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Kirby Morgan 525-311 Side Block Rebuild Kit

SKU: 525-311 Rate this product

Availability: 31 In Stock

Restrictions / Notifications

  • Reseller Restriction
    Due to vendor restrictions, this item cannot be sold to a reseller. If you are a reseller, please call us at 760-208-6500 or email for more details.

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The Kirby Morgan 525-311 Side Block Rebuild Kit includes:


310-003 O-Ring 1
510-010 O-Ring 2
510-011 O-Ring 1
510-012 O-Ring 1
510-015 O-Ring 1
510-762 Airtrain Gasket 1
520-016 Control Knob 1
520-024 Packing 1
520-029 Packing (pre '94) 1
520-030 Washer 1
520-031 Washer 1
520-033 Teflon O-Ring 1
525-330 One-way Valve Kit 1
540-095 Packing Washer 1
550-023 Seat Assembly 1
550-034 Washer (pre '94) 1



The Kirby Morgan 525-311 Side Block Rebuild Kit for all Kirby Morgan Dive Helmets.

The side block on your helmet or mask should be serviced regularly to ensure reliable operation. The side block should be periodically disassembled and lubricated with silicone grease. At a minimum we suggest you service the side valve at least once a year, or every 400 operating hours, whichever occurs first.

Tools required:

  1. 9/16 inch Open End
  2. Torque Wrench Attachment
  3. 13/16 inch Open End
  4. Torque Wrench Attachment
  5. 11/16 inch Open End
  6. Torque Wrench Attachment
  7. O-ring Removal Tool
  8. Torque Wrench

For detailed directions on installing this kit\, please refer to our Attachements tab where there is an instruction PDF available for download.

Please see the Overview tab to see the components of the kit.


Additional Information

Brand Kirby Morgan
Video No

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