20593398 Tensioner | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta tensioner used in the engine auxiliary-belt tensioning system. It is supplied as an individual service component under part number 20593398 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.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD520VE

• Engine Family: TAD

⚙️ Key Features

• Matched belt profile and running diameter for the assigned auxiliary drive
• Hub and mounting interface maintain pulley or fan concentricity
• Designed for the specified belt load, engine speed and cooling demand
• Works with the documented bearings, adapters, fan and retaining hardware
• Correct alignment prevents belt edge wear and bearing overload
• Check run-out, bearing play and tensioner movement during installation
• Engine type: Volvo Penta D5/D7 inline industrial diesel family

🔌 Function

Maintains the correct belt tension as the belt stretches and the engine operates.

⚠️ Common Signs of Failure

• The belt becomes loose or flutters during operation
• Bearing noise or rough movement develops
• The tensioner arm sticks or fails to return
• Repeated belt wear or belt loss occurs
• The pulley is misaligned or the spring force is weak

🛠️ Service Notes

• Renew the tensioner and the belt together, and while the belt is off check the other pulleys for wear, roughness in the bearing and any wobble
• Note the belt routing and the tensioner's mounting position and stops before removing the old unit, and check the new one carries the same pulley and offset
• Locate the tensioner properly on its dowel or stop and tighten it to the workshop manual figures — a tensioner not sitting square will run the belt off line and destroy it
• Wind the tensioner back with the correct tool or square drive, fit the belt over the pulleys by hand and release the tensioner onto it; never lever a belt on with a screwdriver and never use the tensioner arm as a pry bar
• Check every rib or tooth is seated in its groove, turn the engine over by hand, then run it up and recheck belt run and tension after the first period of running, following the procedure for your engine

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20593394 - Related Pulley
• 20593409 - Related Washer
• 20593362 - Related Fan Hub
• 20593473 - Related Strap
• 20593361 - Related Clutch
• 20593474 - Related V-Belt
• 20405987 - Fan-drive adapter references
• 20405988 - Fan-drive adapter references
• 21034597 - Fan-drive adapter references
• 22032282 - Fan-drive adapter references
• 20460331 - Fan references
• 20464440 - Fan references
• 21849998 - Fan references
• 3887296 - Fan references
• 3827487 - Fan references
• 21657224 - Flange
• 21665292 - Additional adapters
• 21200335 - Additional adapters
• 20460319 - Washer
• 20771395 - Belt-tensioner references
• 978467 - Related V-belt sets
• 978489 - Related V-belt sets

📦 Condition

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