Volvo Penta Power Steering Pump Pulley 3888078
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Volvo Penta Power Steering Pump Pulley — Part No. 3888078
| Part Number | 3888078 |
| Brand | Volvo Penta |
| Product Type | Power Steering Pulley |
| System | Power Steering |
| Diagram Position | Pulley on the steering pump assembly |
| Supersedes | 3862700 → 3888078 (confirmed); 3860084 (secondary reference — verify via Volvo EPC before substituting) |
| Used With | Volvo Penta steering pump 3884974, mounting brackets, accessory belt, and power steering oil cooler |
This is the OEM power steering pump pulley for selected Volvo Penta gasoline marine engines. The pulley mounts directly on the power steering pump shaft and must be matched to the correct pump assembly and OEM part number — Volvo Penta used different accessory-drive configurations across otherwise similar V6 and V8 engine families.
Compatible Applications
Confirm the complete engine model, suffix, and serial number before ordering. Diagram-confirmed applications:
- 4.3GXi-F
- 4.3GXi-G
- 5.0GXi-F
- 5.0GL-H
Broader catalog references also associate 3888078 with selected:
- 4.3GL
- 5.0GXi / 5.0OSi
- 5.7Gi / 5.7GXi / 5.7OSi / 5.7OSXi
- 7.4Gi / 7.4GSi
- 8.1Gi / 8.1GXi / 8.1OSi
- 8.2GSi
- DPX375 / DPX420 packages
Serial Number Notice
Volvo Penta used multiple steering-pump and pulley combinations across its gasoline engine families. Always confirm the full engine model, suffix, and serial number before ordering — especially on older engines that may still carry the original part number 3862700.
When to Replace This Pulley
Inspect and replace if you observe any of the following:
- Cracks or structural damage
- Bent or distorted pulley faces
- Damaged belt grooves
- Excessive corrosion
- Wobble when rotating
- Belt-tracking problems traced back to the pulley
- Damage from incorrect installation or removal
A worn or damaged pulley accelerates belt wear and can affect overall steering-pump operation.
Installation Notes
During replacement, also inspect the pump shaft, mounting bracket, accessory belt, belt tension, and adjacent pulleys. Install the pulley squarely and to the correct shaft depth so the belt tracks properly. Use the Volvo Penta workshop procedure and the correct pulley installation/removal tool — do not hammer or pry the pulley onto the shaft.
Superseded / Alternate Part Numbers
- Current OEM: 3888078
- Replaces: 3862700
- Secondary reference: 3860084 (verify via Volvo Penta EPC before substituting)
Parts Desk Insights
Best use: This pulley is the correct OEM replacement when inspection confirms pulley damage or wear on the power steering pump assembly. It is a precision steering-system component — not a generic engine accessory pulley — and matching it to the original OEM number and pump assembly is essential.
Common customer issue: Buyers occasionally confuse this pulley with other accessory-drive pulleys on the same engine. Cross-reference the Volvo Penta steering diagram and confirm the part number on your existing pump before ordering. If your engine still shows 3862700 in service records, 3888078 is the current OEM replacement.
Shipping information
In-stock and OEM parts: ship same or next business day.
Supplier-stock items are usually ready for pickup or shipping within 24 hours of ordering.
Special-order timing may vary.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.