LYCOMING LW13738 Hydraulic Pump Gear

( Brand: Lycoming ), ( Manufacturer Part Number: LW13738 ), ( Part Type: Hydraulic Pump Gear )

Review LYCOMING Hydraulic Pump Gear fits IO-540

The **Lycoming LW13738 Hydraulic Pump Gear (Part #72964) for IO-540 Engines** is a precision-engineered component designed to deliver reliable hydraulic power for critical aircraft systems, ensuring seamless operation of controls, flaps, and other hydraulic-dependent mechanisms. Manufactured to meet strict aviation industry standards, this gear is a key element of the Lycoming hydraulic pump assembly, specifically tailored for use with the iconic IO-540 series of air-cooled, fuel-injected engines, which power a wide range of general aviation aircraft, including Cessna models like the 172, 182, and 206, as well as Mooney, Piper, and other aircraft in the same class. Crafted from high-grade alloy steel, the gear is heat-treated and machined to exacting tolerances to withstand the demanding stresses of continuous operation, high-pressure hydraulic fluid, and the thermal fluctuations inherent in aviation environments. Its robust construction ensures minimal wear and extended service life, reducing the likelihood of costly downtime and maintenance disruptions. The gear s precise tooth geometry and surface finish optimize hydraulic flow efficiency, contributing to smoother hydraulic system performance and reduced energy loss. Whether replacing a worn-out component or serving as an original equipment replacement (OER) during overhaul or upgrade projects, this gear is a critical part that upholds the reliability and safety standards expected in aviation. Its compatibility with the IO-540 s hydraulic system underscores its importance in maintaining the aircraft s operational integrity, making it an indispensable choice for mechanics, avionics technicians, and aircraft owners committed to preserving peak performance and longevity.

### **Pros and Cons of Buying a Lycoming LW13738 Hydraulic Pump (Gear 72964) for an IO-540 Engine**

1. **Compatibility with IO-540 Engines** The LW13738 hydraulic pump is specifically designed for Lycoming IO-540 series engines, ensuring proper fitment and functionality without modifications.

2. **Reliable Performance** Lycoming components are known for durability and consistent operation, reducing the risk of premature failure in critical systems like hydraulic oil pumps.

3. **Standardized Part Availability** As an OEM or high-quality aftermarket part, replacement components and service manuals are widely available, simplifying maintenance and repairs.

4. **Hydraulic System Efficiency** A properly functioning hydraulic pump ensures smooth operation of engine accessories (e.g., fuel pumps, oil pumps, and carburetor actuators), reducing wear on related components.

5. **Long-Term Cost Savings** While the initial cost may be higher than some generic alternatives, a reliable pump minimizes unexpected breakdowns and costly repairs over time.

6. **Warranty Coverage** Purchasing from a reputable dealer may include warranties, providing peace of mind against defects in materials or workmanship.

7. **Engine Protection** A failing hydraulic pump can lead to engine damage if it starves critical systems of oil or hydraulic pressure. A new pump prevents such risks.

1. **Higher Upfront Cost** Compared to generic or aftermarket pumps, Lycoming OEM or high-quality aftermarket parts can be more expensive, increasing initial maintenance costs.

2. **Limited Customization** Since it is a standardized part, modifications or non-standard configurations may not be possible without additional workarounds.

3. **Potential Counterfeit Risks** If purchasing from untrusted sources, there is a risk of receiving counterfeit or substandard parts, which could fail prematurely.

4. **Installation Complexity** Depending on engine modifications or space constraints, installation may require disassembly of related components, adding labor time and cost.

5. **Depreciation Over Time** Like all aircraft parts, hydraulic pumps may lose value if the aircraft is not maintained properly or if the engine is not flown regularly.

6. **Specialized Knowledge Required** Proper installation and testing of the hydraulic pump may require an A&P mechanic with experience in Lycoming engines to avoid misalignment or pressure issues.

---

### **Conclusion**

The **Lycoming LW13738 hydraulic pump (Gear 72964) is a high-quality, reliable choice for IO-540 engines**, offering long-term dependability and compatibility with Lycoming s design standards. While the upfront cost is higher than some alternatives, the reduced risk of failure and protection of critical engine systems make it a **strong investment for aircraft owners prioritizing safety and longevity**.

However, if budget constraints are a concern, **thoroughly vetted aftermarket alternatives** (e.g., from reputable manufacturers like **BendixKing, Hartzell, or Summit**) may offer comparable performance at a lower cost provided they meet FAA certification standards.

