Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Blackmer · Hydraulics
331880
In stock · ships from Knoxville
This is a complete mechanical seal assembly for Blackmer TX3, GX3, and X3 series sliding vane pumps.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 9 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
2 seals required per pump. Verify O-ring material (Buna-N or Viton) for your application.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 2 of 2.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It replaces the seal to prevent fluid leakage around the pump shaft. The assembly includes a cast iron stationary seat, a carbon seal face, and elastomer O-rings (typically Buna-N). Two seals are required per pump, and replacement is needed when the existing seal wears out or leaks.
Part Number: 331880
TX3 MECHANICAL SEAL ASSY
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more