engineering dictionary

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CLUTCH PLATE AND DISC

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS AND DIAGNOSIS FOR REUSAGE . . . . . . . . 2
• Check points of parts for reusability
• Standards for failure determination
• Measuring methods
FAILURE ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
• Failure causes
TYPICAL EXAMPLES OF FAILURES . . . . . . . . . . . . . . . . . . . 22
• Disc failures
• Plate failures
PROCEDURES FOR RECONDITIONING DISCS
AND PLATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
• Discs
• Plates
CONSTRUCTION AND FUNCTION OF CLUTCHES. . . . . . . . 33
• Construction of clutches and their classification by applications
• Discs
• Plates
• Materials and applicable heat treatments of discs and plates
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 41

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BEARING

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
REPRESENTATIVE BEARING FAILURES . . . . . . . . . . . . . . . . 2
FAILURE SIGNS AND DIAGNOSIS
FOR REUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• Outer race
• Inner race
• Balls (or rollers) and cage
FAILURES AND THEIR CAUSES . . . . . . . . . . . . . . . . . . . . . . 28
• Failure times and their causes
• Erroneous bearing selection
• Improper handling and installation of bearings
• Parts failures other than bearings
• Failures due to lubricant
• Faulty sealing units
BEARING BASICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
• Types of bearings
• Nomenclature
• Bearing characteristics
• Bearing lubrication
• Bearing service life
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 36

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FLOATING SEAL

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS AND DIAGNOSIS FOR REUSE . . . . . . . . . . . 2
• Inspection points for parts reusage diagnosis
• Standards for turning a sealed & lubricated track
• Standards for reusage of track parts
• Failure signs and diagnosis for reuse
• Seals, bushings, spacers, links and pins
EXAMPLES OF FAILURE ANALYSES
OF SEALED & LUBRICATED TRACK . . . . . . . . . . . . . . . . . . 28
CONSTRUCTION AND FUNCTION . . . . . . . . . . . . . . . . . . . . . 31
• General
• Structure of sealed & lubricated track
• Functions of sealed & lubricated track parts
• Materials and heat treatment
TECHNICAL POINTS REQUIRED
FOR A "WET TURN" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
• Functional requirements for lubrication of
pins, bushings, etc.
• Precautions for the sealing mechanism
• Precautions for the track link movement while
traveling (crawling)
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 41

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LUBRICATED TRACKS

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS AND DIAGNOSIS FOR REUSE . . . . . . . . . . . 2
• Inspection points for parts reuse diagnosis
• Standards for reuse of track parts
• Failure signs and diagnosis for reuse
• Seals, bushings, spacers, links and pins
EXAMPLES OF FAILURE ANALYSES
OF SEALED & LUBRICATED TRACK . . . . . . . . . . . . . . . . . . 25
CONSTRUCTION AND FUNCTION . . . . . . . . . . . . . . . . . . . . . 28
• Structure of the sealed & lubricated track
• Materials and heat treatment
• Progress of wear and rebuilding of track
TECHNICAL POINTS REQUIRED
FOR AN "OIL TURN" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
• Functional requirements for lubrication of
pins, bushings, etc.
• Precautions for the sealing mechanism
• Precautions for the track link movement during travel
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 43

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Oil Management

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့HYDRAULIC ေရာ္ဘာ ပိုက္မ်ားအေၾကာင္း

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS AND DIAGNOSIS FOR REUSE . . . . . . . . . . . 2
• Inspection Points for Parts Reuse Diagnosis
• Standards for Failure Determination
• Standards for Reuse of Hydraulic Hose Parts
EXAMPLES OF FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
• Adapter Seals
• Adapter-Hose Interface
• Hoses
STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . 31
• Functions
• Hose Structure
• Adapter Structure
• Hose Brands
• Hose Parts Number
FAILURES AND THEIR CAUSES . . . . . . . . . . . . . . . . . . . . . . 34
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 35
• Maintenance
• Precautions when Storing Hoses
• Precautions when Installing Hoses
• Physical Effects of Long-Term Storage

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CYLINDER LINERS, PISTONS AND PISTON RINGS

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS, THEIR CAUSES AND DIAGNOSIS
FOR REUSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• Inspection points for parts reusage diagnosis
• Standards for failure determination
TYPICAL EXAMPLES OF FAILURES . . . . . . . . . . . . . . . . . . . 40
• Cylinder head failures
• Piston failures
• Piston ring failures
FAILURES AND THEIR CAUSES . . . . . . . . . . . . . . . . . . . . . . 46
• Lubricating oil
• Cooling water
• Air intake (dust)
• Machine operation
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 47
CONSTRUCTION AND FUNCTION . . . . . . . . . . . . . . . . . . . . . 49
• Cylinder liners
• Pistons
• Piston rings
BASIC MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
SURFACE TREATMENT FOR CYLINDER LINERS
AND PISTON RINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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Cylinder head and valve

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FAILURE SIGNS, THEIR CAUSES AND DIAGNOSIS
FOR REUSAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
• Inspection points for parts reusage diagnosis
• Standards for failure determination
TYPICAL EXAMPLES OF FAILURES . . . . . . . . . . . . . . . . . . . 29
• Cylinder head failures
• Valve failures
FAILURES AND THEIR CAUSES . . . . . . . . . . . . . . . . . . . . . . 34
• Cooling water
• Lubricating oil
• Fuel
• Air intake
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . 35
CONSTRUCTION AND FUNCTION . . . . . . . . . . . . . . . . . . . . . 36
• Cylinder heads
• Valves
BASIC MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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THE STRUCTURE AND FUNCTION OF A DOZER

ENGINES
TORQUE CONVERTERS
TRANSMISSIONS
DIFFERENTIALS
FINAL DRIVES
BRAKES
TYRES
UNDERCARRIAGE
STEERING
OPERATOR’S COMPARTMENT
HYDRAULIC SYSTEMS
LOADER RATINFS
MAINTENANCE AS A
CONSIDERATION
THE DEALER
SUMMARY






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