181288 Needle Bearing | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta needle bearing is a precision rolling-element or raceway component used in the MD5A lower-gear countershaft/gear-set assembly. It is manufactured to the original Volvo dimensional, material and interface requirements so the serviced assembly retains its designed alignment, sealing, load capacity and operating reliability. In service, it provides compact radial support for the lower-gear countershaft/gear set. Selection must be confirmed by OEM part number 181288, the exact engine/product model, serial number and installed configuration.

🚤 Compatibility

• Engine Family: MD, MB, AQ, BB, B, AQD

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 181288
• Needle bearing for high radial load in a restricted section
• Net weight 0.132 kg
• Fits MD, MB, AQ, BB, B and AQD series engines and drives

🔌 Function

Provides compact radial support for the lower-gear countershaft/gear set. Measure shaft and housing fits, renew contaminated lubricant and related seals, and install using force only through the race being fitted. Set preload or end float to the applicable Volvo Penta specification.

⚠️ Common Signs of Failure

• Rumbling or grinding noise from the bearing location
• Scoring or indentation of the shaft running surface
• Rollers seized, flattened or out of the cage
• Play or vibration at the supported shaft
• Steel particles in the oil or on the magnetic plug

🛠️ Service Notes

• Unlike sibling 240453 in this range, no companion bushing or shaft key is listed against this number — inspect the shaft journal on its own merits before fitting a new bearing to it
• Covers a broad span of early MD, MB, AQ, BB, B and AQD engines; confirm the housing bore for your specific model before ordering, as older ranges are not all interchangeable despite the shared listing

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 851485 bottom gear
• 851486 lower gear component
• 851473 thrust-bearing housing
• 850071 countershaft
• 806620 roller bearing
• 851286 gear set
• 851301 propeller shaft
• 181287 ball bearing

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• 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 MD5A, MD5B, MD5C
• Volvo Penta AQ115A, AQ115B
• Volvo Penta AQD21A, AQD21B
• Volvo Penta MD11C, MD11D
• Volvo Penta MD17C, MD17D
• Volvo Penta MD21B, MD21A
• Volvo Penta MD6A, MD6B
• Volvo Penta MD7B, MD7A
• Volvo Penta 100S, 110S
• Volvo Penta AQ165A
• Volvo Penta AQD2B
• Volvo Penta B20
• Volvo Penta BB165A
• Volvo Penta MB10A
• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD3B
• Volvo Penta MD67C