21351381 Crankshaft | Genuine Volvo Penta Part

🔧 Product Description

Genuine crankshaft for Volvo Penta D4D and TAD420VE industrial diesel engines. The crankshaft belongs to a documented Volvo OEM family and has a verified Swedish Lorry Parts replacement.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD420VE

• Engine Family: TD, TAD
• Serial Range: SN10803389-

⚙️ Key Features

• D4D and TAD420VE application
• Precision-ground main and big-end journals
• Factory oil passages and counterweight balance
• Full Volvo OEM reference family

🔌 Function

The crankshaft transfers combustion force from the pistons into rotary engine output and drives the timing and accessory systems.

⚠️ Common Signs of Failure

• Main or big-end bearing knock
• Excessive crankshaft end float
• Scored journals
• Cracks or heat discolouration
• Abnormal engine vibration

🛠️ Service Notes

• Fitting a crankshaft is a full bottom-end job — the block, bearing housings and oil ways all want checking, and the journals measuring for size, taper and ovality, before anything is assembled
• Wash out every oil way in the new shaft and blow it through; swarf or preservative left in a gallery will destroy the new bearings
• Fit new main and big-end shells and thrust washers, and check running clearance and crankshaft end float against the figures in the workshop manual for your engine rather than assuming they are right
• Oil the shells and journals on assembly, tighten the bearing caps in the sequence and to the tightening figures and angles specified for your engine, and turn the shaft by hand after each cap to confirm nothing binds
• Renew the front and rear crankshaft seals, inspect the flywheel, damper, pulley and their fasteners while the access is good, then prime the lubricating system and confirm oil pressure before the engine is run up under load

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21351381 → Supersedes 20891184 → Supersedes 20744682 → Supersedes 20729184 → Supersedes 20555340 → Supersedes 20459150

OEM / Related Numbers

• 20891184 earlier number superseded by this part
• 20744682 earlier number superseded by this part
• 20729184 earlier number superseded by this part
• 20555340 earlier number superseded by this part
• 20459150 earlier number superseded by this part

Aftermarket / Verified Equivalents

• Swedish Lorry Parts: VAX-184

📦 Condition

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