21245957 Crankshaft | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D7/TAD7 Crankshaft - Part Number: 21245957

A complete precision-forged crankshaft used in later-production Volvo Penta D7, TAD7 and TD7 diesel engines. It supersedes multiple earlier crankshaft references through documented engine serial breaks.

⚙️ Key Features

• Genuine Volvo Penta component

• Precision-ground main and connecting-rod journals

• Later service replacement in a multi-stage supersession chain

• Supports standard and undersize service bearings

• Direct replacement where part number 21245957 is specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21245957 → Supersedes 20790461 → Supersedes 20724015 → Supersedes 20412323

OEM / Related Numbers:

• 21141948 - standard main bearing

• 21234191 - 0.25 mm undersize main bearing

• 20405541 - 0.50 mm undersize main bearing

• 20405899 - thrust-bearing kit

Aftermarket / Verified Equivalents:

• No fully documented direct aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D7, TAD7 and TD7 industrial or marine diesel engines

Typically suits:

• Engine models:

• D7A-B TA

• D7A-T

• D7A-TA

• D7C-B TA

• D7C-TA

• TAD520VE

• TAD720GE

• TAD720VE

• TAD721GE

• TAD721VE

• TAD722GE

• TAD722VE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• TAD750GE

• TAD750VE

• TAD751GE

• TAD760VE

• TD720GE

• TD720VE

• HP Range: Engine-rating dependent

• Engine Type: Six-cylinder turbocharged diesel

• Year Range: Later production with individual serial transitions

🔌 Function

Converts piston movement into rotational power and transmits engine torque to the flywheel.

Common signs of failure:

• Deep crankcase knock

• Low oil pressure

• Cracked or scored journals

• Excessive crankshaft end float

• Repeated main or connecting-rod bearing failure

• Abnormal engine vibration

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging