Introduction to GM Diesel Locomotive Handbook

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Questions and Answers

What component controls the maximum oil pressure in the main lubricating oil system?

Pressure relief valve (correct)

Main oil manifold

Oil strainer

Oil pump

Which of the following is primarily lubricated by oil from the upper half of the crankshaft main bearings?

Camshaft drive gear

Vibration damper

Turbo charger

Connecting rod bearings (correct)

Which part of the lubricating oil system directs oil to various components through passages?

Base of the stub shaft (correct)

Main oil manifold

Oil cooler

Camshaft stub shafts

How does the turbo charger receive lubrication in the system?

Through turbo oil manifold from the filter line Signup and view all the answers

What happens to excess oil that exceeds the set pressure in the main lubricating oil system?

It returns to the oil sump Signup and view all the answers

What is the function of the Automatic Brake Handle in the CCU when set to the Emergency position?

It creates an immediate stop regardless of the train's speed. Signup and view all the answers

In which position is the Air Brake Trail/Lead Setup Switch when both automatic and independent brake functions are isolated, except for emergency functions?

Trail Signup and view all the answers

What happens when the Air Brake Lead Out Switch is activated?

Only automatic brakes function during emergencies. Signup and view all the answers

Which of the following controls is NOT part of the Control and Operating Switch setup on the CCU?

Throttle Control Slide Switch Signup and view all the answers

What is the primary role of the Independent Brake Handle in the CCU?

To allow for manual application and release of brakes. Signup and view all the answers

Which type of switch operates the fuel pump in the CCU?

Fuel Pump Control Slide Button Switch Signup and view all the answers

When the CCU is in the Lead Position, what is the status of the automatic brakes?

They function normally. Signup and view all the answers

Which light on the indicating light panel signals a potential wheel slip condition?

Wheel slip light Signup and view all the answers

What is the primary function of the reset (alertness control) push button switch?

To sense the driver’s alertness Signup and view all the answers

Which panel on the driver’s cab end is responsible for controlling various engine functions?

Engine control panel Signup and view all the answers

What does the manual sanding switch do?

Applies sand to the wheels Signup and view all the answers

Which component must be 'ON' for proper loco operation according to the circuit breaker panel?

Breakers in the 'black' section Signup and view all the answers

What function does the horn push button switch serve?

Sounds the locomotive horn Signup and view all the answers

What is the purpose of the clip board located in the driver’s cab?

To keep operational paperwork Signup and view all the answers

Which of the following is NOT part of the indicating light panel?

Tractive effort meter Signup and view all the answers

What indicates that the driver should ensure alertness before loco operation?

Reset (alertness control) push button switch Signup and view all the answers

What is the purpose of the scavenging pump in the engine?

To supply oil to the main lube oil pump Signup and view all the answers

What type of turbocharger system is incorporated in the locomotive?

Turbo supercharger with after cooler Signup and view all the answers

Which component is located at the right side of the engine?

Fuel pump Signup and view all the answers

Which of the following statements is true regarding the lube oil strainer housing?

It consists of two strainer elements. Signup and view all the answers

What type of filters are used in the engine mounted fuel oil secondary filter?

Paper type, spin-on Signup and view all the answers

Where is the engine start switch (fuel prime) located?

Left side of the engine equipment rack Signup and view all the answers

Which component is not typically found in the engine accessories compartment?

Turbo supercharger Signup and view all the answers

What is the role of the EPD (Engine Protection Device)?

To protect the engine from damage Signup and view all the answers

How many auxiliary starting motors are provided in the locomotive?

Two Signup and view all the answers

What type of brake is applied by the Hans brake in the engine accessories compartment?

5th wheel brake Signup and view all the answers

What is the purpose of the regulating valve with a sight glass in the fuel supply manifold?

To ensure constant fuel supply at 10 PSI. Signup and view all the answers

How does the timing of each unit injector in the fuel injection system get determined?

By the camshaft operation. Signup and view all the answers

Which component in the GM locomotive fuel injection system helps to regulate the quantity of fuel injected?

