21661186 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta TAD560VE Main Bearing, 0.50mm Undersize - Part Number: 21661186

An undersize crankshaft main-bearing shell used when the TAD560VE crankshaft main journals have been ground to 0.50mm below standard diameter.

⚙️ Key Features

• Journal undersize: 0.50mm

• Main-bearing position

• Precision tri-metal bearing construction

• Designed for 85mm standard main-journal family

• Must be selected after crankshaft measurement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Current OEM reference: 21661186

OEM / Related Numbers:

• 21661186

• 20945114 - Standard main bearing, 85mm

• 21460930 / 22306360 - Related crankshafts

• 21141955 - Thrust washer

• 21510857 - Crankshaft gear insert

• 21664654 / 21664655 - Related undersize big-end bearing kits

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

• TAD560VE engine crankshaft assembly

• Use only with crankshaft journals machined to 0.50mm undersize

• Bearing clearance must be measured during engine rebuilding

🔌 Function

The bearing supports the crankshaft in the cylinder block and maintains the oil film required between the crankshaft journal and bearing surface.

Common signs of failure or damage:

• Low engine-oil pressure

• Deep crankcase knock

• Scored or wiped bearing surface

• Excessive crankshaft clearance

• Metal particles in engine oil

• Incorrect bearing size after journal machining

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging