# 20586427 Valve Spare Part Kit | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo / Volvo Penta valve service assembly for the closed-crankcase-ventilation oil separator used on selected Volvo and Mack engines and Volvo construction equipment.

## 🚤 Compatibility

-   **Engine Family:** D, TAD, TWD, TWG
-   **HP Range:** Approximately 550 HP
-   **Year Range:** Approximately 2007 onward

Full model list at the end of this description.

## ⚙️ Key Features

-   OEM crankcase-separator valve assembly
-   Installed in separator assemblies including 21122539
-   Controls separator flow and crankcase pressure
-   Also supplied under Mack branding with the same OEM number
-   Internal valve pieces are serviced as one assembly
-   Engine type: Volvo D13 / Mack MP8 6-cylinder diesel crankcase ventilation system

## 📋 Kit Contents

-   1 x separator control / brake valve assembly 20586427
-   Internal valve, spring and sealing elements are not separately service-numbered and are supplied as the complete 20586427 assembly

## 🔌 Function

Regulates vapour flow and pressure through the crankcase oil separator so oil mist can be separated while maintaining controlled crankcase pressure.

## ⚠️ Common Signs of Failure

-   Excessive crankcase pressure
-   Oil mist or oil leakage from breather connections
-   Separator performance deteriorates
-   Valve sticks, leaks or becomes contaminated with sludge
-   Engine records crankcase-pressure or ventilation faults

## 🛠️ Service Notes

-   Fit the internal valve components as the complete assembly into separator housing 21122539 — they are serviced and sold as one piece, not as individual valve parts
-   The same OEM number is catalogued under Mack branding for the shared D13/MP8 crankcase-ventilation system, so if sourcing through a Mack parts channel, match by this number rather than by a Mack-specific description
-   Check separator housing 21122539 for oil-mist fouling or a blocked passage before fitting the new valve, since a contaminated separator will foul a new valve quickly

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   21122539 crankcase separator
-   20763721 earlier separator references
-   20591306 earlier separator references
-   20866262 separator gasket
-   21475228 separator seal kit
-   21475236 separator seal kit

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D13C4-B MH, D13C1-B MH, D13C2-B MP, D13B-E MG, D13B-E MG (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C4-B MP, D13C5-B MP, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C7-B MP, D13C8-B MP, D13C9-A MP
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
-   Volvo Penta TAD1341-43GE-B, TAD1341VE, TAD1341GE
-   Volvo Penta TAD1344-45GE-B, TAD1344VE, TAD1344GE
-   Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
-   Volvo Penta TAD1342VE, TAD1342GE
-   Volvo Penta TAD1343VE, TAD1343GE
-   Volvo Penta TAD1345GE, TAD1345VE
-   Volvo Penta TAD1350GE, TAD1350VE
-   Volvo Penta TAD1340VE
-   Volvo Penta TAD1346GE
-   Volvo Penta TAD1351GE
-   Volvo Penta TAD1352GE
-   Volvo Penta TAD1353GE
-   Volvo Penta TAD1354GE
-   Volvo Penta TAD1355GE
-   Volvo Penta TAD1360-62VE
-   Volvo Penta TAD1363-65VE
-   Volvo Penta TAD1643VE
-   Volvo Penta TAD1650GE
-   Volvo Penta TAD1651GE
-   Volvo Penta TWD1643GE
-   Volvo Penta TWD1652GE
-   Volvo Penta TWD1653GE
-   Volvo Penta TWD1663GE
-   Volvo Penta TWG1663GE

## Details

- **Price:** 583.87 AUD
- **Vendor:** Volvo Penta
- **Type:** Oil & Lubrication
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 583.87 AUD | In stock |

## Images

- 20586427 Valve Spare Part Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20586427-valve-spare-part-kit-genuine-volvo-penta)
> Updated: 2026-09-01