183840 Roller Bearing | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta roller bearing is a precision rolling-element or raceway component used in the marine transmission tapered-roller bearing position. 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 supports the selected transmission shaft as a complete matched tapered-roller bearing assembly. Selection must be confirmed by OEM part number 183840, the exact engine/product model, serial number and installed configuration.

🚤 Compatibility

• Engine Family: D, IPS
• HP Range: 260-480 HP

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 183840
• Supersedes previous part numbers 181304 and 181303, which were listed as separate inner ring and cup
• Net weight 0.490 kg
• Fits D series marine diesel engines and IPS pod drive installations

🔌 Function

Supports the selected transmission shaft as a complete matched tapered-roller bearing assembly. 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 growling noise that changes with load
• Spalling, pitting or flaking on the raceways
• Heat discolouration of rollers or races
• Shaft play, run-out or vibration
• Metal debris in the oil

🛠️ Service Notes

• Keep the bearing in its wrapper until the moment of fitting and work with clean hands and clean tools — a roller bearing is ruined by grit long before it is ruined by use
• Apply the fitting force only to the race being fitted, using a tube or drift that bears squarely on the whole ring face, so the load never passes through the rollers; never strike the bearing or press on the loose race
• Warming the inner race evenly in oil or a purpose-made bearing heater lets an interference fit slide on without hammering — never heat a bearing with a flame, and stay within the temperature the manufacturer's instructions allow
• Check the shaft and housing seats for wear, scoring and burrs first; a slack or damaged seat will destroy a new bearing quickly
• Lubricate with the grade specified for that position, and where the bearing takes an adjustable preload or endfloat — tapered roller bearings especially — set it by the workshop manual procedure rather than by feel

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 183840 → Supersedes 181304

OEM / Related Numbers

• 181303 earlier number superseded by this part
• 181304 earlier number superseded by this part

Other-Brand OEM Numbers

• Timken: HM88610
• Timken: TRBM-88610

Aftermarket / Verified Equivalents

• National: HM88610

📦 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, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, 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-C, IPS-D, IPS-E, IPS-F
• Volvo Penta 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q
• Volvo Penta IPS10-A, IPS10-B