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Dayton pump repair kit in plastic bag with assorted hardware components

Dayton

Dayton 21TH29 Repair Kit for 2ZXK6 2ZXK7 Pumps

SKU CH-8VWD-XMYAT

Repair kit with Viton gaskets, mechanical seal, impeller and hardware for Dayton 2ZXK6 and 2ZXK7 straight centrifugal pumps

  • Restores pump performance with complete repair kit
  • Ensures chemical resistance using Viton gasket material
  • Maintains secure assembly with included hex head cap screws
  • Prevents fluid leakage via mechanical seal and O-ring
  • Fits Dayton 2ZXK6 and 2ZXK7 models directly

Repair Kit for Dayton 2ZXK6 and 2ZXK7

This Dayton 21TH29 repair kit provides the replacement parts needed to service straight centrifugal pumps bearing model numbers 2ZXK6 and 2ZXK7. It contains a mechanical seal, an impeller, Viton gaskets, an impeller shim kit, a low crown acorn nut, a 5/8 in slinger washer, an O-ring, lock washers, and two sets of hex head cap screws. The kit is designed to restore pump function using components matched to those specific models.

For maintenance teams servicing compatible Dayton

The kit suits technicians who are rebuilding or resealing a Dayton 2ZXK6 or 2ZXK7 straight centrifugal pump and require the correct seal, impeller, and hardware in one package. It is not for operators working on pumps of a different brand, a different Dayton model, or a different pump type, as the included parts are dimensioned only for the two listed models. Buyers needing a complete pump assembly or parts for other equipment should look elsewhere.

Straightforward parts replacement for trained

Installation involves disassembling the pump, removing the worn seal and impeller, and fitting the new Viton mechanical seal, impeller, shims, and supplied fasteners. The process requires standard hand tools and familiarity with centrifugal pump reassembly. Common issues include misaligning the mechanical seal faces, using incorrect shim thickness which affects impeller clearance, or damaging the Viton O-ring during seating. Proper torque on the cap screws and acorn nut is essential to prevent leaks.

Highlights

  • Restores pump performance with complete repair kit
  • Ensures chemical resistance using Viton gasket material
  • Maintains secure assembly with included hex head cap screws
  • Prevents fluid leakage via mechanical seal and O-ring
  • Fits Dayton 2ZXK6 and 2ZXK7 models directly

Specifications

BrandDAYTON

Questions about this item

Which Dayton pump models must I already own for the 21TH29 kit to fit?

The kit fits Dayton straight centrifugal pumps with manufacturer model numbers 2ZXK6 and 2ZXK7, matching Grainger part numbers 2ZXK6 and 2ZXK7.

Will the Viton gasket and mechanical seal in this kit work with an older 2ZXK6 pump that still has its original elastomers?

Yes, the included Viton gasket and mechanical seal are direct replacements for the original elastomers on both 2ZXK6 and 2ZXK7 pumps.

After installing the impeller, shim kit and low crown acorn nut, how can I confirm the repair is correct?

The pump should run without leakage at the mechanical seal, turn freely with no binding, and deliver rated flow and pressure for the 2ZXK6 or 2ZXK7 model.

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