21249506 Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine replacement drive gear used in the timing or auxiliary gear train of Volvo Penta TAD5, TAD6 and TAD7 industrial diesel engines.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta D7A-B TA
• Volvo Penta D7A-T
• Volvo Penta D7A-TA
• Volvo Penta D7C-B TA
• Volvo Penta D7C-TA
• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD520VE
• Volvo Penta TAD765VE
• Volvo Penta TAD764VE
• Volvo Penta TAD763VE
• Volvo Penta TAD762VE
• Volvo Penta TAD761VE
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TAD, MD

⚙️ Key Features

• Genuine Volvo Penta engine gear
• Precision tooth profile
• Used in industrial-engine gear trains
• Replaces earlier OEM gear 20900806
• Suitable for continuous heavy-duty operation

🔌 Function

The gear transfers rotational force within the engine gear train to drive the corresponding camshaft, pump or auxiliary component.

⚠️ Common Signs of Failure

• Abnormal gear-train noise
• Chipped or cracked teeth
• Incorrect timing
• Metallic debris in engine oil
• Irregular operation of the driven component

🛠️ Service Notes

• Inspect the mating gear as well as the one being renewed; a chipped or worn tooth on the partner will quickly ruin a new gear, so change them as a pair where the wear is shared
• Check the shaft, bush or bearing the gear runs on for wear and scoring before assembly and renew anything that is not to size
• Fit the gear square and press it home rather than driving it with hammer blows, which spread the bore and mark the teeth
• Oil the teeth and bearing surfaces on assembly so the gear is not run up dry on first start
• Where the workshop manual for your engine gives backlash, end float or timing settings for the gear, set and check them to those figures rather than by feel

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21249506 → Supersedes 20900806 → Supersedes 20512957

OEM / Related Numbers

• 20900806 earlier number superseded by this part
• 20512957 earlier number superseded by this part

📦 Condition

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