New Water Pump 178-6633 1786633 Engine 3066 Fits for CAT Excavator 320 312 321 323
New Water Pump 178-6633 1786633 Engine 3066 Fits for CAT Excavator 320 312 321 323 is backordered and will ship as soon as it is back in stock.
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Powering 10,000+ Commercial Fleets
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One Year Warranty
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Easy 60-day Return
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Expert support & Fitment Guarantee
Description
Description
New Water Pump 178-6633 1786633 Engine 3066 — Fits CAT Excavator 320 312 321 323
This new aftermarket water pump is designed for efficient cooling in CAT excavators. It replaces the original 178-6633 and 1786633 parts, compatible with engine model 3066. The package includes one unit, ensuring a reliable fit for various CAT excavator models.
Part Details
- Condition: New, Aftermarket Replacement
- Quantity: 1
- Warranty: 6 months
- Engine Number: 3064, 3066, C4.2, C6, C6.4
Compatible Part Numbers
- 178-6633
- 1786633
Compatible Engines
- 3064
- 3066
- C4.2
- C6
- C6.4
Compatible Equipment
- Caterpillar Excavator 311C, 311D
- 312C, 312C L, 312D, 312D L
- 313D
- 314C, 314D CR, 314D LCR
- 315D L
- 318C, 318D L
- 319C, 319D, 319D L, 319D LN
- 320C, 320C FM, 320C L
- 320D, 320D FM, 320D FM RR, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR
- 321C, 321D LCR
- 323D L, 323D LN, 323D SA
- MOBILE HYD POWER UNIT 323D L, 323D LN
1 Year Warranty
1 Year Warranty
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Fast Delivery
Fast Delivery
Estimated delivery time 3-6 workdays
No Core Charge
No Core Charge
We don't have a core charge for any products.
About This Item
- Direct OEM replacement — verified cross-reference fitment for New Water Pump 178-6633 1786633 Engine 3066 Fits for CAT Excavator 320 312 321 323
- Precision-cast aluminum housing for long-service durability under continuous load
- High-flow impeller design delivers optimal coolant circulation, preventing overheating
- Pressure-tested to OEM specifications before shipment — zero-defect guarantee
- Drop-in replacement — no modifications, adapters, or re-engineering required
- Reinforced bearing seats extend service life beyond standard aftermarket alternatives
- Compatible with standard coolant types — no special fluids required
- Backed by a 1-year manufacturer warranty covering defects in materials and workmanship
Superior Cooling Efficiency
Our precision-engineered impeller delivers higher flow rates than OEM specifications, ensuring optimal cooling performance even under extreme operating conditions — ideal for high-cycle heavy equipment applications.
Built for Long-Service Durability
Constructed from premium cast aluminum with reinforced bearing housings, this pump withstands thousands of operating hours with minimal wear. Pressure-tested to 2.5× OEM spec before shipment — no surprises in the field.
Precision Fitment — Zero Modifications
Every pump is manufactured to exact OEM tolerances with zero-clearance mounting. Drop-in replacement — no adapters, no re-engineering, no downtime surprises.
How We Compare
| Specification | FAB Heavy Parts | OEM Original | Generic Aftermarket |
|---|---|---|---|
| Flow Rate | OEM+ (Higher Flow) | OEM Spec | Below OEM |
| Warranty | 1 Year | 1 Year | 90 Days or None |
| Fitment Accuracy | Exact OEM Tolerances | Exact OEM Tolerances | Approximate |
| Pressure Tested | ✓ Pre-shipment | ✓ Yes | ✗ Rarely |
| Price Tier | Mid-range | Premium | Budget |
Frequently Asked Questions
How do I confirm this fits my engine?
How difficult is installation?
What warranty is included?
What is your return policy?
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Can I order in bulk for my fleet?
What Our Customers Say
"Exact fit, no modifications needed. Installed in under an hour and the engine runs cooler than ever."
"Better quality than the OEM part we replaced. Pump has been running strong for 6 months with zero issues."
"Fast shipping, well-packaged, and the fitment was spot-on. Will order again for our other units."
"Ordered 3 units for our fleet. All installed without issues. Great value compared to OEM pricing."
