# 20405907 Sealing Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta sealing ring used around each Stage 1 unit injection pump. Twelve rings are used in the four-pump TD520GE arrangement, forming the multi-seal stack between the pump body and engine block.

## 🚤 Compatibility

-   **Engine Family:** D, TD, TAD, MD

Full model list at the end of this description.

## ⚙️ Key Features

-   Fuel- and oil-resistant unit-pump sealing ring
-   Twelve used with four Stage 1 pumps in the TD520GE arrangement
-   Used with injection pump 11700423 / exchange pump 3803515
-   Works with base shims 20405543 and selectable timing shims
-   All rings on a removed pump should be renewed
-   Engine type: Volvo Penta four- and six-cylinder mechanical unit-pump diesel

## 🔌 Function

Seals the unit injection pump to the engine block, separating fuel, lubricating oil and the external environment.

## ⚠️ Common Signs of Failure

-   Fuel or engine-oil leakage around a unit pump
-   Seal swelling, cutting or hardening
-   Pump difficult to seat correctly
-   Leakage after pump replacement

## 🛠️ Service Notes

-   Always fit a new sealing ring rather than reusing the old one — a ring that has been compressed once has taken a set and will not seal reliably a second time
-   Clean the groove or seat and check it for scoring, corrosion and old sealant before fitting; a mark across the sealing face will leak however good the ring is
-   Ease the ring into place without stretching, twisting or dragging it over sharp edges or threads, and check it is seated squarely all the way round before closing the joint
-   Do not add sealant or jointing compound unless the workshop manual for your engine calls for it, and tighten the joint or union to the figure given in that manual
-   Check the joint for weeping once the engine has been run up to temperature and allowed to cool, as many sealing rings only show a leak after a heat cycle

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   11700423 - Stage 1 injection pump
-   20405543 - base shims
-   20881345-20881454 - timing-shim range
-   20405565 - pump mounting flange

### OEM Reman Alternatives

-   3803515 - Volvo Penta exchange injection pump

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
-   Volvo Penta D5A-B TA, D5A-T, D5A-TA
-   Volvo Penta MD2010, MD2010B
-   Volvo Penta TAD520GE, TAD520VE
-   Volvo Penta TAD530GE MECH, TAD530GE EDC4
-   Volvo Penta TAD531GE MECH, TAD531GE EDC4
-   Volvo Penta TAD720GE, TAD720VE
-   Volvo Penta TAD721GE, TAD721VE
-   Volvo Penta TAD722GE, TAD722VE
-   Volvo Penta TAD730GE MECH, TAD730GE EDC4
-   Volvo Penta TAD731GE MECH, TAD731GE EDC4
-   Volvo Penta TD520GE, TD520VE
-   Volvo Penta TD720GE, TD720VE PP
-   Volvo Penta TAD420VE
-   Volvo Penta TAD532GE EDC4
-   Volvo Penta TAD620VE
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TD420VE

## Details

- **Price:** 13.23 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 13.23 AUD | In stock |

## Images

- 20405907 Sealing Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405907-sealing-ring-genuine-volvo-penta)
> Updated: 2026-08-22