478296 Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta gear marked Nitro, from the Engine group, weighing 0.329 kg and listed for 50 applications across the TD, TAMD, TWD, TID and TAD series.

🚤 Compatibility

• Engine Family: TD, TAMD, TWD, TID, TAD

Full model list at the end of this description.

⚙️ Key Features

• Marked Nitro
• 0.329 kg
• 50 applications across five engine series
• Gears 478429 and 478777 in this range also carry the Nitro marking

🔌 Function

Transmits drive through the timing train, keeping the driven shafts in phase with the crankshaft.

⚠️ Common Signs of Failure

• Whine or growl from the timing end that follows engine speed
• Rattle at idle that quietens under load
• Bright metal flakes in the oil filter
• Teeth found pitted, chipped or worn to a step
• Backlash outside specification when measured at the gear

🛠️ Service Notes

• The Nitro marking is the specification that separates this gear from otherwise similar ones, so quote it when ordering
• Inspect the mating gears and the shaft or bearing for matching wear and set backlash on assembly

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TD61A, TD61ACE, TD61AG, TD61AGP, TD61AP, TD61APB, TD61AW
• Volvo Penta TD71A, TD71ACE, TD71AG, TD71AGP, TD71AP, TD71APB, TD71AW
• Volvo Penta TID71A, TID71AG, TID71AGP, TID71AP, TID71APB
• Volvo Penta TAMD63L-A, TAMD63P-A
• Volvo Penta TAMD73P-A, TAMD73WJ-A
• Volvo Penta TD610M, TD610V
• Volvo Penta TD630ME, TD630VE
• Volvo Penta TD730ME, TD730VE
• Volvo Penta TID61AG, TID61AGP
• Volvo Penta TWD630ME, TWD630VE
• Volvo Penta TAD730V
• Volvo Penta TAMD75P-A
• Volvo Penta TD121G-87
• Volvo Penta TD640VE
• Volvo Penta TID121K-87
• Volvo Penta TWD610V
• Volvo Penta TWD710V
• Volvo Penta TWD730ME
• Volvo Penta TWD731VE
• Volvo Penta TWD740VE