Freight Stock Maintenance POH & IOH
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Questions and Answers

What is the recommended replacement rate for split pins of the brake shoe key during POH?

  • 75%
  • 50%
  • 25%
  • 100% (correct)

    • Why is the 100% replacement of elastomeric pads recommended during POH?

  • They are rubber components that can get damaged. (correct)
  • They cause delays in braking.
  • They are susceptible to wear and tear.
  • They enhance the performance of the braking system.

    • What is the primary role of the knuckles in the draw and buffing gear assembly?

  • To couple two train parts together. (correct)
  • To provide stability to the train structure.
  • To resist wear on the lug area.
  • To connect the brake gear.

    • What is the action recommended for CTRB locking plates during POH?

    <p>Replace 100% of locking plates.</p> Signup and view all the answers

    What is the committee's recommendation regarding indigenous knuckles?

    <p>Replace them with upgraded knuckles as per WD-70-BD-10.</p> Signup and view all the answers

    What is the recommended action for the Rotary Lock Lift Assembly due to its condition after one POH cycle?

    <p>100% replacement of the item</p> Signup and view all the answers

    What results from the wear of the Yoke Pin support plate liner?

    <p>Breakage of Support plate rivets</p> Signup and view all the answers

    What is the expected life of the Shank Wear Plate component?

    <p>Less than one POH cycle</p> Signup and view all the answers

    Why is the Striker Casting Wear Plate component significant?

    <p>Worn out component leads to uncoupling of CBCs</p> Signup and view all the answers

    What is the extent of replacement some workshops are achieving for the Yoke Pin support plate liner?

    <p>70%</p> Signup and view all the answers

    What does interaction of the Yoke Pin's vertical movement cause?

    <p>Formation of a dent mark on the liner</p> Signup and view all the answers

    What level of replacement does the committee recommend for the worn out Wear Plate components?

    <p>100% replacement during POH</p> Signup and view all the answers

    What is the primary reason for the majority of uncoupling cases in locks?

    <p>Worn out locks</p> Signup and view all the answers

    What does the committee recommend for the indigenous CBC locks?

    <p>One time replacement with upgraded locks</p> Signup and view all the answers

    What specific issue is commonly found with the Anti-Creep Lug of the Lock Lifter Assembly?

    <p>Worn condition</p> Signup and view all the answers

    What is the dimension of the bearing piece slot that becomes worn out in service?

    <p>17.5 mm x 17.5 mm</p> Signup and view all the answers

    How does the alignment of the Lock Lifter Assembly get disturbed?

    <p>Due to loose riveting</p> Signup and view all the answers

    What is the recommended frequency of replacement for the lock lift assembly?

    <p>One time replacement</p> Signup and view all the answers

    What percentage does the consumption of lock lift assemblies vary between workshops?

    <p>3% to 33%</p> Signup and view all the answers

    What is being developed by RDSO as per WD-70-BD-10?

    <p>Upgraded couplers and lock lift assemblies</p> Signup and view all the answers

    What action should be taken for serviceable locks during train examinations?

    <p>Use them for replacements</p> Signup and view all the answers

    What is the primary concern regarding dirt collectors in depots during ROH?

    <p>They are not opened and cleaned</p> Signup and view all the answers

    What does the committee recommend concerning the Dirt Collector Filter?

    <p>100% replacement during ROH</p> Signup and view all the answers

    Which of the following items is specified for 100% replacement during ROH due to its perishable nature?

    <p>Rubber gaskets</p> Signup and view all the answers

    How are MU washers categorized in terms of maintenance recommendations?

    <p>They require 100% replacement during ROH</p> Signup and view all the answers

    What is the nature of the Tank wagons' Filling Pipe Joint Ring?

    <p>They are perishable rubber items</p> Signup and view all the answers

    Which item is recommended to be replaced during POH due to the perishable nature of its materials?

    <p>Drain Plug leather washer</p> Signup and view all the answers

    What happens to rubber items like the Dirt Collector Washer when assemblies are opened?

    <p>They get damaged</p> Signup and view all the answers

    What is the significance of the recommended 100% replacement policy during ROH?

    <p>To prevent future malfunctions</p> Signup and view all the answers

    How are the rubber gaskets described in terms of physical characteristics?

    <p>They are small-valued and perishable</p> Signup and view all the answers

    Which item is specifically associated with the risk of malfunction if not maintained properly?

    <p>Dirt Collector Filter</p> Signup and view all the answers

    What is the primary reason for the 100% replacement of the CASNUB bogie side frame during POH?

    <p>Due to wear from contact with the adaptor.</p> Signup and view all the answers

    Why should no weld metal deposit be done on the pedestal jaw surfaces?

    <p>To ensure smooth surface and proper clearance.</p> Signup and view all the answers

    What does the committee recommend for the pedestal jaw liners?

