Spring Replacement in a Merwin & Hulbert 38 S&W Revolver

Published on May 20, 2017
Duration: 9:43

This guide details the process of replacing a missing or defective bolt spring in a Merwin & Hulbert 38 S&W revolver. The procedure involves disassembling the side plate, identifying the faulty spring, removing the trigger guard to access its location, selecting and installing a suitable replacement spring from a general-purpose pack, and then reassembling and testing the firearm. Fine-tuning the spring length may be necessary to achieve correct cylinder lockup and prevent over-rotation.

Quick Summary

Replacing a missing or defective bolt spring in a Merwin & Hulbert 38 S&W revolver involves disassembling the side plate, identifying the spring's location, and selecting a suitable replacement from a general-purpose spring pack. The new spring must be correctly sized and potentially trimmed to ensure proper engagement with the bolt for secure cylinder lockup.

Chapters

  1. 00:04Introduction to Merwin & Hulbert 38 S&W
  2. 00:40Assessing the Revolver's Condition
  3. 01:03Disassembly: Removing Side Plate Screws
  4. 01:40Removing the Side Plate
  5. 01:58Internal Mechanism Overview
  6. 02:02Identifying Sear and Safety Engagement
  7. 02:31Locating the Missing Bolt Spring
  8. 03:07Removing the Trigger Guard
  9. 03:10Selecting a Replacement Spring
  10. 04:02Searching the Wolf Spring Pack
  11. 04:41Choosing the Correct Spring
  12. 05:07Reinstalling the Bolt Spring
  13. 05:35Seating the Spring and Trigger Guard
  14. 06:01Testing Bolt Engagement
  15. 06:31Troubleshooting Over-Rotation
  16. 06:46Adjusting Spring Length
  17. 07:22Second Spring Test and Result
  18. 07:53Merwin & Hulbert Unique Action Explained
  19. 08:20Summary of Internal Mechanisms
  20. 09:03Conclusion and Support

Frequently Asked Questions

What are common issues with older Merwin & Hulbert revolvers?

Older Merwin & Hulbert revolvers, particularly the 38 S&W models, often suffer from missing or defective internal springs. These springs are crucial for mechanisms like the bolt and sear engagement, and their failure can lead to improper cylinder lockup and overall firearm malfunction.

How can I find replacement springs for a Merwin & Hulbert revolver?

General-purpose spring packs, such as those offered by Wolf (e.g., their #3 Blitz pack), are a good resource for finding replacement springs. You'll need to select a spring with the correct diameter and then potentially cut it to the precise length required for proper engagement with the firearm's internal components.

What is the function of the bolt spring in a Merwin & Hulbert revolver?

The bolt spring in a Merwin & Hulbert revolver is essential for the bolt mechanism. It provides the necessary tension to push the bolt upwards, ensuring it engages with the cylinder notches when the hammer is cocked or the trigger is pulled, thereby locking the cylinder securely in place for firing.

What are the unique features of the Merwin & Hulbert revolver's action?

The Merwin & Hulbert revolver features a unique swing-apart action for ejecting spent cases, which is initiated at half-cock. Its internal mechanism also differs from contemporary Colt revolvers, incorporating a double-action system with specific sear and bolt engagement points.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from InRangeTV

View all →