# 20840772 Lock Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Application-specific Lock Ring used in the crankcase, timing cover and internal retention assembly on the listed Volvo Penta engines. Provides positive axial retention in the machined groove of the associated shaft, cover or housing.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TD720VE PP
-   Volvo Penta TD420VE
-   Volvo Penta D7A-B TA
-   Volvo Penta D7A-T
-   Volvo Penta D7A-TA
-   Volvo Penta D7C-B TA
-   Volvo Penta D7C-TA
-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD620VE
-   Volvo Penta TAD750GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD420VE
-   Volvo Penta TAD532GE EDC4

-   **Engine Family:** TD, D, TAD
-   **HP Range:** Approximately 160-220 HP
-   **Year Range:** Approximately 2004 - 2015

## ⚙️ Key Features

-   Genuine Volvo Penta Lock Ring
-   Designed for the crankcase, timing cover and internal retention assembly
-   Provides positive axial retention in the machined groove of the associated shaft, cover or housing
-   Catalogued for TAD550GE; TAD551GE; TAD560VE; TAD561VE
-   Engine type: Six-cylinder turbocharged industrial diesel
-   Quantity varies by assembly, most commonly 12

## 🔌 Function

Provides positive axial retention in the machined groove of the associated shaft, cover or housing.

## ⚠️ Common Signs of Failure

-   Component working out of its housing or shifting along the shaft
-   Ticking, knocking or a scraping noise as the part moves
-   Ring found sprung open, distorted, or out of its groove
-   Groove edge worn or damaged by a ring that has been moving

## 🛠️ Service Notes

-   Measure the installed clearance and inspect the shaft or bore before replacing the wear component.
-   Lubricate and press-fit only as specified; do not transfer installation force through the rolling elements.

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21025096 - crankcase
-   24426064 - cover
-   20412359 - O-ring
-   11700278 - bushings
-   11700284 - bushings
-   11700285 - bushings
-   20405721 - cap plug
-   20441859 - fill plug
-   20405584 - guide sleeve
-   21076473 - sealing compound

### Other-Brand OEM Numbers

-   VOE20840772 - Volvo Construction Equipment prefixed number format

## 📦 Condition

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

## Details

- **Price:** 1.58 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1.58 AUD | In stock |

## Images

- 20840772 Lock Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20840772-lock-ring-genuine-volvo-penta)
> Updated: 2026-10-11