20716771 Disc Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta flexible drive-disc kit used with flywheel 21514063 in Allison 4000 transmission installations. The assembled disc pack couples engine flywheel torque into the transmission while accommodating controlled torsional movement. The kit appears in TAD1140-TAD1152 engine flywheel catalogues with ring gear 20711957 and twelve flange screws 21340875. Volvo Penta does not publish separate internal service numbers for the individual disc-pack components.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1180-83VE
• Volvo Penta TAD1170-72VE
• Volvo Penta TAD1150-52VE
• Volvo Penta TAD1140-42VE

• Engine Family: TAD
• HP Range: Approximately 330-550 HP
• Year Range: Approximately 2000s - 2010s

⚙️ Key Features

• Genuine Volvo Penta Allison 4000 flywheel disc kit
• Correct Volvo Penta kit number 20716771
• Used with flywheel 21514063
• Designed for the Allison 4000 transmission installation
• Complete factory-assembled torsional drive-disc package
• Engine type: Volvo Penta 10.8-litre inline 6-cylinder industrial diesel with Allison 4000 transmission

📋 Kit Contents

• 20716771 complete flywheel drive-disc assembly - 1
• 20716771 internal flexible / friction disc elements - factory-assembled set
• 20716771 centre hub and retaining elements - factory-assembled set
• Volvo Penta does not assign separate service part numbers to the internal pieces; the complete assembly is serviced under kit number 20716771
• Flywheel 21514063, ring gear 20711957 and twelve screws 21340875 are related but not included

🔌 Function

The disc assembly transfers engine torque to the transmission input while damping torsional vibration and accommodating small driveline movements.

⚠️ Common Signs of Failure

• Driveline rattles or knocks at idle and load changes
• Transmission engagement produces abnormal vibration
• Disc pack becomes cracked, loose or heat-damaged
• Flywheel-to-transmission drive is lost
• Bolt-hole fretting or hub movement is visible during inspection

🛠️ Service Notes

• Check the kit contents against the parts list for your unit before dismantling, and confirm it is the kit specified for your serial number
• Fit the discs as a complete set and discard the old ones — mixing new and used discs in one pack gives uneven loading and short life
• Keep the discs and their mating faces clean and free of grease and fingerprints, unless the manual specifically calls for them to be oiled or soaked before assembly
• Fit them in the order, orientation and stack sequence the manual gives, and inspect the faces they run against for scoring, heat marking and wear while access is open
• Set clearances and tighten to the workshop manual figures for your unit, then turn the assembly by hand to confirm free movement before running it up

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21514063 related Allison 4000 flywheel
• 20711957 related ring gear
• 21340875 related flange screw - quantity 12, separately serviced
• 3593959 Dana Spicer flywheel and 3840872 ZF flywheel are different transmission arrangements

📦 Condition

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