21040125 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Volvo Penta lists this part as the main bearing kit supplied inside its published overhaul kit 3594243, for TAD734GE.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD734GE
• Volvo Penta TAD752GE
• Volvo Penta TAD753GE
• Volvo Penta TAD754GE

• Engine Family: TAD

⚙️ Key Features

• Standard 85 mm main-bearing grade
• Genuine precision bearing shell or bearing component
• Correct oil-clearance and locating geometry
• Matched material and overlay specification
• Grade-specific for the stated journal dimension
• Do not mix standard and undersize repair grades
• Engine type: Volvo Penta 7-litre inline six-cylinder generator-drive diesel
• 85mm (Volvo assembly listing)
• 7 used per assembly
• Listed by Volvo Penta as the main bearing kit in its overhaul kits
• 7 off in overhaul kit 3594243 (TAD734GE)
• Used in overhaul kits: 3594243 x7 (TAD734GE)

🔌 Function

Supports the rotating crankshaft or connecting rod on a controlled hydrodynamic oil film while maintaining alignment and oil clearance.

⚠️ Common Signs of Failure

• Low oil pressure or metallic knocking
• Copper or backing material visible on the shell
• Scoring, wiping, pitting or heat discolouration
• Excessive journal clearance or crankshaft movement
• Metal debris in the oil and filter

🛠️ Service Notes

• Replace main bearings as a complete set and never mix new shells with used ones; check that the grade or size supplied matches the crankshaft, which may have been reground
• Fit the shells with dry backs — shell backs and housings must be clean, dry and free of oil, grease and debris so the shell beds fully onto the housing and can carry heat away
• Make sure each shell's locating tang sits in its recess and that the shell is flush with the housing face rather than standing proud
• Never scrape, file, polish or dress a bearing shell and keep abrasives away from it; check the running clearance against the figures in the workshop manual for your engine using a crush-type clearance gauge
• Lubricate the running surfaces with clean engine oil, refit each cap in its original position and direction, tighten in the stages the manual gives, then turn the crankshaft by hand to confirm it is free
• Volvo Penta's overhaul kits call for 7 off of this part

🔄 Supersession & Cross Reference

OEM / Related Numbers

• Volvo 20945114

Other-Brand OEM Numbers

• VOE21040125
• Deutz 02931532
• Kolbenschmidt: 79431600
• Mahle: 209 HL 21578 000
• Glyco: 72-4717 STD

📦 Condition

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