Cummins Onan 0309-0717 OEM 1 PSI Normally Closed Pressure Switch, 1/8-27 NPT

Description

The Cummins Onan 0309-0717 is a genuine OEM cummins onan 0309-0717 pressure switch for select compatible generator applications. This cummins onan 0309-0717 pressure switch features a 1 PSI actuation point, normally closed contacts, and a 1/8-27 NPT threaded connection.

If you are looking for a cummins onan pressure switch for your generator, this genuine OEM unit delivers the exact 1 PSI, normally closed specification required by compatible Cummins Onan units. Whether you need a cummins onan 1 psi pressure switch or a cummins onan normally closed pressure switch, this factory component matches the original design.

cummins onan 0309-0717 pressure switch — Product Specifications

Part Number Cross-Reference

This genuine cummins onan 0309-0717 pressure switch replaces or cross-references the following part numbers:

• Cummins Onan 0309-0717 (current part number)
• Cummins Onan 309-0717 (alternate format)
• 83391 (cross-reference number)
• 83391-1-01 (cross-reference number)

If you are searching for a cummins onan 309-0717 pressure switch, cummins onan 83391 pressure switch, or cummins onan 83391-1-01 pressure switch, this genuine OEM 0309-0717 is the correct factory replacement. The 83391 and 83391-1-01 references are cross-reference numbers, not complete generator model numbers. Always verify that this cummins onan generator pressure switch matches your specific application before installation.

Compatible Applications

This cummins onan 0309-0717 pressure switch is designed for select Cummins Onan generator applications requiring a 1 psi pressure switch cummins specification with normally closed contacts. Compatibility depends on the generator model, specification letter, serial number, control circuit, and required switch configuration.

Important: Do not install this cummins onan oem pressure switch without confirming your generator’s exact model number, specification letter, serial number, and control circuit. If you need help confirming fitment, contact our support team with your generator details.

Installation Notes

Before installing this cummins onan 0309-0717 pressure switch, disable automatic startup, disconnect the battery, and allow the equipment to cool completely.

Installation: Use the thread-sealing and tightening procedure specified in the applicable service manual. The 1/8-27 NPT tapered pipe threads can damage the mounting port if overtightened. Install the cummins onan pressure switch according to the manufacturer’s specified torque.

After Installation: Test the generator’s pressure monitoring system according to the manufacturer’s instructions before returning the unit to automatic operation. Confirm the cummins onan normally closed pressure switch responds correctly to pressure changes.

Always verify your generator’s complete model number, specification letter, serial number, control circuit, and required switch configuration before ordering.

OEM vs Aftermarket

This genuine cummins onan 0309-0717 pressure switch is a factory OEM component, not an aftermarket alternative. All specifications match Cummins Onan’s original design for select generator applications. If you need other generator control components, maintenance kits, or oil filters, browse our full catalog of Cummins Onan parts.

Frequently Asked Questions

Q: Will this cummins onan 0309-0717 pressure switch fit my generator?
A: This cummins onan 0309-0717 pressure switch is designed for select Cummins Onan generator applications only. Compatibility depends on your exact model number, specification letter, serial number, control circuit, and required switch configuration. Verify all application information before ordering. If you’re unsure, contact our support team with your generator details.

Q: What’s the difference between 0309-0717 and 309-0717?
A: The cummins onan 0309-0717 pressure switch and 309-0717 are the same part with two common numbering formats. The leading zero is sometimes omitted in parts databases. Both refer to the identical 1 PSI, normally closed, 1/8-27 NPT pressure switch.

Q: Is this a genuine Cummins Onan part or aftermarket?
A: This is a genuine Cummins Onan OEM cummins onan pressure switch. It is not an aftermarket replacement. All components carry the Cummins Onan factory specification.

Q: What does normally closed mean for this pressure switch?
A: This cummins onan 0309-0717 pressure switch is a normally closed (NC) switch. This means the electrical circuit is closed when pressure is below 1 PSI. When pressure rises above 1 PSI, the switch opens and the circuit breaks. This configuration is standard for many cummins onan generator pressure switch applications.

Q: Can I install this cummins onan pressure switch myself?
A: Installation of this cummins onan 0309-0717 pressure switch requires mechanical knowledge and proper tools. The 1/8-27 NPT tapered pipe threads can damage the mounting port if overtightened. Use the thread-sealing and tightening procedure specified in your service manual. If you are not comfortable performing this service, contact a qualified generator technician.