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New 4P3966 Piston & Rod Assy Replacement suitable for Caterpillar Equipment
- New Piston & Rod Assy 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.
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Description for 4P3966 Piston
▶Specification for 4P3966 Piston
▶Exact Fit Guarantee for 4P3966 Piston
▶| Models | 120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14G, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 1673C |
|---|---|
| Dimensions | 9.84x5.12x5.12 |
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Australian buyer, sales where professional and very responsive with secure parts identification.
Highly recommend.
Bedrock Exploration Pty Lt, Australia
Customer Follow-Up After Delivery:
Thank you Deb and your colleague Anthony A for your help in supplying a replacement part which arrived in good time and is running smoothly.
I shall continue to use your services and recommend you to other remote miners, as your services and delivery times are better than our home-based suppliers.
With thanks again.
Regards, Gerard
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Great prices prompt courteous customer service and fast shipping.
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This is a great company to work with. Our sales associate Anthony quickly located the correct part and sent it out right away.
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He was a great help with ordering and refunding the sales tax,
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Excelente atencion y refacciones de calidad
Frequently Asked Questions
What is the function of the 4P3966 piston & rod assembly?
The 4P3966 piston & rod assembly combines a piston and connecting rod into a single unit that moves inside the engine’s cylinder. It plays a key role in converting combustion energy into mechanical motion, helping the engine produce power.
How do I install the 4P3966 piston & rod assembly?
Here’s a general guide for proper installation:
- Turn off the engine and let it cool completely.
- Remove the engine head and other components to access the cylinder.
- Extract the old piston & rod assembly carefully, noting orientation.
- Clean the cylinder bore and crank journal surfaces.
- Position the new 4P3966 assembly in the correct orientation and gently guide the piston into the bore.
- Reassemble the engine components, following torque specs and procedures in your service manual.
- Run the engine to confirm proper operation.
Which engines or machines use the 4P3966 piston & rod assembly?
The 4P3966 piston & rod assembly fits a range of Caterpillar machines with compatible engine configurations. Common models include 120H, 120K, 12H, 140G/H/K, 160H/K, 135H, 143H, 14H, and 1673C where this assembly is specified. If you are still unsure, reach out to Propel Parts, our team will be happy to help you verify if this part fits your equipment.
Does the 4P3966 piston & rod assembly meet performance expectations?
Yes, the 4P3966 piston & rod assembly is built to meet or exceed OEM specifications for fit and durability. Aftermarket versions undergo quality checks to ensure they perform comparably to the original Caterpillar part in strength, balance, and operation.
How often should a piston & rod assembly like the 4P3966 be inspected or replaced?
Piston & rod assemblies are typically inspected during major engine overhauls or when performance issues arise such as loss of compression, excessive vibration, or unusual engine noise. Regular inspection helps catch wear early before more extensive engine damage occurs.
What are common signs that the 4P3966 piston & rod assembly needs replacement?
Typical indicators include:
- Reduced engine performance or compression
- Knocking or piston slap noises from the engine
- Excessive oil consumption or smoke
- Visible wear or scoring on the piston or cylinder wall
Why is using a quality piston & rod assembly important for equipment performance?
A quality piston & rod assembly ensures proper compression, smooth combustion, and efficient engine power delivery. Using components that meet or exceed OEM standards helps reduce risk of premature wear, improve fuel efficiency, and extend overall engine life.
This 4P3966 Piston is compatible with the following models:
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14G, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 1673C & more...
Shipping
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.
Easy Returns
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.
Warranty
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.
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Place your order, then send us your serial number before it ships.
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