New 4W4011 (1209453) Regulator Replacement suitable for Caterpillar Equipment
- New Regulator Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 4W4011 Water Temperature Regulator
â–¶Specification for 4W4011 Water Temperature Regulator
â–¶Exact Fit Guarantee for 4W4011 Water Temperature Regulator
â–¶| Models | 3608, C27, C32 |
|---|---|
| Dimensions | 2.76x2.76x3.54 |
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Grateful I found this company!
I’m grateful I found this company! They answer the phone every time plus the parts are packaged very well!! Even the angriest mailman couldn’t damage your parts! lol The parts showed up as planned and for being aftermarket the quality seems to be good!! The warranty is the same as CAT. Thank you Daniel!!! -
The best supplier ever we mainly deal with most rare needed parts .. i highly recommend .. they are very very honest
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Customer Service.
I recently had to cancel an order with Propel Parts, and I was thoroughly impressed by the prompt and efficient service I received. Steven handled my request with professionalism and speed, ensuring a hassle-free process. I've purchased parts from Propel Parts before and have never been disappointed. Their consistent reliability and excellent customer service keep me coming back. -
La mejor experiencia y calidad
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Great service at an affordable price to get my machine back going.
Frequently Asked Questions
What is the Caterpillar Regulator 4W4011?
The 4W4011 is a regulator component used in Caterpillar fuel or hydraulic systems to control and maintain the correct operating pressure within the system. It ensures consistent pressure delivery to downstream components, protecting them from pressure spikes or drops.
Which machines or systems use the 4W4011 regulator?
This regulator is used in specific Caterpillar fuel or hydraulic system configurations. Always verify the correct application with your machine's parts manual. Please reach out to Propel Parts for help verifying fitment.
What are signs the regulator needs replacement?
Symptoms of a failing regulator include:
- Inconsistent system pressure during operation
- Hard starting or rough engine running (fuel pressure)
- Sluggish or erratic hydraulic response
- Fluid leaking from the regulator body
A failed regulator can cause significant downstream damage if not addressed.
What material is the 4W4011 regulator made from?
Fuel and hydraulic regulators are typically machined from brass, aluminum, or steel with internal spring and valve components. The 4W4011 meets or exceeds OEM specifications for pressure rating, flow capacity, and material durability.
Is the 4W4011 a high-quality aftermarket regulator?
Yes. Propel Parts offers the 4W4011 as a premium aftermarket regulator that meets or exceeds OEM specifications for pressure control accuracy and long-term durability in Caterpillar equipment systems.
Browse our complete fuel system parts catalog for Caterpillar equipment, including regulators, injectors, filters, and fuel lines.
How do I install the 4W4011 regulator?
Always depressurize the system before removal. Install new sealing O-rings or gaskets as specified in your service manual. Torque fittings to specification and verify correct pressure after installation using a calibrated gauge.
What other parts should I inspect when replacing the regulator?
When servicing the regulator, also inspect related fuel lines, filters, and sealing O-rings for wear. Replacing all components in the same service area ensures reliable long-term performance.
Find replacement O-rings and seals for your regulator installation in our seals and gaskets section.
This 4W4011 Water Temperature Regulator is compatible with the following models:
3608, C27, C32 & 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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