20555503 Idler Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Idler Gear - Part Number: 20555503

A genuine Volvo Penta idler gear used in the engine timing and gear-train assembly. It is supplied as an individual service component under part number 20555503 and is intended to restore the original fit, sealing, alignment, retention or operating function of the specified assembly. This listing supplies the named component only; adjoining parts are serviced separately.

⚙️ Key Features

• Heat-treated working surfaces support repeated high-load engine operation

• Precision geometry maintains the documented motion, timing or load transfer

• Runs with the specified lubrication supply and matched adjoining components

• Clearance and alignment must be measured during installation

• Replace related bearings, bushings or thrust components where wear is present

• Use the correct Volvo Penta tightening and timing procedure

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20555503 - Current genuine Volvo Penta service reference

OEM / Related Numbers:

• 20555516 - Related Ground Cable

• 20555518 - Related Coolant Pipe

• 20513695 - Earlier water-pipe reference for 20555518

• 20460489 - Air compressor

• 20460484 / 21018602 - Compressor drive-gear references

• 20460467 / 20460466 - O-rings

• 20522574 / 20513915 - Related water and coolant pipes

• 20513688 / 20460400 / 20460398 - Hollow screws

• 20513687 - Bushing

• 20513691 - Adapter

• 20460399 - Rubber hose

• 20460491 - Actuator and companion flange

• 20513651 - Oil line

• 20460465 - Cover

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D5 and D7 industrial diesel engines

• Generator, variable-speed and propulsion packages using the matching serial-controlled assembly

Typically suits:

• Engine models:

• TD420VE

• TAD420VE

• TD520GE

• TAD520GE

• TAD520VE

• TAD530GE EDC4

• TAD530GE MECH

• TAD531GE EDC4

• TAD531GE MECH

• TAD532GE EDC4

• TAD620VE

• TD720GE

• TD720VE

• TAD720GE

• TAD720VE

• TAD721GE

• TAD721VE

• TAD722GE

• TAD722VE

• TAD730GE EDC4

• TAD730GE MECH

• TAD731GE

• TAD732GE

• TAD733GE

• TAD734GE

• TAD750GE

• TAD751GE

• TAD752GE

• TAD753GE

• TAD750VE

• TAD760VE

• Engine Type: Volvo Penta D5/D7 inline industrial diesel family

• HP Range: Determined by the exact engine model and rating

• Year Range: Engine-generation and serial-number controlled

• Serial Applicability: Confirm the complete engine model, serial number and exact assembly position

🔌 Function

Transfers timed rotation through the engine gear train while maintaining correct gear engagement.

Common signs of failure or reasons for replacement:

• The component is cracked, worn, corroded, distorted or missing

• Excessive movement, leakage, noise or vibration develops

• The adjoining components no longer align, seat or operate correctly

• Inspection shows damage beyond the applicable reuse limit

• Replacement is required after disassembly, impact damage or major overhaul

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging