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