21141948 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Volvo Penta lists this part as the main bearing kit supplied inside its published overhaul kits. It appears in 8 of them: 877645 for TAD520VE (Tier 1); 3843579 for TAD520GE (Tier 2); 3842345 for TD520GE (Tier 1), TAD520GE (Tier 1); 3842346 for TD720GE (Tier 1), TAD720GE (Tier 1); 877646 for TAD720VE (Tier 2), TAD721VE (Tier 2); 3843580 for TAD720GE (Tier 2); 3843791 for TAD721GE (Tier 2), TAD722GE (Tier 2); 3884938 for TAD750VE, TAD760VE.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD
• Serial Range: Std, SN10594935-

Full model list at the end of this description.

⚙️ Key Features

• Standard journal size
• Later serial application from engine SN10594935 onward
• Five main-bearing positions on D5 and seven on D7
• Precision overlay and oil-groove geometry
• One bearing shell/set position supplied according to packaging
• Engine type: Volvo Penta D5 four-cylinder and D7 six-cylinder industrial diesel
• Listed by Volvo Penta as the main bearing kit in its overhaul kits
• 5 off in overhaul kit 877645 (TAD520VE (Tier 1))
• 5 off in overhaul kit 3843579 (TAD520GE (Tier 2))
• 5 off in overhaul kit 3842345 (TD520GE (Tier 1), TAD520GE (Tier 1))
• 7 off in overhaul kit 3842346 (TD720GE (Tier 1), TAD720GE (Tier 1))
• 7 off in overhaul kit 877646 (TAD720VE (Tier 2), TAD721VE (Tier 2))
• 7 off in overhaul kit 3843580 (TAD720GE (Tier 2))
• 7 off in overhaul kit 3843791 (TAD721GE (Tier 2), TAD722GE (Tier 2))
• 7 off in overhaul kit 3884938 (TAD750VE, TAD760VE)
• Used in overhaul kits: 877645 x5 (TAD520VE (Tier 1)); 3843579 x5 (TAD520GE (Tier 2)); 3842345 x5 (TD520GE (Tier 1), TAD520GE (Tier 1)); 3842346 x7 (TD720GE (Tier 1), TAD720GE (Tier 1)); 877646 x7 (TAD720VE (Tier 2), TAD721VE (Tier 2)); 3843580 x7 (TAD720GE (Tier 2)); 3843791 x7 (TAD721GE (Tier 2), TAD722GE (Tier 2)); 3884938 x7 (TAD750VE, TAD760VE)

🔌 Function

Supports the crankshaft journals on a pressurised oil film while controlling radial alignment and oil clearance.

⚠️ Common Signs of Failure

• Deep crankshaft knock
• Copper/metal in the oil
• Excessive journal clearance
• Bearing wiping or seizure after lubrication loss

🛠️ Service Notes

• Replace main bearings as a complete set and never mix new shells with used ones; check that the grade or size supplied matches the crankshaft, which may have been reground
• Fit the shells with dry backs — shell backs and housings must be clean, dry and free of oil, grease and debris so the shell beds fully onto the housing and can carry heat away
• Make sure each shell's locating tang sits in its recess and that the shell is flush with the housing face rather than standing proud
• Never scrape, file, polish or dress a bearing shell and keep abrasives away from it; check the running clearance against the figures in the workshop manual for your engine using a crush-type clearance gauge
• Lubricate the running surfaces with clean engine oil, refit each cap in its original position and direction, tighten in the stages the manual gives, then turn the crankshaft by hand to confirm it is free
• Volvo Penta's overhaul kits call for 5 or 7 off of this part, the count following the number of cylinders

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21141948 → Supersedes 20405516 → Supersedes 11700311

OEM / Related Numbers

• 20405516 earlier number superseded by this part
• 11700311 earlier number superseded by this part
• 0.25 mm undersize 20405529 / 21234191
• 0.50 mm undersize 20405541

Other-Brand OEM Numbers

• VOE21141948
• Deutz 04800194
• Glyco: H0567STD
• Kolbenschmidt: 77689600

Aftermarket / Verified Equivalents

• NE: 180015000800

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TAD750GE, TAD750VE
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD751GE
• Volvo Penta TAD760VE