# 20460512 Nut Retainer | Genuine Volvo Penta Part

## 🔧 Product Description

Mechanical retainer that prevents the hydraulic-pump shaft or gear nut loosening in service.

## 🚤 Compatibility

-   **Engine Family:** D, TD, TAD, MD
-   **HP Range:** Approximately 130-160 HP
-   **Year Range:** Approximately 1998 - 2006

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta hydraulic-pump nut retainer
-   Designed for the engine-driven servo-oil / hydraulic pump
-   Direct service replacement for Volvo Penta part number 20460512
-   Mechanical retainer that prevents the hydraulic-pump shaft or gear nut loosening in service
-   Engine type: 4.0-litre four-cylinder turbocharged industrial diesel

## 🔌 Function

Mechanically locks the hydraulic-pump shaft or gear nut once it has been tightened, holding the nut against rotation so it cannot back off under the vibration and torque reversals of the pump drive.

## ⚠️ Common Signs of Failure

-   Retaining nut found loose despite having been correctly tightened
-   Knock or rattle from the pump drive that worsens with engine speed
-   Retainer tab found cracked, sheared or bent flat against the nut
-   Retainer that has already been folded and unfolded, and will not hold again
-   Bright wear marks or debris where the loose nut has been fretting on the shaft

## 🛠️ Service Notes

-   Confirm thread, length, grade and any single-use restriction against the exact application
-   Clean the threads and use the specified torque, angle and locking method

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20460510 - servo-oil pump
-   20460511 - Woodruff key, nut retainer and washer
-   20460513 - Woodruff key, nut retainer and washer
-   20460515 - pump camshaft seal
-   20460516 - mounting gasket
-   20460514 - related gasket / service kit
-   20512174 - application drive-gear references
-   20555182 - application drive-gear references
-   20940389 - application drive-gear references
-   20460506 - retaining nut and six-point socket screw
-   20460508 - retaining nut and six-point socket screw

### Other-Brand OEM Numbers

-   VOE20460512 - Volvo Construction Equipment prefixed number format

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D5A-B TA, D5A-T, D5A-TA
-   Volvo Penta MD2010, MD2010B
-   Volvo Penta D7A-T
-   Volvo Penta TAD420VE
-   Volvo Penta TAD520VE
-   Volvo Penta TAD560VE
-   Volvo Penta TAD561VE
-   Volvo Penta TAD620VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   Volvo Penta TAD720VE
-   Volvo Penta TAD721VE
-   Volvo Penta TAD722VE
-   Volvo Penta TAD750VE
-   Volvo Penta TAD760VE
-   Volvo Penta TAD761VE
-   Volvo Penta TAD762VE
-   Volvo Penta TAD763VE
-   Volvo Penta TAD764VE
-   Volvo Penta TAD765VE
-   Volvo Penta TD420VE

## Details

- **Price:** 15.13 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.13 AUD | In stock |

## Images

- 20460512 Nut Retainer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20460512-nut-retainer-genuine-volvo-penta)
> Updated: 2026-10-10