Volvo Penta Lock Ring 872522

Volvo Penta Lock Ring 872522

Volvo Penta 872522 is a genuine OEM retaining ring used to secure internal components within Volvo Penta gear sets and driveline assemblies. It provides positive mechanical retention, preventing axial movement of components under load and helping keep the assembly properly aligned.

Key Features

• Genuine Volvo Penta OEM lock ring
• Secures internal components against axial movement and separation
• Hardened spring-steel construction
• Built for high-load marine driveline environments
• Direct OEM replacement

Compatible Applications

• Volvo Penta diesel engines: AD31, TAMD31, TAMD41, KAD42, KAMD42
• Volvo Penta propulsion systems: DPI-A, IPS series, HS1 transmissions
• Used in gear-set and reverse-reduction gear assemblies alongside internal components such as piston rings, disc springs, and thrust washers

Serial Number Fitment Notice

Lock rings are size- and groove-specific. Confirm compatibility using the engine or drive serial number before ordering.

When This Part Needs Replacement

• Loss of retention or looseness in the assembly
• Deformation or loss of spring tension
• Corrosion or wear
• During a gear or driveline rebuild
• Preventative replacement during major service

Installation Notes

• Ensure proper seating in the groove
• Do not reuse a distorted or stretched ring
• Use correct snap-ring pliers for installation
• Inspect the groove and mating components
• Confirm full engagement before assembly

Related Parts

Often used alongside piston ring 872563, thrust washer 872570, and disc spring 872794.

Parts Desk Insights

Best use case: Replacing this ring during any gear or driveline teardown rather than reusing the original, since a failed or improperly seated ring can let an entire gear assembly shift and cause further damage.

Most common mistake: Reinstalling a distorted or stretched ring, or reusing one after disassembly instead of replacing it.

Sizing/fitment guidance: Lock rings are size- and groove-specific, so confirm fitment against your engine or drive serial number before ordering rather than matching by appearance.