20778505 Hex. Socket Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Hex. Socket Screw - Part Number: 20778505

Application-specific hex. socket screw used in the engine block, accessory drive and service assembly on the listed Volvo Penta engines. Secures the documented engine-block or accessory-drive component using an internal-hex drive.

⚙️ Key Features

• Genuine Volvo Penta hex. socket screw

• Direct service replacement for part number 20778505

• Designed for the engine block, accessory drive and service assembly

• Secures the documented engine-block or accessory-drive component using an internal-hex drive

• Application family: Four- and six-cylinder turbocharged industrial diesel; Approximately 2003 - 2015

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20778505 (Volvo Penta OEM reference)

OEM / Related Numbers:

• VOE20778505 - Volvo Construction Equipment prefixed number format

• 20460004 - cylinder block

• 20791246 / 21009706 / 22037735 / 22425892 - crankcase references

• 20460006 - main fastener

• 20460001 - block bushing

• 20405716 / 20405718 - plugs

• 20405584 - guide sleeve

• 969011 - gasket

• 20791446 - related sealing kit

• 20555182 / 20940389 - accessory-drive gears

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D5D/D6D/D7D and TAD560/TAD760-series engine assemblies

Typically suits:

• Engine models:

• TAD560VE; TAD561VE; TAD650VE; TAD660VE

• TAD750VE; TAD760VE; TAD761VE; TAD762VE

• HP Range: Approximately 170HP - 300HP

• Engine Type: Four- and six-cylinder turbocharged industrial diesel

• Year Range: Approximately 2003 - 2015

🔌 Function

Secures the documented engine-block or accessory-drive component using an internal-hex drive.

Common signs of failure:

• Rounded drive surfaces or damaged threads

• Stretching, cracking, corrosion or permanent deformation

• Fastener repeatedly loosens or cannot retain the specified torque

• Fretting or movement visible at the joint

• Incorrect seating or clamp load caused by substituted hardware

Service / Installation Notes:

• Confirm thread, length, strength grade and any single-use restriction.

• Use the specified torque, angle and locking method on clean threads.

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging