National A1700-PT Mud Pump Parts: Fluid-End and Drawing References

The National A1700-PT parts list uses its own drawing and component numbering structure. The supplied catalog identifies a triplex piston pump and separates the fluid end, liner and piston assembly, strainer block, power end, shaft assemblies and lubrication equipment. An A1700-PT parts enquiry should carry those source identifiers rather than rely on the word "National" or a general horsepower description.

Model and source-reference facts

Keep drawing references and commodity numbers separate

The fluid-end drawing is P184-BE1. Its bill of material uses a COMM NO column, with individual references such as 10-300-181 for the studded fluid end and 10-300-184 for the liner wear plate. The drawing reference identifies the illustration; the commodity number identifies the listed component. They should occupy separate fields in an RFQ so that neither is mistaken for the pump model.

The same fluid-end page lists the valve cover, valve-cover gasket, sleeve and sleeve bushing as distinct parts. It also distinguishes a complete valve with a polyurethane disc from one with a Buna N disc. When ordering a valve-related component, record the existing material arrangement and the required assembly contents. A complete valve and a replacement valve disc are different purchasing scopes even when they appear beside one another in the catalog.

The examples below are selected reference entries, not a complete bill of material or a confirmation of interchangeability.

Details to include with the parts request

Supply the A1700-PT nameplate, serial number and catalog issue date with the drawing, item position and original commodity number. Add the required quantity, installed liner or piston size and photographs showing markings and mating features. Preserve the hyphens in the number when copying it into a spreadsheet. If a number is unreadable, send a marked drawing and measurements for review rather than borrow a similar number from a P-series model.

For related purchasing information, see mud pump spare parts matching and liner, piston, valve and seat identification. You can contact Pratt Oil with your parts request for review of the model, reference and component details.

Brand and model names identify the equipment described in the source material. Final parts matching depends on the complete pump and assembly information.

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.