    <p>To perform 100% replacement during POH.</p> Signup and view all the answers

    Which of the following items is expected to last from POH to POH without immediate replacement?

    <p>Pocket slope liners.</p> Signup and view all the answers

    What is required to weld the liners that are suggested for replacement?

    <p>Linings of suitable thickness.</p> Signup and view all the answers

    What must be done to the bolt when dismantling the wheel from the bogie?

    <p>The bolt needs to be cut.</p> Signup and view all the answers

    What type of wear is primarily associated with the bolster land surface liner?

    <p>Mechanical wear.</p> Signup and view all the answers

    What aspect is emphasized as crucial for the liners in the original design according to the committee's recommendation?

    <p>Smoothness of the surface.</p> Signup and view all the answers

    Which item requires only replacement during POH due to consistent wear?

    <p>Bolster land surface liner.</p> Signup and view all the answers

    What is the general purpose of these recommendations by the committee?

    <p>To ensure safe operation and longevity of the components.</p> Signup and view all the answers

    What issue is primarily observed with the Anti-Creep Lug of the Lock Lifter Assembly?

    <p>Worn condition affecting functionality</p> Signup and view all the answers

    What has been noted as a common result of loose riveting in the Lock Lifter Assembly?

    <p>Disturbed alignment of the assembly</p> Signup and view all the answers

    Which recommendation is made for the CBC locks as per the committee's observation?

    <p>One-time replacement with upgraded locks</p> Signup and view all the answers

    Why is the wear of the bearing piece slot considered significant?

    <p>It prevents the operating handle from functioning properly</p> Signup and view all the answers

    What percentage variation in consumption of lock lift assemblies is observed between workshops?

    <p>3% to 33%</p> Signup and view all the answers

    What type of locks is being replaced with upgraded versions according to WD-70-BD-10?

    <p>Indigenous CBC locks within the entire system</p> Signup and view all the answers

    What is a direct consequence of the wear on the operating handle's positioning?

    <p>Reduced capability to couple wagons</p> Signup and view all the answers

    What is the significance of upgrading knuckles as per WD-70-BD-10?

    <p>To enhance the coupling reliability during service</p> Signup and view all the answers

    During the inspection of braking components, which item is noted for 100% replacement due to its tendency to become distorted?

    <p>Split Pin of Brake Shoe Key</p> Signup and view all the answers

    What are the consequences of removing the locking plates as recommended during UST of wheel sets?

    <p>Damage to the tabs of locking plates</p> Signup and view all the answers

    What is the role of elastomeric pads in train maintenance, as highlighted in the recommendations?

    <p>To absorb vibrations and improve ride quality</p> Signup and view all the answers

    Why might workshops opt to change the elastomeric pads before reaching the full POH duration?

    <p>To prevent unexpected failures during operations</p> Signup and view all the answers

    What is the justification for the 100% replacement of the CASNUB bogie?

    <p>The bolt is tack welded, making removal difficult without cutting.</p> Signup and view all the answers

    Why is the 100% replacement of the CTRB locking plates recommended during ROH?

    <p>Tabs are frequently damaged or broken upon removal.</p> Signup and view all the answers

    What impact does worn out Striker Casting Wear Plates have?

    <p>They can cause ovality on the top portion of the Yoke Pin hole.</p> Signup and view all the answers

    What is a common issue with split pins during the replacement process?

    <p>They can distort or get damaged while removing brake blocks.</p> Signup and view all the answers

    What is emphasized about the need for replacing wear plates within the CBC component?

    <p>Serious impact on uncoupling and damage to components can occur if not replaced.</p> Signup and view all the answers

    Which component's locking plates are replaced due to damage observed during regular inspections?

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

    What is the basis for the recommendation to replace split pins 100% in some depots?

    <p>They get distorted or damaged upon brake block removal.</p> Signup and view all the answers

    What type of item is compared to the CASNUB bogie in terms of replacement necessity?

    <p>Locking plates</p> Signup and view all the answers

    Why are locking plates in the CBC component removed during wheel set inspections?

    <p>Their removal can lead to damage or breakage.</p> Signup and view all the answers

    What is the primary reason for the committee's recommendation of 100% replacement of the CASNUB bogie side frame during POH?

    <p>It is continuously in contact with other components and wears out.</p> Signup and view all the answers

    Why is it important that no weld metal deposit is done on the pedestal jaw surfaces?

    <p>To maintain the necessary clearances without additional machining.</p> Signup and view all the answers

    What action is required to dismantle the wheel from the bogie?

    <p>Cut the bolt since it is tack welded with the nut.</p> Signup and view all the answers

    What does the committee suggest regarding the original design of the liners?

    <p>The focus should be on surface smoothness rather than material thickness.</p> Signup and view all the answers

    Which item is expected to wear and necessitate 100% replacement during POH?

    <p>All the above items</p> Signup and view all the answers

    What is the role of liners that are required to be welded, according to the committee's recommendation?

