1677558 Disc Spring | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta disc spring is a preload-control disc spring used in the camshaft-drive disc spring. It is manufactured to the original Volvo dimensional, material and interface requirements so the serviced assembly retains its designed alignment, sealing, load capacity and operating reliability. In service, it applies controlled axial preload within the camshaft-drive or gear-retaining assembly. Selection must be confirmed by OEM part number 1677558, the exact engine/product model, serial number and the installed assembly configuration.

🚤 Compatibility

• Engine Family: D, TWD, TAD

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1677558
• System group: Engine
• Net weight: 0.027 kg
• Fits D12 marine engines and TAD/TWD industrial and generator-set engines

🔌 Function

A disc spring is compressed on assembly and pushes back against the joint, maintaining preload as components expand, contract or bed in during service. This keeps clamping force stable across temperature and vibration cycles.

⚠️ Common Signs of Failure

• Flattening or loss of free height, indicating the spring has taken a set
• Cracking or fracture across the conical face
• Loss of preload in the assembly the spring serves
• Corrosion or pitting reducing spring section and strength
• Fretting marks on the contact faces from repeated movement

🛠️ Service Notes

• Fit the spring with the correct cone direction — a disc spring's orientation sets its preload, and refitting it the wrong way round changes the clamping force in the camshaft drive
• Measure free height against a new spring before reusing the old one; a disc spring that has taken a permanent set can look sound but no longer hold correct preload
• Confirm the engine designation before ordering — this spring is listed for the D12 and TAD/TWD 1240-1252 range specifically

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D12C-A MP, D12D-A MG, D12D-A MH, D12D-A MP, D12D-B MH, D12D-B MP, D12D-C MH, D12D-C MP, D12D-D MP, D12D-E MG, D12D-E MH, D12D-E MP, D12D-F MP, D12D-G MH, D12D-G MP, D12D-H MP
• Volvo Penta TAD1241GE, TAD1241VE, TAD1241-42VE
• Volvo Penta TAD1242GE, TAD1242VE
• Volvo Penta TAD1250VE, TAD1250-52VE
• Volvo Penta TAD1240GE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TWD1240VE