New 3T9561 Glow Plug Replacement suitable for Caterpillar Equipment
- New Glow Plug Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 3T9561 Glow Plug
â–¶Specification for 3T9561 Glow Plug
â–¶Exact Fit Guarantee for 3T9561 Glow Plug
â–¶| Models | D330C, D333C, 3304, 3306 |
|---|---|
| Dimensions | 4.72x0.39x0.39 |
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I was able to source my parts with propelparts in one click pay and have the shipment worked on under 60 minutes, with various options of couriers i received my shipments in less than 10days
The parts a durable and efficient -
Helpful with making sure parts fit my machine
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Propel Parts provided quality parts for my Caterpillar needs at a very fair price. Shipping to my international location was very fast. took about a week for the parts to get here. Seller is also responsive with my inquiry.
Thanks again -
customer service and parts availability is fantastic
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Great service!
Frequently Asked Questions
What is the 3T9561 plug used for?
The 3T9561 plug seals an opening or heats/ignites as its design requires, keeping the system closed or supporting combustion. Its correct function protects the assembly.
How do I install the 3T9561 plug?
A reliable installation of the 3T9561 starts with inspection and ends with verification. Follow this process:
- Shut off and cool the engine, then disconnect power if electrical
- Remove the old plug and clean the threads and seat
- Inspect the bore and threads for damage
- Thread the 3T9561 in by hand, then torque to specification
- Reconnect any wiring and test for correct operation
Which Caterpillar machines is the 3T9561 compatible with?
The 3T9561 is matched to particular Caterpillar equipment, so always verify the application against your parts reference before purchasing. Or reach out to Propel Parts for help verifying fitment.
Does the 3T9561 plug meet performance standards?
Yes. Propel Parts supplies the 3T9561 as a premium aftermarket part made to meet OEM specifications. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications so you can fit it with confidence.
How often should the 3T9561 be replaced?
Replace the 3T9561 whenever the assembly it serves is overhauled, or any time it shows wear, damage, or corrosion. Following the intervals in your service manual is the best guide.
What are the signs of a worn or failing 3T9561 plug?
Catching a failing 3T9561 early prevents wider damage. The common warning signs include:
- Leaks or loss of pressure at the plug
- Hard starting or rough running (for heating/ignition types)
- Corroded or damaged threads
- Warning indicators related to the circuit
Why is the 3T9561 important, and what related parts work with it?
Keeping the 3T9561 in good condition protects the components around it and supports smooth, reliable operation. Maintaining the assembly with parts that meet OEM specifications helps you avoid unplanned downtime. Related hardware on our site includes 6V5597 Seal and 1337068 Gasket Ctp.
This 3T9561 Glow Plug is compatible with the following models:
D330C, D333C, 3304, 3306 & more...

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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