Caterpillar Auxiliary Sea Water Pumps & Part Numbers
September 3, 2026
- Caterpillar Marine Engines With Auxiliary Sea Water Pumps: C18, C32, 3508, 3512, 3516 & C280
- Caterpillar C32
- Caterpillar Marine Engine Parts
- Request a Quote
- What Is an Auxiliary Sea Water Pump?
- Can a Marine Engine Use More Than One Sea Water Pump?
- Multiple pump part numbers do not automatically mean two pumps are installed on the same engine.
- Caterpillar Marine Engines With Auxiliary Sea Water Pump Applications
- Caterpillar C18
- Caterpillar C32B
- Caterpillar 3508
- Caterpillar 3508B
- Caterpillar 3508C
- Caterpillar 3512
- Caterpillar 3512B
- Caterpillar 3512C
- Caterpillar 3516
- Caterpillar 3516B
- Caterpillar 3516C
- Caterpillar 3612
- Caterpillar 3616
- Caterpillar C280-6
- Caterpillar C280-8
- Caterpillar C280-12
- Caterpillar C280-16
- Important Compatibility Note
- Caterpillar Auxiliary Sea Water Pump Part Numbers
- Caterpillar C18 Auxiliary Sea Water Pump
- Caterpillar C18 Marine Engine
- Caterpillar 308-2632 / 3082632
- Do not assume every Caterpillar C18 uses 308-2632.
- Caterpillar C32 Auxiliary Sea Water Pumps
- Caterpillar C32 Marine Engine
- Caterpillar 436-1239 / 4361239
- 30R-1359 / 30R1359
- 436-1239 / 4361239 → 30R-1359 / 30R1359 Reman
- Caterpillar 436-1239 Sea Water Auxiliary Pump & 30R-1359 Reman
- Caterpillar 584-2156 Auxiliary Sea Water Pump
- Caterpillar 584-2156 / 5842156
- 30R-1362 / 30R1362
- 584-2156 / 5842156 → 30R-1362 / 30R1362 Reman
- Are Caterpillar 436-1239 and 584-2156 the Same Pump?
- Why Does the Caterpillar C32 Have Different Auxiliary Sea Water Pumps?
- “C32 sea water pump”
- “C32, ESN XXXXXXXX, arrangement XXXXXXX, existing pump 436-1239.”
- Does a Caterpillar C32 Use Two Auxiliary Sea Water Pumps?
- Multiple C32 pump part numbers do not prove that every C32 uses two pumps simultaneously.
- Caterpillar 3508 Auxiliary Sea Water Pump
- Caterpillar 3500 Series
- Caterpillar 248-2858 / 2482858
- Caterpillar 30R-1360 / 30R1360
- 248-2858 / 2482858 → 30R-1360 / 30R1360 Reman
- Caterpillar 3512 Auxiliary Sea Water Pump
- Caterpillar 3512 Marine Engine
- 248-2858 / 2482858 Auxiliary Sea Water Pump
- 30R-1360 / 30R1360
- Caterpillar 3500 Series engines
- Caterpillar 3516 Auxiliary Sea Water Pump
- Caterpillar 3516 Marine Engine
- 30R-1360 / 30R1360 Reman
- Does 248-2858 Fit Every Caterpillar 3508, 3512 and 3516?
- Caterpillar 3500 Marine Engine Maintenance Schedule
- Caterpillar 3612 & 3616 Auxiliary Sea Water Pumps
- Caterpillar 3600 Series
- Caterpillar 473-0553 / 4730553
- Caterpillar 3600 Marine Engine Parts
- Caterpillar C280 Auxiliary Sea Water Pumps
- Caterpillar C280 family
- Caterpillar 473-0551 / 4730551
- Caterpillar 473-0553 on C280 Engines
- 473-0553 / 4730553 Auxiliary Sea Water Pump
- This does not prove that both pumps are installed simultaneously on every C280-12 or C280-16.
- Caterpillar Auxiliary Sea Water Pump & Reman Comparison
- Important
- New vs Reman Caterpillar Auxiliary Sea Water Pumps
- Caterpillar 436-1239 Sea Water Pump & 30R-1359 Reman
- Verify both the original pump and the proposed Reman replacement against the exact engine application.
- Why You Should Never Order a Caterpillar Sea Water Pump by Engine Model Alone
- “Caterpillar C32 auxiliary sea water pump”
- Check the Existing Pump Part Number First
- Why the Engine Serial Number Matters
- “Need C32 auxiliary sea water pump”
- What Happens When an Auxiliary Sea Water Pump Starts Failing?
- Why Marine Sea Water Pumps Require Special Attention
- Corrosion
- Seal Wear
- Bearing Wear
- Impeller Damage
- Debris & Marine Growth
- Cavitation
- Auxiliary Sea Water Pump vs Main Sea Water Pump
- Does Having Two Sea Water Pumps Mean One Is a Backup?
- Can Two Different Sea Water Pumps Be Installed on the Same Engine?
- Repair or Replace a Caterpillar Auxiliary Sea Water Pump?
- Which Caterpillar Marine Engines Should Be Checked Carefully?
- What Information Should You Send for a Caterpillar Sea Water Pump?
- Frequently Asked Questions About Caterpillar Auxiliary Sea Water Pumps
- Does every Caterpillar C32 use the same auxiliary sea water pump?
- Is Caterpillar 436-1239 a C32 auxiliary sea water pump?
- Caterpillar 436-1239 / 30R-1359 Sea Water Pump
- What Is the Reman Number for Caterpillar 436-1239?
- 436-1239 / 4361239 → 30R-1359 / 30R1359
- Is Caterpillar 584-2156 Used on C32 Marine Engines?
- What Is the Reman Number for Caterpillar 584-2156?
- 584-2156 / 5842156 → 30R-1362 / 30R1362
- Does a Caterpillar C32 Have Two Auxiliary Sea Water Pumps?
- Which Auxiliary Sea Water Pump Is Associated With Caterpillar C18?
- Which Caterpillar Marine Engines Use 248-2858?
- What Is the Reman Alternative for Caterpillar 248-2858?
- 248-2858 / 2482858 → 30R-1360 / 30R1360
- Which Engines Use Caterpillar 473-0551?
- Which Marine Engines Use Caterpillar 473-0553?
- Does Caterpillar 3608 Use 473-0553 as a Marine-Engine Pump?
- Can I Identify the Correct Sea Water Pump From a Photograph?
- Can Two Caterpillar Sea Water Pumps Look the Same but Have Different Part Numbers?
- Do Caterpillar Auxiliary Sea Water Pumps Have Reman Options?
- 436-1239 / 4361239 → 30R-1359 / 30R1359
- Caterpillar Marine Cooling Parts & Sea Water Pumps
- Marine Engine Spare Parts
- Request Caterpillar Auxiliary Sea Water Pump Parts
- Caterpillar 3612 or 3616
- Caterpillar C280
- request@alfamarinespareparts.com
- Worldwide parts supply for yachts, fishing vessels, workboats, tugboats, offshore vessels, commercial ships, marinas, shipyards, marine engineers and repair companies.