22081685 Idler Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta TAD1640-42GE-B Timing Idler Gear, part number 22081685. A genuine timing-train idler gear used on Volvo Penta TAD1640-42GE-B generator engines. It replaces earlier gear 20912432.

🚤 Compatibility

• Engine Family: TAD, TWD, D
• Year Range: Approximately 2010 - 2020

Full model list at the end of this description.

⚙️ Key Features

• Precision-machined structural and running surfaces
• Factory geometry for the specified bearing, timing or combustion assembly
• Designed for continuous high-load diesel-engine operation
• Requires correct lubrication, torque and assembly clearances
• Matched to the exact engine generation and serial range
• Engine type: 16.1L inline six-cylinder turbocharged generator diesel

🔌 Function

Supports or transfers the engine's rotating and structural loads while maintaining the specified timing, bearing alignment or cylinder geometry.

⚠️ Common Signs of Failure

• Abnormal gear noise, vibration or loss of timing
• Excessive backlash, bearing movement or bore wear
• Oil, coolant or compression leakage
• Severe engine damage if the component fails in service

🛠️ 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

• 22081685 → Supersedes 22081686 → Supersedes 21284699 → Supersedes 20912432 → Supersedes 20867135 → Supersedes 20864026 → Supersedes 20568441 → Supersedes 20720683 → Supersedes 20555045

OEM / Related Numbers

• 22081686 earlier number superseded by this part
• 21284699 earlier number superseded by this part
• 20912432 earlier number superseded by this part
• 20867135 earlier number superseded by this part
• 20864026 earlier number superseded by this part
• 20568441 earlier number superseded by this part
• 20720683 earlier number superseded by this part
• 20555045 earlier number superseded by this part
• 22438707 - timing-gear plate
• 949656 - O-ring
• 20568561 - shaft
• 914465 - snap rings
• 945504 - snap rings
• 21509046 - related idler-gear references
• 23493799 - related idler-gear references
• 20743007 - related idler gear
• 8131850 - thrust washer
• 21012985 - hub
• 21872746 - cover
• 992065 - O-rings
• 943177 - O-rings
• 22066002 - support bracket

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C-D MH, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
• Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE
• Volvo Penta TWD1683GE-B, TWD1683VE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1644-45GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE
• Volvo Penta TWD1672-1673GE
• Volvo Penta TWD1682-83GE
• Volvo Penta TWD1744GE