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CONTENTS IntroductionAxle ShaftGear wheel endRoad wheel end Traction WheelWheel press machineWAP-4 Salient featuresWAG-7 Salient features
Condition of failuresTm pinion teeth broken seizureAxle box bearing seizureGear teeth broken seizureTapper roller bearing seizureEnclosure rotate seizureBearing housing moving loose seizureRacer loose seizureRacer spotted seizureMSU (Motor Suspension Unit) Rib Crack
seizure
AXLEA central shaft for a rotating wheel or
gear.
Axle may be fixed to the wheels rotating with them, or fixed to its surroundings.
Bearing or bushing provided at mounting points.
Bearing or bushing sits inside the hole in the wheel.
SHAFT
Shaft is a mechanical component transmits torque and rotation.
Shaft used to connect other components of a drive train can not be connected directly.
Shaft are carries of torque.
Shaft subject to torsion and shear stress.
Gear wheel end
• AXLE COLLER• BULL GEAR• ENCLOSURE• END COVER• TAPPER ROLLER
BEARING• BEARING RACER
CUP
Road wheel end
• ADJUSTMENT WASHER• BEARING HOUSING• BEARING RACER CUP• TAPPER ROLLER
BEARING• END COVER• ABUTMENT PIECE
TRACTION MOTORMODEL NO. HS-15250ACAPACITY 630 KWRATING CONSTVOLTAGE 750 VEXCITATION SERIESCURRENT 500 ACOOLING AIR 80 m3/minSPEED 895 rpmPOLES 6
WHEELWheel of a rake is a specifically made
cylindrical portion having an outer edge shape to fit in the railway track. The material is stainless steel.
New wheel diameter is 915 mm.
Cundem wheel diameter is 825 mm.
Workshop release diameter is 837 mm.
Wap-4TYPES OF LOCOMOTIVE
WAP-4
GAUGE 1676 mm
WHEEL ARRANGEMENT CO-CO
SERVICE PASSENGER
RATING OF TRACTION MOTOR
630 KW
GEAR RATIO 23/58
MAX.SERVICE SPEED 140 km/hr
CONT.POWER OF LOCO 5060 hp
WAG-7TYPES OF LOCOMOTIVE
WAG-7
GAUGE 1676 mm
WHEEL ARRANGEMENT CO-CO
SERVICE FREIGHT
RATING OF TRACTION MOTOR
HITACHI HS15250A
GEAR RATIO 16/65
MAX. SERVICE SPEED 100 km/hr
CONT. POWER OF LOCO 5000 hp
CONDITION OF FAILURES 1.TM pinion (TEETH BROKEN)SEIZURE
• Improper quality of oil.• Inspect for crack.• The spiral teeth of the pinion each have different spiral
angles.• Tm-4 pinion teeth broken as suspected collar matching.
2.Axle box bearing seizure
• Clearance as per specification.• Improper lubrication.• Over heat the bearing.• Axle box bearing over heat on piece of railway rolling stock.
3.Gear teeth broken seizure
• There is no crack on teeth.• Same height of all teeth.• Same angle of all teeth.• Improper lubrication.
4.Tapper roller bearing seizure
• Proper mounting.• Misalignment.• Bearing fatigue and corrosion.• Defective sealing.• High temperature.
5.Enclosure rotate seizure
• Brake the 6 bolts then enclosure is rotate.• Enclosure is not fatigue and corrosion.• High temperature.• Improper lubrication.
6.Bearing housing moving loose
• Size of MSU cup is increase on non gear side.• Break the 8 bolts then bearing housing is loose.• Racer loose.• Bearing spotted .
7.Racer loose seizure
• Gear or non gear side temperature is rising.• Bolts loose.• Abnormal sound in MSU.• Housing loose.
8.Recer spotted seizure
• Sound in axle bearing.• The metal contact comes on mid of the roller
then racer is damage.• Abnormal sound in MSU.• Improper lubrication.