P40 Pump Parts Breakdown: Diagram, PDF & Replacement Help

The Comet P40 is a semi-hydraulic, 3-diaphragm pump designed for applications including soft washing, agricultural spraying, lawn care, and pest-control work. The P40 Series is rated up to 11 GPM, 300 PSI, and 550 RPM, with versions available using either Buna or Desmopan diaphragms.

This page provides the parts breakdown for the updated Comet P40 pump so you can identify components, match diagram positions to part numbers, and find the correct replacement parts for service or repair.

Download the P40 Parts Breakdown

Use the PDF below to view the complete exploded parts diagram and reference the corresponding part numbers.

Click here to download the P40 Parts Breakdown PDF

The Comet breakdown includes major service components such as the pump crankcase, oil cup assembly, bearings, manifolds, fittings, valves, mounting hardware, and other internal pump components. Comet

P40 Pump Specifications

• 3-diaphragm design
• Maximum flow: 11 GPM
• Maximum pressure: 300 PSI
• Maximum speed: 550 RPM
• Maximum power requirement: 2.3 HP
• Oil capacity: 30.4 fl oz
• 1-inch inlet
• 3/4-inch outlet on standard models
• Available with Buna or Desmopan diaphragms

Common P40 Service Parts

Comet lists several replacement and service components for the P40 Series, including rebuild kits, regulators, fittings, collectors, and oil. Depending on the exact P40 model, available components include Buna and Desmopan rebuild kits as well as regulator and retrofit options.

Because P40 versions can differ by diaphragm material and regulator configuration, it is important to verify the exact pump model and part number before ordering replacement components.

Need Help Identifying a P40 Part?

If you do not see the part you need listed on our website, contact Manatee Pressure Washer Supply & Repair at sales@mpwsr.com or call us at 941-216-3710. Send us the pump model, part number, or a clear photo of the component you are trying to replace, and we can help identify the correct part and check availability.

For the fastest assistance, reference the position number from the P40 parts diagram when contacting us.

If there are any parts that we do not have listed on our website please give us a call to find out if we can order them for you.