the injection nozzle assembly.

Injection Nozzle Pre-Removal Cautions

Cautions on fuel flammability, cleaning, and component combinations for injection nozzles.

Valve Opening Pressure Check Procedure

Procedure for checking injection nozzle valve opening pressure using a tester.

Injection Nozzle Spray Pattern Check

Procedure for checking injection nozzle spray patterns and identifying good/bad types.

Injection Nozzle Oil Tightness Check

Checking injection nozzle for dribbling after pressure increase.

Retaining Nut Removal and Installation Procedures

Using a special tool to remove and install the retaining nut for the injection nozzle.

Nozzle Tip and Needle Valve Cleaning Procedures

Procedures for cleaning nozzle tip and needle valve using special tools and cautions.

Nozzle Tip and Needle Valve Inspection

Inspection of needle valve sliding and replacement criteria.

Injection Nozzle Assembly Adjustment Sequence

Sequence for adjusting and checking injection nozzle assembly parts.

Adjusting 1st Valve Opening Pressure Steps

Steps for fitting parts, lift piece, nozzle tip, and securing with retaining nut.

1st Valve Opening Pressure Measurement Procedure

Attaching nozzle holder to tester and measuring 1st valve opening pressure.

Needle Valve Full Lift Check Procedure

Checking needle valve full lift using special tools like plate, holder, and nut.

Dial Gauge Measurement for Needle Valve Full Lift

Connecting dial gauge and measuring needle valve lift at specific pressure.

Prelift Check Procedure Steps

Attaching nozzle holder to tester, zeroing dial gauge, and bleeding air.

Prelift Measurement and Adjustment Procedures

Reading dial gauge for prelift and replacing parts if readings deviate from standard.

Adjusting 2nd Valve Opening Pressure Procedure

Operating tester to increase pressure and checking for needle valve lift.

2nd Valve Opening Pressure Adjustment Steps

Adjusting pressure by changing shims if dial gauge readings deviate from standard.

Injection Nozzle Assembly Final Check

Removing special tools and performing final check of 1st valve opening pressure, spray form, and seat tightness.

Cylinder Head and Valve Mechanism

Cylinder Head and Valve Mechanism Removal/Installation

Diagram and steps for removing and installing cylinder head and valve components.

Valve Cotter Removal Procedures

Caution regarding cylinder head bolts and timing chain removal. Method 1 for valve cotter removal.

Valve Spring and Seat Installation Procedures

Installing valve spring and valve stem seal.

Valve Guide Removal and Installation Procedures

Procedures for removing and installing exhaust and intake valve guides.

Valve Seat Removal and Installation Procedures

Procedures for removing and installing exhaust and intake valve seats.

Cylinder Head Assembly and Gasket Removal Procedures

Caution for gasket removal and stepwise loosening of cylinder head bolts.

Camshaft Sprocket Holder Kit Usage Instructions

Using a special tool to hold camshaft sprockets while removing cylinder head assembly.

Valve Cotter Removal Methods

Using special tools MD998772 and MD998784 to remove valve cotters.

Valve Cotter Removal Method 2

Using special tool MD999597 to compress valve spring for cotter removal.

Valve Cotter Installation Method 1

Using special tools to install valve cotters by depressing the valve spring retainer.

Valve Guide Removal Procedure

Removing valve guides using a special tool.

Valve Seat Removal Procedure

Removing shrink-fitted valve seats by grinding and pulling.

Intake and Exhaust Valve Seat Installation Procedures

Measuring seat hole diameter, selecting oversize seats, and pressing them in.

Intake and Exhaust Valve Guide Installation Procedures

Measuring guide hole diameter, selecting oversize guides, and installing them.

Valve Stem Seal Installation Procedure

Applying oil to seal lip and pressing it into position with a special tool.

Valve Spring Installation Procedure

Installing the valve spring with the blue painted end facing upward.

Valve Cotter Installation Method 1

Using special tools to install valve cotters by depressing the spring retainer.

Valve Cotter Installation Method 1 Continued

Securing retainer holder, adjusting stay position, and installing valve cotters.

Valve Cotter Installation Method 2

Using special tool to compress valve spring for installing valve cotters.

Cylinder Head Gasket Selection and Installation

Selecting and installing cylinder head gasket based on piston protrusion and crankcase marks.

Cylinder Head Assembly Installation Cautions

Cautions on punch marks for cylinder head bolts and ensuring proper fit.

Cylinder Head Gasket Installation Sealant Application

Applying specified sealant to front plate for cylinder head gasket installation.

Cylinder Head Bolt Tightening Sequence and Torque

Detailed procedure for tightening cylinder head bolts in stages and sequences.

Gasket and Tensioner Installation Procedure

Fitting the gasket and tensioner for the cylinder head assembly.

Tensioner Installation and Operation Cautions

Installing tensioner, cranking engine, and cautions for chain damage.

Valve Stem Wear Inspection Procedure

Checking valve stem diameter for wear and replacing if below specified limit.

Valve Seat Angle and Margin Inspection

Checking valve seat angle and margin, and replacing if limit is exceeded.