    <p>To maintain consistent contact and functionality between components.</p> Signup and view all the answers

    What is a potential consequence of neglecting to replace the pocket slope liner during POH?

    <p>Increased vibration leading to system failure.</p> Signup and view all the answers

    How does the committee recommend dealing with worn-out caster lining components?

    <p>Conduct 100% replacements during POH.</p> Signup and view all the answers

    Which condition may lead to additional wear of the bolster land surface liner?

    <p>Improper alignment of adjoining components.</p> Signup and view all the answers

    What is the fundamental purpose behind the committee's replacement recommendations?

    <p>To avoid incidents caused by component failure.</p> Signup and view all the answers

    What is the primary reason for the recommended 100% replacement rate of the Dirt Collector Filter during ROH?

    <p>To prevent DV malfunctioning and brake bindings in service</p> Signup and view all the answers

    Which of the following items is acknowledged as being perishable and requiring 100% replacement during ROH?

    <p>Filling Pipe Joint Ring</p> Signup and view all the answers

    Why are items like the MU washers recommended for 100% replacement during ROH?

    <p>They are rubber items that get damaged while opening assemblies</p> Signup and view all the answers

    What is a common issue identified with dirt collectors in depots during maintenance operations?

    <p>They are rarely opened for cleaning during ROH</p> Signup and view all the answers

    What role do the rubber gaskets play in the context of air brake system maintenance?

    <p>They are perishable items that can get damaged during assembly opening</p> Signup and view all the answers

    Which item is identified as a critical replacement during the Periodic Overhaul (POH) due to its perishable nature?

    <p>BC Drain Plug Leather Washer</p> Signup and view all the answers

    How are the rubber items like the Dirt Collector Washer classified in the maintenance recommendations?

    <p>As perishable items that need regular replacement</p> Signup and view all the answers

    What potential consequence arises from failing to perform regular replacements of recommended components during ROH?

    <p>Increased risk of DV malfunctioning and brake failures</p> Signup and view all the answers

    What is indicated about AR Drain Plug leather washers in terms of maintenance actions?

    <p>They require immediate replacement during POH</p> Signup and view all the answers

    Which of the following items is specifically mentioned as needing to be replaced due to its nature of degradation over time?

    <p>Rubber gaskets</p> Signup and view all the answers

    Study Notes

    Appendix V - Must Change Items in Freight Stock During POH & IOH

    • Items to be replaced during ROH (Routine Overhaul):
      • SF Key nut bolt with washer: 100% replacement is needed during dismantling of wheels.
      • Split Pin 12 x 110 mm: 100% replacement due to damage/distortion in some depots.
      • CTRB Locking plate: 100% replacement for damage during wheel set inspection.
      • Striker casting Wear Plate: 100% replacement due to wear and impact on uncoupling.
      • CBC: 100% replacement, due to wear in contact with CBC shank.
      • Air Brake System – Dirt Collector Filter: 100% replacement recommended due to multiple cases of malfunction.

    Appendix V – Must Change Items in Freight Stock During POH (Periodic Overhaul)

    • CASNUB BOGIE Side Frame:

      • Pedestal Jaw Liners: 100% replacement due to wear.
      • SF Key nut bolt with washer: 100% replacement.
      • Bolster Land surface liner: 100% replacement for wear.
      • Pocket slope liner: 100% replacement due to wear.
      • Rotation stop lug liner: 100% replacement due to wear.

    • Bogie Brake Gear:

      • Split Pin 12 x 110 mm: 100% replacement due to distortion/damage.
      • CTRB Locking plate: 100% replacement for damage during inspection.
      • Elastomeric pads: 100% replacement due to wear.

    • Draw and Buffing Gear Assembly:

      • Knuckle: 100% one-time replacement with upgraded knuckles as per WD70-BD-10.
      • CBC Lock: 100% one-time replacement with upgraded CBC locks as per WD70-BD-10.

    • Rotary Lock Lift Assembly: 100% one-time replacement with upgraded lock lift assembly as per WD70-BD-10.

      • Bearing Piece: 100% replacement due to wear, slot damage.

    • Yoke Pin support plate liner: 100% replacement, due to wear.

    • Shank Wear Plate: 100% replacement due to wear.

      • Striker Casting Wear Plate: 100% replacement due to wear.

    • Air Brake System:

      • Dirt Collector Filter: Recommended for 100% replacement due to malfunction risks.

    • Tank wagons:

      • Filling Pipe Joint Ring: 100% replacement recommended.
      • Ma Hole Cover Sealing Ring: 100% replacement.

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    CnW Maintenance Manual 500-504 PDF

    Description

    This quiz covers essential items that need to be replaced during the Periodic Overhaul (POH) and Routine Overhaul (ROH) of freight stock. Familiarize yourself with the specific items and their reasons for replacement, which are critical to maintaining safety and efficiency. Test your knowledge on the maintenance requirements and practices in freight operations.

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