Engine Components & Cylinder Firing Order
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Questions and Answers

What should always be consulted for the correct firing order and timing of the engine?

  • Safety Protocol Document
  • Troubleshooting Guide
  • User Manual
  • Engine Maintenance Manual (correct)

    • Which of the following parts is NOT listed as a component related to engine function?

  • Piston Cooling Oil Pipe
  • Navigation System (correct)
  • Exhaust Valve Spring
  • Cylinder Head

    • What component is responsible for controlling the fuel injection into the engine?

  • Air Box
  • Fuel Manifold
  • Cylinder Test Valve
  • Injector Rack (correct)

    • Which part is used to manage the cooling of the piston?

    <p>Piston Cooling Oil Pipe</p> Signup and view all the answers

    Which of these components is involved in the exhaust system of the engine?

    <p>Exhaust Valve</p> Signup and view all the answers

    What is the function of the 'Air Box' within the engine components?

    <p>To facilitate air intake</p> Signup and view all the answers

    Which component is responsible for maintaining the main lubricant flow in the engine?

    <p>Main Lube Oil Manifold</p> Signup and view all the answers

    What is the primary function of the oil pan in a diesel engine?

    <p>To check the oil level and drain the sump</p> Signup and view all the answers

    Which component is NOT part of the power assembly in a diesel engine?

    <p>Fuel injector</p> Signup and view all the answers

    What type of oil pan can be found in marine applications?

    <p>Marine Type Oil Pan</p> Signup and view all the answers

    How are the power assembly components typically serviced in a diesel engine?

    <p>They can be removed piece by piece or as a complete unit</p> Signup and view all the answers

    What material is generally used to fabricate the oil pan?

    <p>Steel plating</p> Signup and view all the answers

    What is a primary feature of the spring pack torsional damper?

    <p>It is utilized on all 567 engines and specific blower engines.</p> Signup and view all the answers

    Which torsional damper is recommended as an upgrade for engines using a 3 pack damper?

    <p>6 pack damper</p> Signup and view all the answers

    Which of the following statements is true regarding EMD engine dampers?

    <p>Four types of torsional dampers have been identified.</p> Signup and view all the answers

    How many types of torsional dampers are mentioned in the content?

    <p>Four</p> Signup and view all the answers

    What is the primary function of torsional dampers in EMD engines?

    <p>To minimize vibrations and torsional stress.</p> Signup and view all the answers

    Which component is NOT mentioned as a type of torsional damper?

    <p>Fluid type</p> Signup and view all the answers

    What is the specific application of the spring pack damper?

    <p>Used in all 567 engines and certain blower engines.</p> Signup and view all the answers

    Which torsional damper provides an upgrade from the 3 pack design?

    <p>6 pack damper</p> Signup and view all the answers

    What does the 6 pack damper improve upon compared to the 3 pack damper?

    <p>Vibration control</p> Signup and view all the answers

    What is the weld size for the A-frame attachment on the 567C and earlier models?

    <p>3/8&quot;</p> Signup and view all the answers

    Which model has a weld size of 1/2" for the A-frame attachment?

    <p>645E, 1968 and later</p> Signup and view all the answers

    What is the distinguishing feature of the heavy 'A' frame in models starting with 71D?

    <p>Increased weight capacity</p> Signup and view all the answers

    For the 645E model, what is the weld size for those manufactured before 1971?

    <p>3/8&quot;</p> Signup and view all the answers

    Which series of engines includes models 567, 645, and 710?

    <p>ElectrMotive Series</p> Signup and view all the answers

    What is the minimum weld size for the A-frame attachment on the 5670 model?

    <p>3/8&quot;</p> Signup and view all the answers

    Which modification to the A-frame is noted for models starting with the 71D serial number?

    <p>Heavy 'A' frame configuration</p> Signup and view all the answers

    Which feature differentiates the new heavy 'A' frame from the previous versions?

    <p>Weight capacity</p> Signup and view all the answers

    What is the weld size for the A-frame attachment on models 645E, serial starting with 1971?

    <p>1/2&quot;</p> Signup and view all the answers

    What modification applies specifically to the crankcase of model 645E from the year 1968 and later?

    <p>Weld size change</p> Signup and view all the answers

    What design feature allows for a compact layout of the cylinder bores on opposite banks?

    <p>They share one throw of the crankshaft.</p> Signup and view all the answers

    What is the purpose of the exhaust passages in the crankcase assembly?

    <p>To carry exhaust gases to the exhaust manifold.</p> Signup and view all the answers

    What do handholes in the crankcase assembly allow for?

    <p>Inspection and servicing of components.</p> Signup and view all the answers

    What do the A-frames do in the crankcase assembly?

