Volvo Penta Rear Trim Cylinder Hydraulic Tube 3862857

Volvo Penta 3862857 – Rear Trim Cylinder Hydraulic Tube

• Part Number: 3862857
• Brand: Volvo Penta (OEM Genuine)
• Official Product Type: Tube – Rear (Trim Cylinder Hydraulic Assembly)
• System: Power Trim / Hydraulic
• Diagram Position: Item 5 in the DPH/DPR Trim Cylinders assembly
• Matching Front Tube: 3862858 (Front Tube – Item 6)
• Used With: Clamp 3863060, O-ring 960214
• Supersedes: No confirmed OEM supersession identified – order by active number 3862857
• Weight: Approx. 0.11 lb (50 g)
• Kit Contents: Rear hydraulic tube only – front tube, clamps, O-rings, and trim cylinders are serviced separately

Important: This is the rear trim cylinder hydraulic tube, not a cooling-water or exhaust pipe. It carries hydraulic fluid in the power-trim circuit. The current title has been corrected to reflect the manufacturer’s schematic placement. Confirm part number 3862857 at diagram position 5 against your drive serial number before ordering.

The 3862857 is a genuine OEM Volvo Penta tube used in the trim-cylinder hydraulic assembly on DPH and DPR sterndrives. Volvo Penta drive documentation identifies it as the “Tube – Rear” (item 5) in the Trim Cylinders assembly, installed alongside front tube 3862858 (item 6), the port and starboard trim cylinders, clamp 3863060, O-ring 960214, and related hydraulic hardware. A correct OEM tube match ensures proper hydraulic routing, sealing, and reliable power-trim operation.

Compatible Applications

• Volvo Penta DPH-A – Trim Cylinders assembly, position 5
• Volvo Penta DPH-B – Trim Cylinders assembly, position 5
• Volvo Penta DPH-C – Trim Cylinders assembly (confirm by serial)
• Volvo Penta DPH-D1 – Trim Cylinders assembly (confirm by serial)
• Volvo Penta DPH-E – Trim Cylinders assembly (confirm by serial)
• Volvo Penta DPR-A – Trim Cylinders assembly, position 5
• Volvo Penta DPR-B – Trim Cylinders assembly, position 5
• Volvo Penta DPR-C – Trim Cylinders assembly (confirm by serial)
• Volvo Penta DPR-D – Trim Cylinders assembly (confirm by serial)
• TSK DPH-A, TSK DPH-B, TSK DPH-E – confirm by serial and diagram

Serial Number Notice: Volvo Penta uses separate front (3862858) and rear (3862857) hydraulic tubes in the trim-cylinder system. Confirm the diagram position, drive model, and serial number before ordering — the two tubes are visually similar and belong to the same assembly.

When to Replace

Replace this tube when it is corroded or heavily pitted, bent, cracked, or physically damaged, leaking from the tube body or sealing connections, internally restricted, or damaged during trim-cylinder or transom-shield service. A damaged hydraulic tube causes fluid loss and unreliable power-trim operation — do not operate the drive with a leaking or damaged tube.

Service Interval

Inspect trim-cylinder hydraulic tubes during annual sterndrive service or any time the trim cylinders or transom shield are disassembled. Replace any tube showing corrosion, cracking, or sealing-surface wear. Proactively replace when adjacent cylinders or O-rings are being serviced to avoid repeat labour.

Associated Service Parts

• Volvo Penta Front Trim Cylinder Tube 3862858 – Matching front tube (Item 6 in same assembly)
• Volvo Penta O-Ring 960214 – Sealing O-ring used with this tube
• Volvo Penta Port Trimming Cylinder 22121309 – DPH/DPR port trim cylinder
• Volvo Penta Starboard Trimming Cylinder 21840806 – DPH/DPR starboard trim cylinder
• Volvo Penta Power Trim Pump Hose Assembly 21721548 – Power trim pump hose assembly

Installation Notes

Confirm diagram position 5 (rear) against position 6 (front tube 3862858) before installation — the two tubes belong to the same assembly and are visually similar. Inspect tube ends, O-rings, clamp 3863060, mating hydraulic connections, and both trim cylinders during service. Replace O-rings and clamps whenever the tube is replaced. Torque all fittings and connections to the specification in the Volvo Penta DPH/DPR service manual for your drive model.

Technical FAQ

Q: Is this a cooling water tube or a hydraulic tube?
A: This is a hydraulic tube in the power-trim circuit, not a cooling-water or exhaust pipe. It was previously misclassified in some catalog references — the Volvo Penta trim-cylinder schematic confirms its correct placement as Item 5 in the Trim Cylinders assembly.

Q: What is the difference between 3862857 and 3862858?
A: The 3862857 is the rear tube (item 5) and the 3862858 is the front tube (item 6) in the same DPH/DPR trim-cylinder hydraulic assembly. They are distinct parts and are not interchangeable.

Q: Which drives use this tube?
A: Confirmed applications include DPH-A, DPH-B, DPR-A, and DPR-B. Additional references associate it with DPH-C, DPH-D1, DPH-E, DPR-C, DPR-D, and TSK DPH variants. Always confirm by your exact drive serial number and diagram.

Q: Do I need to replace the O-ring when replacing the tube?
A: Yes. Always install a new O-ring 960214 when replacing the tube. Reusing old O-rings risks hydraulic fluid leaks after reassembly.

Parts Desk Insights

Best Use Case: This is the correct part for customers replacing a leaking, corroded, or damaged rear hydraulic tube in the DPH or DPR trim-cylinder assembly. It is most often ordered alongside the front tube 3862858, O-rings, and clamps as part of a full trim-cylinder hose and tube service.

Common Issues: The most frequent mistake is confusing this rear hydraulic tube with a cooling-water or exhaust tube — the part was previously listed under cooling/exhaust system references, which is incorrect. It is also easy to order the wrong tube by not checking diagram position: the front tube (3862858) and rear tube (3862857) look similar and sit in the same assembly. Always confirm Item 5 vs. Item 6 against your drive’s parts diagram before ordering.