955997 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta o-ring weighing 0.002 kg and listed for 50 applications across the MD, MB, D and AQD families and IPS installations. It supersedes 876449.

🚤 Compatibility

• Engine Family: MD, MB, D, AQD, IPS
• HP Range: 260-435 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.002 kg
• Supersedes 876449
• 50 applications, including IPS installations
• Order by part number
• Also supersedes Volvo part number 875576

🔌 Function

Seals the joint between two faces, squeezed into its groove to hold pressure and keep fluid where it belongs.

⚠️ Common Signs of Failure

• Weeping or dripping at the joint
• Ring flattened, hardened or shiny
• Nicks or splits from assembly damage
• Swelling or softening from the wrong fluid

🛠️ Service Notes

• Always fit a new O-ring — never refit one that has been removed, as it has already taken a set in its groove
• Clean the groove and both sealing faces and check them for nicks, scoring and corrosion pitting; a damaged groove will leak however good the new seal is
• Smear the ring with a little clean lubricant compatible with the fluid it seals, then roll it into place by hand so it sits untwisted and fully in its groove
• Never lever an O-ring over a sharp edge or thread with a screwdriver; use a blunt plastic tool and protect any edge the ring has to pass
• Assemble the joint squarely and tighten to the figure and sequence given in the workshop manual for your engine — over-tightening extrudes the ring and causes the very leak you were curing

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 955997 → Supersedes 876449

Aftermarket / Verified Equivalents

• SLP: OR-997

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-330D-E, D6-370D-E, D6-330D-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-330D-F, D6-370D-F, D6-300D-F, D6-310D-D, D6-310D-C, D6-310D-E, D6-435D-D, D6-435D-E, D6-435D-F, D6-435D-C
• Volvo Penta D4-260D-C, D4-260D-D, D4-260D-E, D4-260D-F, D4-300D-C, D4-300D-D, D4-300D-E, D4-300D-F
• Volvo Penta IPS-A, IPS-B, IPS-F, IPS-C, IPS-D, IPS-E
• Volvo Penta MD5A, MD5B, MD5C
• Volvo Penta 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q
• Volvo Penta MD11C, MD11D
• Volvo Penta MD17C, MD17D
• Volvo Penta MD6A, MD6B
• Volvo Penta MD7B, MD7A
• Volvo Penta AQD2B
• Volvo Penta MB10A
• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD3B
• Volvo Penta MD67C