Armstrong New Style Model 4030 M-8 Rebuild Kit



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Rebuild kit for Armstrong model 4030 new style medium frame circulating pump with 8" impeller casing.

Kit for center discharge line location. Will not fit pump with discharge line located off to one side.

Parts included in kit are:

Body gasket

Inboard and outboard sealed ball bearing

Steel shaft and sleeve

Mechanical seal

Bearing locknut

Bearing lock washer

Impeller washer

Impeller bolt


Models using

Models using this kit are:

4030 3x1.5x8 with 30 HP and larger motor

4030 3x2x8 with 30 HP and larger motor

4030 3x2.5x8, 4030 4x3x8, 4030 5x4x8, 4030 6x4x8 with 3500 RPM motor 20 HP and larger

4030 3x2.5x8, 4030 4x3x8, 4030 5x4x8, 4030 6x4x8 with 1750 RPM motor 15 HP and larger

4030 3x2.5x8, 4030 4x3x8, 4030 5x4x8, 4030 6x4x8 with 1150 RPM motor 7.5 HP and larger

4030 8x8x8 with 3500 RPM motor 10 HP and larger

4030 8x8x8 with 1750 RPM motor 7.5 HP and larger

4030 8x8x8 with 1150 RPM motor 3 HP and larger

Genuine Armstrong pump parts

Shipping rate for continental United States



  • Model: 4030M-8
  • Manufactured by: Armstrong Parts
  • UPC:

Manufacturer Info

About Us

Welcome to Shortys HVAC Supplies. We are located on the South West side of Indianapolis, IN. Our purpose is to provide Original Equipment Manufacturer parts for the repair and maintenance upkeep of furnaces, air conditioners, ventilation systems and pumps to the general public as well as contractors and commercial building maintenance staff.

We sell brand new OEM parts for most manufacturers such as Carrier, Bryant, Payne, Lennox, Armstrong Aire, Ducane, Trane, American Standard, Heil, Tempstar, Nordyne, Goodman, Rheem, Ruud, York, Coleman, Modine, Reznor, Armstrong Pumps, Bell and Gossett pumps, Weil McLain, Lochinvar, McDonnell Miller, Hoffman Specialties, Manitowoc, Scottsman and we strive to make sure you get the correct part for your application.

Give us a call with the information from your equipment nameplate and we will do our best to help. We can be reached at our local phone number 317-821-8770, Toll Free 877-821-8770 or by fax at 317-821-8772. Our physical address is 7720 S Mooresville Rd in West Newton , IN 46183. Business hours are 8-5 EST M-F. Prior to making repairs please consult your manufacturers instructions and follow all safety precautions. Improper repairs can lead to equipment damage or personal injury or death. If you are unsure of your ability please call a professional company.

Refunds And Returns

Items that are returned must be in original package and in new condition. We are not responsible for return shipping. They must be returned within 30 days of the purchase date. Any returns after 30 days will not be accepted. Refunds takes 4-7 days to be processed and appear back on the card used. A 25% restocking charge will be deducted from the original purchase price. If an item has been installed or altered in any way no refund will be processed. If you receive an item that is damaged please let us know ASAP so we can assist you.
Shipping Rate For Continental US Only. Please contact us for rates to Canada before ordering.




Company Name

Shortys HVAC Supplies LLC


7720 S Mooresville RD
West Newton, IN
USA 46183

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Shortys HVAC Supplies LLC 2024