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6L8617 Cap for CAT Equipment
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Description for 6L8617 Coolant Pressure Cap
â–¶Specification for 6L8617 Coolant Pressure Cap
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My part was damaged in shipping and everyone was very helpful on get it resolved and sent me another free of charge.
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Product Questions
Frequently Asked Questions
What is the 6L8617 cap used for in Caterpillar equipment?
The 6L8617 cap is a cooling system component designed to seal the radiator or expansion tank in Caterpillar machinery. It helps maintain proper pressure within the cooling system, which supports consistent engine temperature control and prevents coolant leakage during operation. Maintaining the correct pressure is important for efficient heat management and reliable equipment performance.
How does the 6L8617 radiator cap help maintain engine cooling?
The 6L8617 radiator cap replacement regulates cooling system pressure, typically rated around 7 PSI, which helps keep coolant circulating efficiently through the engine and radiator. By maintaining proper pressure, the cap supports stable engine temperature, improves cooling system efficiency, and helps reduce the risk of overheating in heavy-duty equipment.
Which Caterpillar machines are compatible with the 6L8617 cap?
The 6L8617 cap replacement is used across a wide range of Caterpillar equipment, including motor graders, track-type tractors, loaders, excavators, and diesel engines. Compatible models may include machines such as 120G, 120H, 140G, 140H, 160H, 12G, 12H, and engines like 3304, 3306, and 3406, among others. Always confirm compatibility with your equipment manual or parts catalog before ordering.
What are the signs of a faulty radiator cap?
A worn or damaged 6L8617 cooling system cap may cause several cooling system issues, including:
- Coolant leaks around the radiator or expansion tank
- Engine overheating during operation
- Loss of cooling system pressure
- Visible corrosion or worn seals on the cap
If you notice any of these warning signs, replacing the 6L8617 as soon as possible helps prevent larger failures and unplanned downtime.
Does the 6L8617 cap meet performance standards?
Yes. The 6L8617 cap replacement is designed to meet OEM specifications for fit, pressure control, and durability in heavy equipment cooling systems. When replacing cooling components, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications to maintain proper system performance and equipment reliability.
How do you install a 6L8617 radiator cap?
Installing the 6L8617 cap is typically a simple maintenance task:
- Ensure the engine is turned off and completely cooled.
- Carefully remove the existing radiator or expansion tank cap.
- Inspect the sealing surface and clean it if necessary.
- Position the new 6L8617 cap on the radiator neck.
- Press down and twist securely until the cap locks into place.
Always follow your equipment service manual for proper cooling system maintenance procedures.
Can I use a premium aftermarket 6L8617 cap replacement?
Yes — high-quality aftermarket 6L8617 replacements are widely used and can deliver the same performance as original parts when manufactured to OEM specifications. A reliable replacement keeps the system protected and equipment running as expected.
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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.
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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.
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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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