PZ-7 (PZG) Mud Pump Parts: Module and Supplier Reference Guide

PZ-7 mud pump parts enquiries should begin with the PZG model designation and the issuer of the part reference. Gardner Denver’s model literature explicitly pairs PZ-7 with PZG. That model name identifies the pump; it does not identify an individual cylinder, valve cover or stud.

The aftermarket catalogue reviewed here uses a separate GM- numbering system for a shared PZ-7, 8, 9 fluid-end group. Those entries can help describe a requested component, but their catalogue prefix must remain visible.

Model and specification reference

Choose the correct module scope before comparing references

The catalogue distinguishes a complete fluid cylinder, a studded fluid cylinder, a modified cylinder and a stud-and-nut set. These descriptions refer to different supply scopes. Confirm which covers, studs, valves, seals or other items are included rather than assuming that every module number describes the same complete assembly.

The -M suffix on GM-205PZL029D-M denotes a separately listed modified cylinder. Retain that suffix and obtain the applicable dimensions and drawing when comparing it with GM-205PZL029D.

Do not turn a supplier number into an OEM cross-reference

Removing GM- from a catalogue entry does not verify an original Gardner Denver part number. A similar sequence of characters in another list may describe a different revision or package. Request the relevant drawing, dimensions and model-specific applicability before accepting a proposed replacement.

The manufacturer cutsheet’s power and stroke values identify this PZG model. They are not derived from the PZ-8 manual and do not define the working pressure of every installed liner or fluid end.

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-7. Keep the GM- prefix when referring to this catalogue.

Prepare a model-specific parts enquiry

• Send the complete PZ-7 (PZG) 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.
• PZG-CUT: Gardner Denver PZG (PZ-7) manufacturer-branded cutsheet.

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.