    <p>Form main bearing supports for the crankshaft.</p> Signup and view all the answers

    What feature runs the full length of the engine and provides lubrication to the main bearings?

    <p>Standpipe.</p> Signup and view all the answers

    Where are the piston cooling manifolds located in relation to the crankcase?

    <p>On each side of the crankcase.</p> Signup and view all the answers

    What do the base rails along the sides of the crankcase allow for?

    <p>Mounting of the oil pan.</p> Signup and view all the answers

    What is the primary function of the piston cooling manifolds?

    <p>To deliver oil to the underside of each cylinder assembly.</p> Signup and view all the answers

    What is one of the key structural features of the crankcase that supports the crankshaft?

    <p>A-frames.</p> Signup and view all the answers

    What is the weld size for the A-frame attachment on models manufactured between 1968 and 1970 for the 645E series?

    <p>1/2&quot;</p> Signup and view all the answers

    Which A-frame attachment weld size is associated with the 5670 models?

    <p>3/8&quot;</p> Signup and view all the answers

    What features differentiate the heavy 'A' frame found in models starting with the 71D from earlier ones?

    <p>Enhanced structural integrity</p> Signup and view all the answers

    Which of the following statements about the A-frame constructions is incorrect?

    <p>Earlier models had a consistent weld size of 1/2&quot;.</p> Signup and view all the answers

    Which model is associated with a weld size of 1/4" for the A-frame attachment?

    <p>567C and earlier</p> Signup and view all the answers

    What is a key distinguishable feature of the new heavy 'A' frame compared to previous designs?

    <p>Increased structural support</p> Signup and view all the answers

    What is the weld size for the A-frame attachment on the 645E model manufactured in 1968 and later?

    <p>1/2&quot;</p> Signup and view all the answers

    What is a function of the tubes in the oil pan of a diesel engine?

    <p>To serve as drains for the air boxes</p> Signup and view all the answers

    Which of the following describes a marine type oil pan?

    <p>It has larger capacity for extended use.</p> Signup and view all the answers

    What component of the diesel engine power pack is responsible for connecting the piston to the crankshaft?

    <p>Connecting rod assembly</p> Signup and view all the answers

    How can the power assembly be serviced according to maintenance practices?

    <p>Either piece by piece or as a complete unit</p> Signup and view all the answers

    What material is primarily used in the fabrication of the oil pan for a diesel engine?

    <p>Steel plating for durability</p> Signup and view all the answers

    What is the significance of the serial numbers stamped on both the 'A' frames and bearing caps?

    <p>They help in identifying compatibility between parts.</p> Signup and view all the answers

    Why are the main bearing caps not interchangeable between positions?

    <p>Each cap is uniquely designed for stress distribution.</p> Signup and view all the answers

    How are the main bearing caps secured in place?

    <p>By studs with nuts on the top and bottom.</p> Signup and view all the answers

    What is the purpose of the D nuts in the main bearing cap assembly?

    <p>To prevent the nuts from turning.</p> Signup and view all the answers

    During the final machining of the crankcase, what process is implemented to ensure proper fitment?

    <p>Line boring of all main bearing caps.</p> Signup and view all the answers

    What happens if the main bearing caps are installed incorrectly?

    <p>There will be increased wear on the crankshaft.</p> Signup and view all the answers

    What is a key feature of the nuts used on the main bearing caps?

    <p>They are shaped to fit into specific recesses.</p> Signup and view all the answers

    What aspect of the main bearings is critical for maintaining engine performance?

    <p>The precision of line boring during machining.</p> Signup and view all the answers

    What would be a consequence of failing to secure the main bearing caps properly?

    <p>Increased noise levels during operation.</p> Signup and view all the answers

    What is the purpose of the holes in the coupling disc?

    <p>For an engine turning bar to manually rotate the crankshaft</p> Signup and view all the answers

    What do the degree and top dead center markings on the coupling disc provide?

    <p>Reference during maintenance procedures</p> Signup and view all the answers

    Which component is bolted to the rear of the crankshaft?

    <p>Ring gear and coupling disc</p> Signup and view all the answers

    Which of the following functions does the coupling provide?

    <p>Engagement for the starting motors</p> Signup and view all the answers

    What material is likely used for the crankshaft and coupling disc given its requirements?

    <p>Steel for strength and durability</p> Signup and view all the answers

    What is a likely consequence of not having degree and top dead center markings on the coupling disc?

    <p>Confusion during timing adjustments</p> Signup and view all the answers

    What component interacts with the coupling disc during normal engine operation?

    <p>Starting motor</p> Signup and view all the answers

    In what context would the markings on the coupling disc be particularly useful?

