# 21510857 Insert | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta TAD7 Crankshaft Gear Insert - Part Number: 21510857

  

A precision insert fitted in the crankshaft and timing-gear assembly of Volvo Penta TAD7 industrial and generating-set engines.

  

⚙️ Key Features

  

• Crankshaft and timing-gear location

• Precision-machined locating component

• Maintains gear alignment and drive position

• Used with crankshaft gears 20898072 and 20860794

• Serial-controlled replacement for the corresponding earlier insert position

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• Current OEM reference: 21510857

• Related earlier insert reference: 20459144

  

OEM / Related Numbers:

  

• 21510857

• 20459144 - Related earlier insert

• 20898081 / 21460971 / 22306393 / 22923731 - Related crankshafts

• 20898072 / 20860794 - Crankshaft gears

• 20777676 - Flange

• 21040125 / 21040133 / 21040144 - Main bearings

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

• TAD734GE

• TAD750GE

• TAD751GE

• TAD752GE

• TAD753GE

• TAD754GE

• Confirm crankshaft serial break and insert position

  

🔌 Function

  

The insert locates the crankshaft gear or adjoining flange accurately so timing and rotational drive remain correctly aligned.

  

Common signs of failure or damage:

  

• Gear movement or fretting

• Damaged or deformed insert

• Timing-gear noise

• Incorrect gear alignment

• Wear in the crankshaft locating bore

• Metal debris in the timing housing

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 13.48 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 13.48 AUD | In stock |

## Images

- 21510857 Insert | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21510857-insert-genuine-volvo-penta)
> Updated: 2026-08-02