21139678 Shaft | Genuine Volvo Penta Part

🔧 Product Description

Brand-new genuine Volvo Penta transmission shaft used inside the IPS-A clutch and gear-set assembly. The precision-ground shaft carries the clutch/gear components and transmits torque through the hydraulic marine-drive gear train.

🚤 Compatibility

• Engine Family: D, IPS
• HP Range: 260-435 HP

Full model list at the end of this description.

⚙️ Key Features

• Precision-machined IPS gearbox shaft
• Hardened bearing and spline surfaces
• Used with gear set 3840695 and disc kit 3841460
• Correct shoulder and thread geometry for round nut 969073
• Internal drive component requiring specialist transmission assembly
• Engine type: Volvo Penta IPS hydraulic marine propulsion drive

🔌 Function

Supports and transmits torque between the clutch pack and reduction gears while maintaining accurate bearing and gear alignment.

⚠️ Common Signs of Failure

• Metallic gearbox noise
• Excessive shaft end-float or radial play
• Worn splines or bearing journals
• Clutch debris or metal in the oil
• Loss of drive or gear damage

🛠️ Service Notes

• Handle and store the shaft so the bearing journals and seal running surfaces stay unmarked — a nick on a seal track will cause a leak that no new seal will cure
• Remove the protective coating and check the shaft for straightness, scoring, pitting and stepped wear at the journals, splines and seal areas before fitting
• Lubricate journals, splines and seal surfaces with clean oil of the grade specified for the assembly as it goes together, and renew the seals and any single-use nuts or locking devices disturbed on removal
• Draw bearings and couplings on square with a press or drawing tool that loads only the correct race — hammering a bearing onto a shaft marks the races and can distort the shaft
• Set end float, backlash and shim thickness to the values in the workshop manual for your unit, then turn the assembly by hand to confirm it is free before applying power

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21139678 → Supersedes 3595153 → Supersedes 3883506 → Supersedes 3861191

OEM / Related Numbers

• 3595153 earlier number superseded by this part
• 3883506 earlier number superseded by this part
• 3861191 earlier number superseded by this part
• Gear set 3840695
• Disc kit 3841460
• Round nut 969073

Other-Brand OEM Numbers

• VOE21139678

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-330D-E, D6-370D-E, D6-330D-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-310D-D, D6-310D-C, D6-310D-E, D6-435D-D, D6-435D-E, D6-435D-C
• Volvo Penta D4-260D-C, D4-260D-D, D4-260D-E, D4-300D-C, D4-300D-D, D4-300D-E
• Volvo Penta IPS-A, IPS-B, IPS-C
• Volvo Penta 8.1IPSCE-MF