    <p>During maintenance procedures</p> Signup and view all the answers

    Why is a coupling disc critical for the crankshaft's functionality?

    <p>It provides a connection to the generator</p> Signup and view all the answers

    What would be an implication of a faulty ring gear on the coupling disc?

    <p>Failure to engage the starting motors</p> Signup and view all the answers

    What is the purpose of the heavy flywheel fitted to some stationary and marine engine applications?

    <p>To maintain constant engine speed by smoothing out vibrations</p> Signup and view all the answers

    Where is a torsional damper typically located in relation to the crankshaft?

    <p>At the front of the crankshaft</p> Signup and view all the answers

    Which of the following best describes the function of a torsional damper?

    <p>To absorb crankshaft torsional vibrations</p> Signup and view all the answers

    What component provides the flywheel effect in generator applications?

    <p>The main generator rotor</p> Signup and view all the answers

    Which scenario would require the use of a heavy flywheel in an engine?

    <p>In applications with no generator present</p> Signup and view all the answers

    What might be a potential consequence if a torsional damper fails?

    <p>Excessive crankshaft vibrations</p> Signup and view all the answers

    Which type of engine applications typically do not involve a generator and therefore require a heavy flywheel?

    <p>Stationary and marine engines</p> Signup and view all the answers

    What is another term commonly used to refer to a torsional damper?

    <p>Harmonic balancer</p> Signup and view all the answers

    In which location is the damper attached in a typical engine assembly?

    <p>In front of the crankshaft</p> Signup and view all the answers

    What role does the torsional damper play in the accessory drive gear?

    <p>It absorbs torsional vibrations from the crankshaft</p> Signup and view all the answers

    Study Notes

    Engine Components & Construction

    • GM 567, 645, and 710 Diesel engines are "V" design, available in 8, 12, 16, and 20 cylinder models.
    • Most engines have left-hand (counterclockwise) rotation, viewed from the rear. Some marine applications use right-hand (clockwise).
    • Camshaft gear train and turbocharger/Roots blower are located on the rear of the engine.
    • Governor, oil pumps, water pumps, and strainer housing are on the front/accessory end.
    • Engines are mounted backwards in locomotives; the rear faces the front.
    • Cylinders are in pairs, using a common throw on the crankshaft.
    • Left bank is on the left side of the engine, right bank on the right side, as viewed from the rear, towards the governor.
    • The engine is a dry-block design. Separate water jackets surround the cylinder liners.

    Cylinder Firing Order

    • Opposing cylinders fire 45° apart on the crankshaft.
    • A 16-cylinder engine has one cylinder firing every 22.5° of crankshaft rotation.
    • Firing order is balanced in a 16-cylinder engine (Example: 1, 8, 9, 16, 3, 6, 11, 14, 4, 5, 12, 13, 2, 7, 10, 15).
    • 12 and 20 cylinder engines have unbalanced firing orders.

    16 Cylinder Engine

    • Cylinders are numbered 1-8 on the right bank, 9-16 on the left, starting from the front.
    • Cylinders are paired, such as 1 and 9, 8 and 16.

    Engine Evolution

    • Various models (567U/V, 567A, 567B, 645, and 710) show improvements in specifications, power, and features (Water decks, Gear train bracket, Dry block, Blowers, Turbo improvements, etc.)
    • Over various years, different iterations of the Engines included various innovations like dry blocks, water decks, dry blocks, and turbo systems, among other elements.

    Components

    • Crankcase is the main structural component of the engine.
    • The GM engine is a dry-block design, using separate water jackets for the cylinder liners.

    Other

    • The crankcase assembly has handholes to allow inspection and servicing of components
    • The main structural part of the engine is the crankcase, or engine block.
    • Different types of cylinder liners and pistons have been used - chrome-plated or stellite.
    • There are different types of exhaust valves.
    • The cylinder head has passages for coolant and exhaust, and a fireface for mating with the cylinder liners.
    • The cylinder heads have different designs over time.
    • The internal cylinders are lined with water jackets to retain coolant.
    • Engines used different types of oil pans (standard, extended, and marine)
    • The oil pan is used for storing lubricating oil and checking the oil levels.
    • The engine uses various types of connecting rods (interlocking design), which varies based on the 645, 645E, and 710 models.
    • The camshafts are driven by the crankshaft at a 1:1 ratio.

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    Student Text - Mechanical - 38-73 PDF

    Description

    This quiz covers the key components and construction of GM 567, 645, and 710 Diesel engines, focusing on their design and assembly. It also examines the firing order of cylinders in a 16-cylinder engine and how these components interact during operation.

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