20553855 Air Vent Pipe | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta air vent pipe is an OEM service component used in the Fuel-System Air-Vent Pipe. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 9-litre TAD9 generator diesel application. Technical identification: Air-vent pipe in the TAD940GE fuel-system assembly; catalogue key 14. In service, it routes crankcase vapour, separated oil mist or trapped air through the specified ventilation circuit so pressure remains controlled and fluid flow is not interrupted. Selection must be confirmed by OEM part number 20553855, the exact model/product number, serial number and installed assembly configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD943VE
• Volvo Penta TAD952VE
• Volvo Penta TAD951VE
• Volvo Penta TAD950VE
• Volvo Penta TAD940GE
• Volvo Penta TAD940VE
• Volvo Penta TAD941VE
• Volvo Penta TAD941GE
• Volvo Penta TAD942VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta OEM air vent pipe
• OEM part number 20553855
• Technical distinction: Air-vent pipe in the TAD940GE fuel-system assembly; catalogue key 14

🔌 Function

Routes crankcase vapour, separated oil mist or trapped air through the specified ventilation circuit so pressure remains controlled and fluid flow is not interrupted. Install without twist or preload, renew the specified seals/clamps, preserve the original routing and pressure- or leak-test the circuit after assembly.

⚠️ Common Signs of Failure

• Excessive crankcase pressure or oil pushed from seals and dipstick
• Oil mist, wetness or leakage around the breather assembly
• Blocked pipe or separator causing unstable ventilation
• Increased oil consumption or smoke caused by oil carry-over
• Cracked, hardened, collapsed or poorly retained breather pipe

🛠️ Service Notes

• A vent line must run continuously uphill to its high point with no dips or sags that can trap fluid, or the system will not self-vent
• Check that the bore and any restriction or fitting at each end is completely clear; these lines block with scale and debris, and the symptom is persistent air in the system
• Renew the seals, unions and clips, route the pipe clear of hot and moving parts, and support it so it cannot chafe or fatigue
• Do not kink or sharply bend the pipe, force it into place, or substitute a different length or bore
• Refill, vent and run up, then check the joints for weeping and confirm the system holds pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20553855 → Supersedes 20440396

OEM / Related Numbers

• 20440396 earlier number superseded by this part

📦 Condition

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