20860794 Gear | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta crankshaft-mounted drive gear used in the engine timing and auxiliary gear train. The gear's tooth form, pitch diameter and mounting relationship are produced to maintain the exact phase and backlash required between the crankshaft and the mating gears.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD560VE
• Volvo Penta TAD561VE
• Volvo Penta TAD734GE
• Volvo Penta TAD752GE
• Volvo Penta TAD753GE
• Volvo Penta TAD754GE
• Volvo Penta TAD765VE
• Volvo Penta TAD764VE
• Volvo Penta TAD763VE
• Volvo Penta TAD762VE
• Volvo Penta TAD761VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta Crankshaft Drive Gear - part number 20860794
• Precision-machined crankshaft gear for the original gear train
• Correct tooth profile and pitch for the mating timing/drive gears
• Maintains camshaft, pump or auxiliary drive phase as specified
• Heat-treated working surfaces resist pitting and flank wear
• Mounting bore and locating feature preserve crankshaft concentricity
• Gear timing marks and specified installation procedure must be followed
• Engine type: D5/D7-series crankshaft and engine gear-train installations

🔌 Function

The gear takes rotary motion directly from the crankshaft and transfers it into the engine gear train. Because the crankshaft is the timing reference for the entire engine, tooth position and backlash at this gear directly affect valve timing, fuel-system drive and accessory operation.

⚠️ Common Signs of Failure

• Abnormal gear whine, rattle or impact noise
• Pitted, chipped or polished tooth flanks
• Excessive backlash or metal debris in the lubricating oil
• Timing marks no longer align after gear movement
• Loose fit, fretting or damage at the crankshaft mounting interface

🛠️ 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

Other-Brand OEM Numbers

• VOE20860794

📦 Condition

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