Gear Gasket Kit – Fits Volvo Penta 40 Series Marine Diesel Engines (Replaces 876349, 875634)
Gear Gasket Kit – Fits Volvo Penta 40 Series Marine Diesel Engines (Replaces 876349, 875634) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Gear Gasket Kit – Fits Volvo Penta 40 Series Marine Diesel Engines ...
Product Details
This Gear Gasket Kit is designed for a precise fit on Volvo Penta 40 Series marine diesel engines, including models MD40A, TMD40A/B/C, AQD40A, AQAD40A/B, and TAMD40A/B. It provides essential seals and gaskets for servicing the engine's gear section, ensuring a reliable, leak-free repair.
This kit serves as a direct replacement for Volvo Penta part numbers 876349 and 875634, as well as Orbitrade 21349 (sump conversion kit), providing a comprehensive interchange solution.
- Installation Location: Mounts in the engine gear and sump section.
- Fuel Compatibility: Designed exclusively for diesel-fueled marine engines.
- Core Components: Includes all necessary gaskets and seals for the gear/sump assembly.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Volvo Penta | 876349 | Also replaces 875634 |
| Orbitrade | 21349 | sump conversion kit |
Engine & Model Compatibility
Confirm your engine model in the table below.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | MD40A | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | TMD40A | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | TMD40B | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | TMD40C | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | AQD40A | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | AQAD40A | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | AQAD40B | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | TAMD40A | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | TAMD40B | 4-Stroke | 876349 | Also replaces 875634 |
| Volvo Penta | AD40B | 4-Stroke | 876349 | Also replaces 875634 |
Technical Specs
- Product Type
- Gear Gasket Kit / Sump Conversion Gasket Set
- Installation
- Engine Gear Section
- Fuel Type
- Diesel
- Dimensions
- 87.0cm (L) x 30.5cm (W) x 3.5cm (H)
- Other Technical Attributes
- Includes gaskets and seals for gear/sump section
What’s in the Box
- Gaskets and Seals for Gear/Sump Section
Note: This kit includes components equivalent to Orbitrade 11971 seal, 11487 gasket & 15971 o-ring (Volvo 3852851, 804695 & 968971), which may no longer be available for individual purchase.
Installation Notes
- Ensure the engine is off, cool, and disconnected from the battery. Drain engine oil and coolant as required by your service manual.
- Carefully remove any components obstructing access to the engine's gear and sump housing.
- Detach the housing, taking care not to damage surrounding parts. Remove the old gaskets and seals.
- Thoroughly clean all mating surfaces to remove any old gasket material, sealant, oil, or debris. A clean, dry surface is critical for a proper seal.
- Carefully place the new gaskets and seals from the kit into their correct positions. Do not use additional sealant unless specified by the engine manufacturer.
- Reassemble all components, tightening bolts in the sequence and to the torque specifications outlined in your service manual.
- Refill the engine with the correct type and amount of oil and coolant. Before starting the engine, check for any immediate signs of leaks.
Troubleshooting & FAQ
Will this kit fit my TAMD40B engine?
Yes, this kit is confirmed to be compatible with all Volvo Penta 40 series engines, including the TAMD40B. To ensure a perfect match, always cross-reference the part numbers (876349, 875634) with those listed in your engine's service manual.
What are the signs my gear gaskets need to be replaced?
Common symptoms of failing gear gaskets include visible oil or coolant leaks around the gear housing, a milky or emulsified appearance in the engine oil (indicating fluid mixing), or engine overheating issues that can be traced back to coolant loss in the gear section.
Is this a complete engine overhaul kit?
No, this is a specialized gasket kit for the gear and sump section only. It does not include components for a full engine overhaul, such as pistons, rings, or other major internal parts. For example, the cylinder liner kit must be sourced separately.
How often should these gaskets be replaced?
Gaskets do not have a fixed replacement interval. They should be replaced as a preventative measure whenever the gear section is disassembled for service, or immediately if any leaks or signs of failure are detected.
What is the difference between this aftermarket kit and an OEM part?
This aftermarket kit is engineered to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function, but is available at a more accessible price point. It directly cross-references with Volvo Penta OEM parts 876349 and 875634.
Can I install this gasket kit myself?
While DIY installation is possible for individuals with advanced mechanical experience and the proper tools, we strongly recommend professional installation. This ensures that all components are sealed correctly and torqued to factory specifications, which is critical for engine safety and longevity.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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