---

### **Recommendation**

- **Buy from an authorized Lycoming dealer or a trusted aircraft parts supplier** (e.g., **Aircraft Spruce, Summit, or a local A&P shop**) to ensure authenticity and warranty coverage.

- **Verify compatibility** with your specific IO-540 engine model and any modifications (e.g., turbocharging, fuel injection) that may affect hydraulic system requirements.

- **Have a qualified mechanic inspect the pump** before installation to confirm proper function and alignment.

- **Consider a full hydraulic system flush** if the pump is being installed in an older engine to remove contaminants that could affect performance.

- **Document the purchase and installation** for maintenance records, as Lycoming parts often require proper logging for warranty or inspection purposes.

**Final Verdict:** If reliability and long-term engine protection are priorities, the **LW13738 is the best choice**. If cost is a limiting factor, **opt for a high-quality aftermarket alternative from a trusted source** but never compromise on FAA-approved components.

Details:

Shipping via USPS Priority Mail. Appears new old stock, but no 8130/paperwork. Lycoming Hydraulic Pump Gear 72964 for IO-540 engine.

part #: lw13738 prices

• $139.00-$471.20

specifications engineaviatio:

• for models: Io-540
• brand: Lycoming
• mpn: Lw13738
• part type: Hydraulic Pump Gear

seller engineaviatio:

• # reviews: 548
• city: Fort Worth, Texas
• rating: 100.0%

shipping engineaviatio:

• transit: 4-10 Days
• cost: $12.00
• service: USPS Priority Mail
• carrier: USPS
• class: Expedited
• type: Fixed

payments engineaviatio:

• money order
• wallet: Paypal
• other
• credit card: Visa

offer engineaviatio:

• started: March 30, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1

general engineaviatio:

• Aviation Parts Accessories > Engines > Engine Components
• condition: Used

returns engineaviatio:

• policy: No Returns

Lycoming LW13738 Is Similar To:

• 012023-015-01 Lycoming Hydraulic Pump Piper Aztec (55.1% similar) Lycoming IO-540 C4B5 hydraulic pump as removed P/N 01HYDRAULIC pump piper Aztec PA-23 see pictures part of 30 day money back guarantee buyer is to determine the state airworthiness. Please if there is any problem. Buyer is to determine the state of airworthiness...(September 2nd, 2018)
• 05k19423s Unbranded Lycoming Oil Pump (34.9% similar) I have a used oil pump gear and shaft set from Lycoming O-320 E3D. Gears appear to be ingot shape. Good for air boat or. Thanks looking. They are the steel gears...(May 23rd, 2017)
• 10575 Lycoming Shaft Idler Gear (40% similar) The end user is to determine this item be in an airworthy condition and comply with all applicable Farsi when installing parts on a certified or experimental aircraft. I have closely inspected this item and described it accurately, could be nos, used or for parts only will state so in listing. I ...(October 4th, 2017)
• 15472 Lycoming Mechanical Fuel Pump (40.5% similar) You are buying on a Lycoming mechanical fuel pump, as removed. Airworthiness can only be determined by the FAA approved mechanic installing said item. Any is for the sole purpose of identifying an item. All manuals are for reference only...(February 18th, 2017)
• 154729 Lycoming Fuel Pump (43.2% similar) What was in the box pump, gasket and fuel pump mounting bolts along with a Allen wrench. There was also another 4 hole gasket and not sure why that unless something else has to be removed prior installation of the fuel pump. When moving the fuel pump lever it does sound like its functioning. The ...(May 12th, 2017)
• 15b26066 Lycoming Hydraulic Lifter Plungers New (47.9% similar) This is a set new lifter plungers for all Lycoming except solid engines, part no. Shipping and handling...(February 15th, 2017)
• 15b28093 Lycoming New Hydraulic Lifter (52.9% similar) Submit best offers at any time. Mainland states only...(May 11th, 2017)
• 200cc Lycoming Continental Vacuum Pump (36.8% similar) ...(October 17th, 2018)
• 28f21254 Lycoming Vacuum Pump Drive (42.9% similar) 50 hours, like new. All parts shown. Came off a Lycoming IO360 D1A with 50 hours on it. Perfect condition...(March 10th, 2019)
• 2pr4008rd-5 Lycoming Continental Pesco Fuel Pump (33% similar) ...(June 11th, 2018)
• 2pr400brd-5 Lycoming Continental Pesco Fuel Pump (33% similar) Serial number: pe...(June 11th, 2018)