190418 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta o-ring is an elastomeric sealing ring sized for the specified groove, bore and fluid service used in the reverse-gear clutch and engine circulation-pump sealing. It is manufactured to the original Volvo Penta dimensional, material and interface requirements so the serviced assembly retains its designed alignment, sealing, load capacity and operating reliability. In service, it seals the selected clutch piston or pump housing connection against hydraulic oil or coolant leakage. Selection must be confirmed by OEM part number 190418, the exact engine or product model, serial number and installed configuration.

🚤 Compatibility

• Engine Family: MD, TMD, MB, AQ, TD, BB, D, B, TAMD, TAD, AQD

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta OEM o-ring
• OEM part number 190418
• Clean the groove, lubricate with a compatible fluid and avoid twisting, stretching or cutting the O-ring during assembly.

🔌 Function

Seals the selected clutch piston or pump housing connection against hydraulic oil or coolant leakage. Clean the groove, lubricate with a compatible fluid and avoid twisting, stretching or cutting the O-ring during assembly.

⚠️ Common Signs of Failure

• Fluid seepage or air entry at the sealed joint
• Flattening, hardening or loss of elastic recovery
• Cuts, nicks, extrusion or spiral twisting
• Swelling, softening or cracking from incompatible fluid or heat
• Recurring leakage caused by a corroded groove or damaged mating surface

🛠️ 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 / Related Numbers

• 875461 repair/overhaul kit

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B, TAMD122P-C
• Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
• Volvo Penta AQ170B, AQ170C, AQ170A
• Volvo Penta BB115A, BB115B, BB115C
• Volvo Penta BB170B, BB170C, BB170A
• Volvo Penta MB20A, MB20B, MB20C
• Volvo Penta MD100A, MD100B, MD100B-CC
• Volvo Penta MD5A, MD5B, MD5C
• Volvo Penta TAD120AHC, TAD120BHC, TAD120CHC
• Volvo Penta AQ115A, AQ115B
• Volvo Penta MD11C, MD11D
• Volvo Penta MD17C, MD17D
• Volvo Penta MD6A, MD6B
• Volvo Penta MD7B, MD7A
• Volvo Penta 100S, 110S
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TAMD120A, TAMD120B
• Volvo Penta TD100AHC, TD100CHC
• Volvo Penta TD120AHC, TD120BHC
• Volvo Penta TMD100A, TMD100C
• Volvo Penta TMD120A, TMD120B
• Volvo Penta AQ165A
• Volvo Penta AQD2B
• Volvo Penta AQD21A
• Volvo Penta B20
• Volvo Penta BB165A
• Volvo Penta D100BHC
• Volvo Penta MB10A
• Volvo Penta MD1B
• Volvo Penta MD120A
• Volvo Penta MD2B
• Volvo Penta MD21A
• Volvo Penta MD3B
• Volvo Penta MD67C
• Volvo Penta TAD121CHC
• Volvo Penta TAMD103A
• Volvo Penta TAMD121D
• Volvo Penta TD121CHC
• Volvo Penta TMD102A
• Volvo Penta TMD121C
• Volvo Penta TMD122A