New 3T9561 Glow Plug Replacement suitable for Caterpillar Equipment
- New Glow Plug Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
Exact Fit Guarantee
This part is guaranteed to fit your machine.
Wrong Part?
We'll overnight correct part at no cost to you.
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 |
-
I put 2 of the same orders in due to a web page error and shortly after I was contacted by Deb from customer service asking if I meant to place both orders. She was very helpful, the email was very well written and it genuinely made me feel better about the whole experience. She resolved the issue quickly and with there not being much of customer service these days I was very happy so see that is not the case everywhere!!!
-
I own old cat bulldozers D8k,D8H,D8N that required frequent repairs and servicing. it was erratic and practically cumbersome to keep them running without constant supply of reliable
and affordable spares in Uganda a third world country however,since I started dealing with propel parts US,my bulldozers have earned reliability and efficiency in providing high quality services to clients and making me a great dependable construction company in earth moving.
My shipments are always handled expeditiously and delivered in record time to Uganda this is awesome from Propelparts.
My business is booming by the clock for finding the best partner in Propelparts. -
Great customer services, the best
-
Good Customer Service. Fast Shipping. A+++
-
Very knowledgeable and quick to quote parts.
Very quick to respond to parts quotes. Knowledgeable and Polite, and very quick shipping. Definitely will purchase parts from these guys in the future.
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.
Exact Fit Guarantee®
The right part — or we'll make it right.
Order Normally
Know your part number? Simply place your order.
Not Sure?
Place your order, then send us your serial number before it ships.
We'll verify fit.We Make It Right
Wrong part? We'll make it right.Fast. At our expense.
Worldwide Shipping




