181648 Ball Bearing | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta ball bearing is a precision rolling-element or raceway component used in the seawater-pump and D5 cooling fan-hub bearing positions. 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 seawater-pump or fan-hub shaft and maintains seal, pulley and impeller alignment. Selection must be confirmed by OEM part number 181648, the exact engine/product model, serial number and installed configuration.

🚤 Compatibility

• Engine Family: D, TD, TAD
• HP Range: 180-300 HP

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 181648
• Supersedes previous part number 1526189
• Net weight 0.240 kg
• Fits D, TD and TAD series marine diesel engines

🔌 Function

Supports the seawater-pump or fan-hub shaft and maintains seal, pulley and impeller alignment. 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 whining tracking engine speed
• Radial play felt at the shaft
• Rough or notchy rotation by hand
• Excess heat at the bearing housing
• Bright metal particles in the oil

🛠️ Service Notes

• Work clean — leave the bearing in its wrapping until the moment it goes in, and do not wash the preservative out or blow it dry with compressed air
• Apply the fitting force only to the ring being fitted, through a tube or drift that bears on that ring alone; force pushed through the balls from one ring to the other dents the raceways and the bearing will be noisy and short-lived from the first run
• Where the fit calls for it, expand the inner ring with even, controlled heat rather than driving it on, and never heat a bearing with a flame or beyond the temperature given in the workshop manual for your engine
• Check the shaft and housing seats before fitting — scoring, burrs, corrosion or a worn seat will ruin a new bearing, and fretting marks mean the seat itself needs attention
• Fit the bearing square and fully home against its shoulder, note which way round any sealed, shielded or marked face must go, and lubricate with the grease or oil specified for the application before it is turned under load

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 181648 → Supersedes 1526189

OEM / Related Numbers

• 1526189 earlier number superseded by this part
• 20450749 referenced in the part notes
• 3584062 D4 seawater pump
• 20450755 fan hub

Other-Brand OEM Numbers

• SKF: 6305-2RSJ
• FAG: 6305-C-2HRS

Aftermarket / Verified Equivalents

• National: 305DD

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D4-260I-F, D4-180I-F, D4-225I-F, D4-300I-F
• Volvo Penta D7A-B TA, D7A-T, D7C-B TA
• Volvo Penta D5A-B TA, D5A-T
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD420VE
• Volvo Penta TAD520VE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD720VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD750VE
• Volvo Penta TAD760VE
• Volvo Penta TD420VE