# 21040125 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Main Bearing - Part Number: 21040125

  

Brand-new genuine Volvo Penta main bearing manufactured to the specified journal diameter and repair grade for use in the Volvo Penta TAD734GE crankshaft and connecting-rod bearing system. Bearing size must be selected from measured crankshaft dimensions rather than assumed from engine model alone. Standard-size 85 mm main-bearing shell. Use only with a crankshaft journal within the standard factory dimension.

  

⚙️ 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

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21040125 - OEM reference

  

OEM / Related Numbers:

  

• Volvo Penta 21040125

• VOE21040125

• Volvo 20945114

• Deutz 02931532

  

Aftermarket / Verified Equivalents:

  

• Kolbenschmidt: 79431600

• MAHLE: 209HL21578000

• Glyco: 72-4717 STD

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta TAD734GE crankshaft and connecting-rod bearing system

  

Typically suits:

  

• Engine models:

• TAD734GE

• Power Rating: 340-357 hp depending on rated speed

• Engine Type: Volvo Penta 7-litre inline six-cylinder generator-drive diesel

• Serial / Configuration: Measure the crankshaft journal and confirm the exact bearing grade before ordering; standard and undersize shells are not interchangeable

• Year Range: TAD734GE production applications

  

🔌 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

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 75.72 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 75.72 AUD | In stock |

## Images

- 21040125 Main Bearing | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21040125-main-bearing-genuine-volvo-penta)
> Updated: 2026-08-01