1636242 Pulley | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta pulley from the alternator, charging and electric drive group, part number 1636242. It mounts to the alternator shaft and transfers drive from the engine's belt to the alternator rotor so the charging system turns at the correct speed. It is listed for D12 series marine engines along with TWD, TAD and TAMD industrial and genset variants of the same platform.

🚤 Compatibility

• Engine Family: D, TWD, TAD

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1636242
• System group: Alternator, Charging, Electric Motor, Electric Drives
• Net weight 0.28 kg
• Fits D12 series marine engines and TWD/TAD 1240, 1241, 1242, 1620, 1630 and 1631 industrial and generator engines
• Supplied as a single pulley
• Engine type: Volvo Penta TAD12 industrial diesel

🔌 Function

The pulley is driven by the engine's belt and rotates the alternator shaft, allowing the alternator to generate charging current for the batteries and electrical system. Correct pulley diameter and belt seating maintain the alternator's designed speed ratio and belt tension.

⚠️ Common Signs of Failure

• Belt squeal or chirping caused by a worn or glazed pulley groove
• Visible groove wear, chipping or corrosion on the pulley face
• Belt slipping or throwing, leading to low or intermittent battery charging
• Wobble or runout indicating a bent pulley or loose retaining nut
• Rapid or uneven belt edge wear from a misaligned pulley

🛠️ Service Notes

• Inspect the belt running surfaces before fitting — a pulley with glazed, scored, pitted or rust-roughened grooves will chew through a new belt in very little running time
• Check that the pulley runs true and that its bearing or bush turns smoothly with no roughness or side play; fit a new belt whenever a pulley is changed
• Confirm that every pulley in the drive lies in the same plane and that the belt profile matches each groove — misalignment shows up as belt dust, squeal or a worn belt edge and will destroy a new belt quickly
• Fit onto a clean, dry, burr-free shaft or hub face and tighten the retaining fasteners in the sequence and to the figures given in the workshop manual for your engine
• Turn the engine over by hand before starting to confirm the belt is fully seated in every groove and that nothing fouls, then recheck belt tension after the first running period

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 3173821 - related alternator
• 3090711 - related alternator fan
• 865074 - related spacer
• 978207 - related seven-rib belt reference in the installation
• 1676586 - related belt tensioner

Aftermarket / Verified Equivalents

• DT Spare Parts: 2.15206
• Sampa: 033.030
• Auger: 75802
• Unifap: 3.432

📦 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-C MH, D12D-C MP, D12D-E MG, D12D-E MH, D12D-E MP, D12D-F MP, D12D-G MH, D12D-G MP, D12D-H MP
• Volvo Penta TAD1630G, TAD1630GE, TAD1630P, TAD1630PB
• Volvo Penta TWD1630G, TWD1630P, TWD1630PP, TWD1630V
• Volvo Penta TAD1241GE, TAD1241VE, TAD1241-42VE
• Volvo Penta TAD1242GE, TAD1242VE
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAD1240GE
• Volvo Penta TWD1240VE
• Volvo Penta TWD1620G