21579170 Spacer Sleeve | Genuine Volvo Penta Part

🔧 Product Description

A genuine precision spacer sleeve used inside the belt-driven sea-water pump component assembly on selected Volvo Penta D13 marine generator engines. It establishes the correct axial spacing between the shaft, bearing, pulley and retaining components so the pump runs concentrically without side-loading the bearings or seal.

🚤 Compatibility

Typically suits:

• Volvo Penta D13B-E MG
• Volvo Penta D13B-E MG (FE)
• Volvo Penta D13C1-B MG
• Volvo Penta D13C3-B MG
• Volvo Penta D13C1-A MG
• Volvo Penta D13B-N MH
• Volvo Penta D13C1-A MH
• Volvo Penta D13C3-B MH
• Volvo Penta D13C1-B MH

• Engine Family: D
• Year Range: Approximately 2009 - 2020

⚙️ Key Features

• Genuine Volvo Penta pump-component spacer sleeve
• Used in the belt-driven sea-water pump assembly
• Controls shaft and bearing stack position
• Maintains pulley alignment and seal loading
• Direct replacement for the same numbered original sleeve
• Engine type: 12.8L inline six-cylinder turbocharged marine generator diesel

🔌 Function

Provides a fixed stand-off distance within the pump shaft and bearing stack, preserving pulley alignment, bearing preload and mechanical-seal position.

⚠️ Common Signs of Failure

• Pulley wobble or belt misalignment
• Sea-water pump bearing noise
• Repeated mechanical-seal leakage
• Excessive shaft end play
• Fretting, wear or distortion of the sleeve faces

🛠️ Service Notes

• A spacer sleeve sets a fixed length in the joint — never leave one out, shorten one, or substitute a stack of washers, or the clamping load and alignment will both be wrong
• Check that the sleeve is square and fully seated in its counterbore or recess before any fastener is tightened
• Discard a sleeve that is crushed, bell-mouthed, scored or corroded; a shortened sleeve lets the joint be over-clamped and the component distorted
• On sleeves in an oil circuit, make sure the bore is clear and that any seal running on the sleeve has a clean, unscored surface to work against
• Tighten the joint to the figure in the workshop manual for your engine, with the sleeve taking the clamping load rather than the component it protects

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21579159 - related sea-water pump component
• 21579162 - related sea-water pump component
• 21579167 - related sea-water pump component
• 21640396 - related sea-water pump component
• 21165572 - related pump component
• 21165582 - related pump component
• 3829315 - related pump component
• 941907 - associated washer
• 826230 - associated retaining component

📦 Condition

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