PZ-9 (PZJ) Mud Pump Parts: Gasket and Valve-Guide References

PZ-9 mud pump parts should be matched to the complete PZJ designation, serial details and installed assembly. The manufacturer’s historical brochure explicitly pairs PZJ with PZ-9 and lists a 9-inch stroke. These specifications are sourced independently of the PZH / PZ-8 manual.

For valve-guide, wear-plate and gasket enquiries, the reviewed Grizzly catalogue provides a shared PZ-7, 8, 9 fluid-end group. Its GM- codes are supplier references to identify catalogue entries, not confirmed original-manufacturer part numbers for a particular PZJ serial number.

Model and specification reference

Separate the valve-guide assembly from its individual parts

The catalogue lists GM-2011706 as a valve-guide assembly, and separately lists the retainer plate, suction guide, bushing, lock washer and screw. State whether the requirement is for a complete assembly or only a worn component. A component list from another supplier must be checked against the original drawing and dimensions.

Identify the gasket by its location

A valve-cover gasket, liner wear-plate gasket, suction-manifold gasket and discharge-manifold gasket seal different interfaces. Include the gasket location and mating photographs with the supplier reference. The wear-plate assembly GM-M1158A is also distinct from the gasket GM-M1158 and plate GM-G001S19.

The catalogue groups models together and includes a separately named GM-PZ8GSKTSET. That package name is not adequate evidence of a PZ-9-specific gasket kit, so this guide does not present it as one. Specify each required gasket and confirm the set contents for the installed PZJ fluid end.

Check proposed cross-references instead of stripping prefixes

Keep GM- attached when referring to the Grizzly list. Removing it or matching a similar number from the PZH manual does not establish OEM identity or interchangeability. The brochure specifications below describe the PZJ model historically; they are not a performance guarantee for a replacement part or a rebuilt pump.

Aftermarket catalogue references to check

The source lists these entries under its shared PZ-7, 8, 9 fluid-end group. They remain Grizzly supplier references, not verified original-manufacturer MPNs or proof of fit on an individual PZ-9. Keep the GM- prefix when referring to this catalogue.

Prepare a model-specific parts enquiry

• Send the complete PZ-9 (PZJ) nameplate designation, serial number and year.
• Identify the catalogue issuer and provide its exact part reference, page and item number.
• For a fluid end, include cylinder photographs, installed liner bore, valve-cover style, manifold interfaces and seal dimensions.
• State whether the request is for a bare part, modified component, studded module or complete assembly, and list quantities separately.
• Include delivery destination and photographs of the mating components.

Use our mud pump spare parts enquiry page to provide these details. Replacement suitability and availability require confirmation for the actual pump; this guide does not establish an original-manufacturer authorisation or genuine-parts supply claim.

Source references

• GM: Grizzly aftermarket catalogue, PZ-7, 8, 9 fluid-end module and accessories.
• GD2009: Gardner Denver drilling-pump brochure, 1859-2009 anniversary edition, model table on PDF page 4.

Page numbers in the tables are PDF file pages counted from 1, rather than the printed page label. Historical catalogue entries are identification references, not current stock or compatibility guarantees.

Mud King catalogue references for this model

The reference list also includes entries from the Mud King Products expendables catalogue. MK and MKG prefixes identify that supplier catalogue’s numbering. Keep those prefixes and the stated size, valve series, liner outside diameter and source table together. They are not presented as original pump-manufacturer numbers or as a confirmation of fit.