Valve Seat Width and Sinkage Inspection

Checking valve seat width and sinkage, and caution for proper seating after correction.

Valve and Valve Guide Clearance Inspection

Checking clearance between valve and valve guide and replacing if limit is exceeded.

Valve and Valve Seat Contact Check Procedure

Checking valve seating condition using minium pattern and determining corrective action.

Cylinder Head Assembly Distortion Check

Measuring cylinder head bottom surface distortion and replacing if limit is exceeded.

Valve and Seat Correction Procedures

Grinding valve margin, seat width, and lapping for proper seating.

Valve Lapping Procedure Steps

Applying lapping compound, striking valve, washing, and checking seat contact.

Valve Lapping and Seat Replacement Procedure

Performing valve lapping with a valve lapper and replacing valve seat if necessary.

Vacuum Pump

Vacuum Pump Removal and Installation

Diagram and steps for removing and installing the vacuum pump assembly.

Vacuum Pump Assembly Inspection Procedure

Connecting vacuum tank and gauge, and checking vacuum degree and pump speed.

Timing Gear Case

Timing Gear Case Removal and Installation

Diagram and steps for removing and installing the timing gear case and related parts.

Crankshaft Pulley Removal Procedure

Removing crankshaft pulley using a special tool.

Timing Gear Case Installation Procedure

Applying sealant to timing gear case joint surface and installing it.

Front Oil Seal Installation Procedure

Applying oil to seal lip and pressing it into the timing gear case.

Timing Gear and Balance Shaft

Timing Gear and Balance Shaft Removal/Installation

Diagram showing components for timing gear and balance shaft removal and installation.

Gear Backlash Inspection Procedure

Measuring backlash between gears and replacing defective parts if limit is exceeded.

End Play Inspection Procedure

Measuring end play of balance shafts and idler gears, and replacing if limit is exceeded.

Idler Gear Bush Removal Procedure

Using a special tool to remove the idler gear bush.

Idler Sprocket Bush Removal Procedure

Using a special tool to remove the idler sprocket bush.

Idler Sprocket Bush Installation Procedure

Press-fitting idler sprocket bush into idler gear using a special tool.

Idler Gear and Sprocket Assembly Installation

Installing idler gear and sprocket assembly onto idler shaft, aligning marks.

Balance Shaft LH Assembly Installation Procedure

Assembling and installing balance shaft LH assembly, with cautions for O-ring and bush.

Idler Gear Bush LH Installation Procedure

Press-fitting idler gear bush LH into idler gear using a special tool.

Idler Gear LH Assembly Installation Procedure

Installing idler gear LH assembly onto idler shaft, aligning marks.

Balance Shaft RH Assembly Installation Procedure

Assembling and installing balance shaft RH assembly, aligning marks on gears.

Timing Chain Installation Procedure

Holding camshaft sprocket, aligning marks, and installing timing chain with specific link plates.

Timing Chain Inspection Procedure

Aligning stamped lines, checking chain slack, and replacing timing chain if limit is exceeded.

Tension Lever and Shaft Inspection

Inspecting tensioner lever for cracks and checking tension lever shaft clearance.

Guide Plate Inspection Procedure

Replacing guide plate if it shows cracks or flakes.

Idler Gear Bush and Shaft Clearance Inspection

Checking clearance between idler gear bush and shaft, and replacing if limit is exceeded.

Idler Sprocket Bush and Shaft Clearance Inspection

Checking clearance between idler sprocket bush and shaft, and replacing if limit is exceeded.

Oil Pump

Oil Pump Removal and Installation

Diagram and steps for removing and installing the oil pump assembly and its components.

Oil Pump Clearances Inspection

Inspecting shaft-to-case, gear height-to-case, and gear tooth crest-to-case clearances.

Oil Cooler and Oil Filter

Oil Cooler and Oil Filter Removal/Installation

Diagram and steps for removing and installing the oil filter and oil cooler assembly.

Oil Cooler Element Cleaning and Inspection

Cleaning and inspecting the oil cooler element for carbon deposits and air leaks.

Oil Filter Installation Procedure

Cleaning the oil cooler assembly surface and applying oil to the filter gasket.

Oil Pan, Oil Strainer, and Oil Jet

Oil Pan, Oil Strainer, Oil Jet Removal/Installation

Diagram and steps for removing and installing the oil pan, oil strainer, and oil jet.

Oil Pan Installation Procedure

Applying sealant to crankcase and timing gear case, then installing oil pan with specified bead.

Piston and Connecting Rod

Piston and Connecting Rod Removal/Installation

Diagram showing components for piston and connecting rod removal and installation.

Connecting Rod Bolt and Nut Tightening Cautions

Cautions on connecting rod bolt removal and tightening, and piston ring removal.

Piston Ring Removal Procedure

Using a special tool to remove each piston ring.

Piston Protrusion Inspection Procedure

Checking piston protrusions from crankcase top and selecting gasket thickness.

Connecting Rod End Play Inspection

Measuring connecting rod end play and replacing defective parts if limit is exceeded.

