20405826 Cap | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta service cap fitted to air cleaner 20405836 on the TD520GE Stage 1 / Tier 1 engine. It closes the filter housing and supports filter insert 3840033.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TD520GE
• Volvo Penta TAD420VE
• Volvo Penta TAD520GE
• Volvo Penta TAD520VE

• Engine Family: TD, TAD

⚙️ Key Features

• Air-cleaner housing end cap
• Confirmed specifically for TD520GE
• Used with filter insert 3840033
• Works with dust ejector 20585674
• Must seal and latch securely to the cleaner body
• Engine type: Volvo Penta 5-litre industrial diesel

🔌 Function

Closes the air-cleaner housing and retains the filter element while allowing service removal.

⚠️ Common Signs of Failure

• Dust leakage around the cap
• Broken latch or distorted cap
• Cap not sealing to the housing
• Filter element movement
• Cracks or impact damage

🛠️ Service Notes

• Clean and inspect the seating face on the housing as well as the cap — most leaks past a cap are the seat or the seal rather than the cap body
• Renew any separate O-ring or gasket that goes with the cap, and lubricate rubber seals lightly with clean oil or grease so they slide home instead of rolling or tearing
• Do not over-tighten a cap into a plastic or aluminium housing; it seals on its gasket or O-ring, not on force, and stripped threads mean a much bigger repair
• Where a cap blanks a port during a repair, keep it fitted right up to the moment of assembly so nothing enters the opening
• Check the cap is fully home and that any retaining clip, lanyard or locking tab is secure before returning the boat to service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20405826 - current Volvo Penta TD520GE air-cleaner cap

OEM / Related Numbers

• 20405836 - complete air cleaner
• 3840033 - filter insert, related earlier number 20405827
• 20585674 - dust ejector
• 20514087 - mounting bracket

📦 Condition

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