1543917 Idler Gear | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta idler gear from the Engine group, used in the timing gear train of the 16-litre TWD, TID, TAD and TAMD engine families. It transfers drive between the crankshaft gear and the driven gears, maintaining correct timing and rotation direction within the gear train. This part number supersedes the earlier idler gear 1543445.

🚤 Compatibility

• Engine Family: TWD, TID, TD, TAMD, TAD
• HP Range: Approximately 468-770 HP
• Year Range: Approximately 1987-2005

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 1543917
• System group: Engine
• Net weight 4.12 kg
• Supersedes and replaces earlier part number 1543445
• Fits TWD1620G/1630, TID162, TD164, TAD1630/1631 and TAMD162/163/165 series engines
• Engine type: 16.1L inline-six turbocharged/aftercooled diesel

🔌 Function

The idler gear sits between driving and driven gears in the engine's timing gear train, transmitting rotation while maintaining correct gear spacing and timing relationship. It also sets the direction of rotation for the gears it drives, such as camshaft, pump or accessory drives.

⚠️ Common Signs of Failure

• Whining, growling or rattling noise from the timing gear area that changes with engine speed
• Excessive backlash or visible play when the gear is rocked by hand
• Chipped, pitted or worn gear teeth found during inspection
• Metal debris or gear tooth fragments in the oil or oil filter
• Timing drift or erratic drive to camshaft and pump accessories

🛠️ Service Notes

• Inspect the gear teeth, the bearing or bushing and the shaft or hub it runs on together — a new gear on a worn shaft will be noisy and short-lived
• Check the mating gears at the same time; a chipped or pitted tooth on either side will damage the new idler
• Where the gear forms part of a timed drive, set it up to the timing marks and the procedure in the workshop manual for your engine and confirm timing before turning the engine over
• Measure backlash and endfloat by the method in the manual rather than judging them by feel, and fit any thrust washer or plate in its original order and direction
• Oil the bearing surfaces and teeth on assembly and turn the drive over by hand to check it runs free before the covers go back on

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1543917 → Supersedes 1543445

OEM / Related Numbers

• 1543445 earlier number superseded by this part
• 1543897 upper idler gear
• 1543799 idler spindle
• 1543901 bearing shield
• 1556593 fuel-injection-pump idler bearing shield
• 1543597 pin
• 914459 snap ring

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD162C-C, TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
• Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TAD1630G, TAD1630GE, TAD1630P
• Volvo Penta TAMD165A, TAMD165C, TAMD165P
• Volvo Penta TWD1630G, TWD1630P, TWD1630V
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TAMD163A-A, TAMD163P-A
• Volvo Penta TD164KAE
• Volvo Penta TWD1620G