Nut Removal Cautions

Cautions regarding punch marks on connecting rod nuts and bolts.

Piston Pin and Connecting Rod Assembly Removal Procedure

Removing piston pin using a push-out bar, with notes on warming the piston.

Connecting Rod Bush Removal Procedure

Using a special tool to remove the connecting rod bush.

Connecting Rod Bolt Installation Procedure

Checking bolt hole, applying oil, and fitting connecting rod bolt with a press ram load.

Connecting Rod Bush Installation Procedure

Using special tool to install connecting rod bush, applying oil, and reaming for clearance.

Piston, Piston Pin, Connecting Rod Assembly Installation

Using pistons with matching size marks and cautions about size mismatches.

Piston Pin and Connecting Rod Installation Procedure

Installing piston pin, connecting rod, and piston, and checking for smooth movement.

Piston Ring Installation Procedure

Installing oil rings and compression rings with correct end gap positioning.

Piston and Connecting Rod Assembly Installation Steps

Checking piston ring gaps, size marks, and using vinyl hose for protection during assembly.

Piston and Connecting Rod Assembly Installation Steps

Installing piston/rod assembly, applying oil, tightening connecting rod cap nuts in stages.

Connecting Rod Bearing Selection and Installation

Methods for selecting and installing connecting rod bearings based on measurements and identification colors.

Connecting Rod Bearing Inspection Procedures

Cautions on bearing installation, checking free span, and replacing them as a set.

Connecting Rod Bearing-to-Crankshaft Clearance

Measuring clearance and adjusting crankshaft O.D. if undersize bearings are used.

Piston Ring End Gap Inspection Procedure

Measuring piston ring end gap and replacing rings if limit is exceeded.

Piston Ring-to-Groove Clearance Inspection

Measuring clearance between piston rings and grooves, and cautions for replacement.

Piston Pin Clearance Inspection Procedure

Measuring clearance between piston pin and piston, and piston pin and connecting rod bush.

Connecting Rod Bend and Twist Measurement Procedure

Measuring bend and twist of connecting rod using an aligner and replacing if limit is exceeded.

Drive Plate

Drive Plate Removal and Installation

Diagram and steps for removing and installing the drive plate assembly.

Ring Gear Removal Procedure

Heating the ring gear evenly and tapping it to remove.

Crankshaft Adaptor and Adaptor Plate Installation

Attaching adaptor plate and crankshaft adaptor to drive plate assembly.

Ring Gear Installation Procedure

Heating the ring gear and fitting it onto the drive plate.

Ring Gear Inspection Procedure

Checking the ring gear for damage and abnormal wear.

Crankshaft and Crank Case

Crankshaft and Crank Case Removal/Installation

Diagram showing components for crankshaft and crank case removal and installation.

Crankshaft End Play Inspection Procedure

Measuring crankshaft end play and replacing thrust plates if limit is exceeded.

Lower Crankcase Assembly Removal Procedure

Gradually loosening bolts in sequence for lower crankcase removal.

Crankshaft Gear Removal Procedure

Removing crankshaft gear using a special tool with protection cautions.

Main Bearing Installation Procedure

Matching bearing plate thickness to crankcase and crankshaft O.D., and selecting bearings.

Thrust Plate Installation Procedure

Installing thrust plates with oil groove outward, and using oversize plates correctly.

Crankshaft Gear Installation Procedure

Heating crankshaft gear and installing it onto crankshaft, aligning key.

Lower Crankcase Assembly Installation Procedure

Applying sealant, tightening main cap bolts in sequence, and checking rotation and end play.

Rear Oil Seal and Case Installation Procedure

Applying oil to seal lip and sealant to case for proper installation.

Front Plate Installation Procedure

Applying sealant to crankcase and installing front plate with temporary bolt.

Main Bearing Inspection Procedures

Cautions on bearing installation, checking free span, and measuring bearing-to-crankshaft clearance.

Crankshaft Journal and Pin Inspection Procedures

Checking crankshaft journal and pin for out-of-roundness and conicity, and replacing if limit is exceeded.

Crankshaft Bend Measurement Procedure

Measuring crankshaft bend using journals and replacing if limit is exceeded.

Upper Crankcase Distortion and Cylinder Diameter Check

Checking upper crankcase distortion and cylinder inside diameter, and machining if necessary.

Cylinder Boring Procedure

Determining oversize pistons, calculating boring dimensions, and honing cylinders.

Balance Shaft Bush

Balance Shaft Bush Removal Procedure

Using a special tool to remove the balance shaft bush, with cautions for applying oil.

Balance Shaft Bush Installation Procedure

Using a special tool to install balance shaft bushes, applying oil to sliding surfaces.

Balance Shaft Bush Installation Alignment Procedures

Aligning oil holes and installer marks for correct bush installation.

Balance Shaft Bush Installation Final Steps

Predetermining press-fitting depth and checking oil hole alignment.

Balance Shaft Bush Clearance Inspection

Measuring clearance between balance shaft bush and shaft, and replacing if limit is exceeded.

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