The wood word governor. Signup and view all the answers

What indicates an issue in the fuel feed system according to the sight glass?

Presence of air bubbles or interrupted flow. Signup and view all the answers

What is one notable difference between the fuel tank capacities of GM and Alco locomotives?

GM locomotive has a larger tank capacity than Alco locomotive. Signup and view all the answers

What role does the atomization of fuel play in the fuel injection system?

It ensures proper combustion in the cylinder. Signup and view all the answers

Which component provides fuel safety in the fuel feed pump for both GM and Alco locomotives?

The relief valve. Signup and view all the answers

What is the primary function of the individual fuel injector nozzles in the system?

To allow for fuel atomization. Signup and view all the answers

Which of the following correctly reflects a difference between the GM and Alco locomotive fuel systems?

The arrangement and design of the components differ between the two. Signup and view all the answers

What is the main purpose of the wood word governor in the fuel injection system?

To control the quantity of fuel based on load conditions. Signup and view all the answers

Study Notes

Introduction Handbook on General Motor Diesel Locomotive

This handbook details the General Motor (GM) locomotive, used by Indian Railways.
It was produced by CAMTECH in February 2006.
The handbook is intended for diesel shed staff.
The GM locomotive models include GT46 MAC (goods service) and GT46 PAC (passenger service).
It features a 4000 BHP engine (model 710G3B).
The GM locomotives, manufactured at DLW, Varanasi, have better fuel efficiency compared to Alco design locomotives.
The book aims to provide introductory information regarding GM locomotive maintenance.

General Information Data

Model Designation: GT46MAC
Under Truck: CO-CO Type
Nominal Locomotive Power: 4000HP
Engine Model: 710G3B
Number of Cylinders: 16
Engine Type: Two-Stroke, Turbo Charged
Cylinder Arrangement: 45° "V" arrangement
Compression Ratio: 16:1
Displacement per Cylinder: 11635cm³ (710 Cu.In)
Cylinder Bore: 230.19 mm (9-1/16")
Cylinder Stroke: 279.4 mm (11")
Rotation (Facing Generator End): Counter-clockwise
Full Speed: 904 RPM
Normal Idle Speed: 269 RPM
Low Idle Speed: 200 RPM
Main Generator: TA17-CA6B
Traction Alternator: TA17
Companion Alternator: CA6B
Maximum Voltage: 2600 VDC

Introduction of the GM Locomotive

The WDG4& WDP4 series of DLW make locomotives are GM (General Motor) locomotives.
The GM locomotive is computer controlled.
The GM locomotive is equipped with a microprocessor based computer control system(EM2000).
The EM2000 computer is able to provide diagnostic testing and record locomotive faults.
The GM locomotives are equipped with engine parts like Engine, Turbo super charger, compressor, alternator and Traction motors.
The GM locomotives are equipped with lube oil system, cooling water system, charged air system, compressed air system, air brake system and many safety devices.
The GM locomotive has a 16 cylinder, two-stroke V-arrangement internal combustion engine.

Contents (Page numbers are included for reference)

Page i: Preface
Page ii: Contents
Page iii: Book Details
Page iv: Correction Slips
Page 1–2: Introduction of the GM Locomotive
Page 3–6: General information data
Page 7-21: Various parts and its location
Page 22-25: Fuel Oil System
Page 26–30: Cooling Water System
Page 31–37: Lube Oil System
Page 38–41: Air Intake System
Page 42–43: Compressed air system
Page 44–59: CCB Air Brake System
Page 50–52: Electrical System
Page 53–55: Computers control of locomotive
Page 56–63: Major equipments of GM locomotives
Page 64–65: Differences between WDG4 & WDP4 Locomotives

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Description

This quiz covers the essentials of the General Motor diesel locomotive, specifically focusing on the GT46 MAC and GT46 PAC models. The handbook serves as an introductory guide for diesel shed staff, detailing the maintenance and specifications of these locomotives. Learn about engine performance, design, and improved fuel efficiency compared to older Alco designs.