955999 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta o-ring included in the repair kit for the operating cylinder and available separately under this number, weighing 0.011 kg and listed for 21 applications across the DPH, DPI, DPR and D ranges.

🚤 Compatibility

• Engine Family: DPH, D, DPI, DPR
• HP Range: 150-440 HP

Full model list at the end of this description.

⚙️ Key Features

• Included in the operating cylinder repair kit
• 0.011 kg
• For DPH, DPI, DPR and D applications
• Available as a single ring

📋 Kit Contents

• Included in repair kit for operating cylinder.

🔌 Function

Seals the operating cylinder joint, squeezed into its groove to hold hydraulic pressure.

⚠️ Common Signs of Failure

• Fluid weeping or dripping at the operating cylinder
• Steering or shift action going heavy, slow or spongy
• Ring flattened, hardened or gone shiny
• Nicks or splits from being pinched on assembly
• Reservoir level falling with no visible external leak

🛠️ Service Notes

• An operating cylinder that has lost fluid should be stripped and checked properly rather than topped up - the repair kit carries the rest of the seals
• O-ring 955975 is the equivalent ring listed for the operating cylinder on the older engine ranges

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• SLP: OR-999

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-330A-F, D6-370A-F, D6-300A-F, D6-300A-G, D6-340A-G, D6-380A-G, D6-400A-G, D6-440A-G, D6-400A-F
• Volvo Penta D4-260A-F, D4-300A-F, D4-225A-F, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G
• Volvo Penta DPH-D1, DPH-E
• Volvo Penta DPI-A
• Volvo Penta DPR-D