20405541 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Crankshaft Main Bearing - 0.50 mm Undersize - Part Number: 20405541

Genuine Volvo Penta 0.50 mm undersize crankshaft main-bearing shell for D5A, D7A and TD/TAD520-TAD733 engines. This bearing is intended only for a crankshaft journal professionally ground to the matching repair dimension.

⚙️ Key Features

• 0.50 mm undersize repair bearing

• Five main-bearing positions on four-cylinder engines and seven on six-cylinder engines

• Maintains the specified crankshaft oil clearance after journal machining

• Not interchangeable with standard or 0.25 mm undersize bearings

• Crankshaft journals and bearing bores must be measured before ordering

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20405541 - 0.50 mm undersize main-bearing reference

OEM / Related Numbers:

• 21141948 - related standard main-bearing reference

• 21234191 / 20405529 - related 0.25 mm undersize references

Aftermarket / Verified Equivalents:

• None confirmed

🚤 Compatibility

Commonly used on:

• Volvo Penta D5A / D7A crankshaft main-bearing assemblies

Typically suits:

• Engine / equipment models:

• TD520GE

• TAD520GE

• TAD530GE

• TAD531GE

• TAD532GE

• TD720GE

• TAD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• D5A-T

• D5A-TA

• D5A-B TA

• D7A-T

• D7A-TA

• D7A-B TA

• D7C-TA

• D7C-B TA

• Engine Type: Volvo Penta four- and six-cylinder industrial diesel

• Year / Serial Range: Only for crankshafts ground to the 0.50 mm undersize repair specification

🔌 Function

Supports the crankshaft main journals on a pressurised oil film and maintains crankshaft alignment.

Common signs of failure:

• Low engine-oil pressure

• Main-bearing knock

• Excessive crankshaft clearance

• Bearing scoring, wiping or copper exposure

• Metallic debris in the engine oil

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging