Volvo Penta — Hydraulic Steering Nipple — 984379
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Volvo Penta 984379 Hydraulic Steering Nipple
Volvo Penta 984379 is a genuine OEM hydraulic nipple used in power-steering and hydraulic-steering systems. It connects steering-system plumbing at the steering cylinder, hydraulic hose, or steering-pump assembly in selected DPH, DPR, D3, and D4 applications.
Compatible Applications
- DPH-A, DPH-B, DPH-C, and DPH-D1 steering systems
- DPR-A, DPR-B, DPR-C, and DPR-D steering systems
- D3-140A-G electronic-steering systems
- D3-170A-G electronic-steering systems
- D3-200A-G electronic-steering systems
- D3-220A-G electronic-steering systems
- D4-150A-G power-steering systems
Confirm the exact engine or drive model, serial number, steering configuration, and applicable Volvo Penta diagram before ordering. Volvo Penta uses 984379 and 984378 as separate fittings within the same steering assemblies, so they should not be treated as interchangeable.
Part Details
- Brand: Volvo Penta
- Part number: 984379
- Official description: Nipple
- Product type: Hydraulic steering nipple
- System: Hydraulic steering and power steering
- DPH and DPR diagram position: Reference No. 10 in applicable steering-cylinder diagrams
- Typical diagram quantity: One per applicable assembly
Related Parts
- 3863222: Hose
- 3863223: Hydraulic hose
- 984378: Companion nipple at a separate diagram position
- 984376: Plug
- 925053: O-ring
- 3862321: Valve
- 21548739: Hydraulic hose kit
- 21897293: Hydraulic hose in applicable D4-150A-G power-steering assemblies
When to Replace
Replace the nipple if its threads or sealing surfaces are damaged, hydraulic fluid is leaking around the fitting, corrosion is present at the connection, the fitting was distorted during hose removal, or an incorrect substitute was previously installed. When leakage is present, inspect the connected hose, O-rings, and nearby steering components before reassembly.
Installation Notes
Install 984379 only at the diagram position specified for the applicable steering system. Do not assume a thread specification or substitute a generic hydraulic fitting based on visual similarity. Follow the applicable Volvo Penta workshop procedure for installation, tightening specifications, and hydraulic-system bleeding.
Technical FAQ
Is 984379 interchangeable with 984378?
No. They are separate fittings shown at different positions and hose connections in applicable steering diagrams.
Does 984379 fit every DPH, DPR, D3, or D4 installation?
No. Fitment depends on the complete engine or drive designation, steering configuration, serial number, and applicable parts diagram.
Has 984379 been superseded?
No superseding part number is established in the referenced steering assemblies.
Parts Desk Insights
Best use case: Use this genuine fitting where the applicable steering-cylinder, electronic-steering, or power-steering diagram specifies 984379.
Most common mistake: Confusing it with 984378 because both fittings frequently appear side by side in the same steering system.
Fitment guidance: Identify the fitting by its exact diagram position and hose connection, then confirm the engine or drive model and steering configuration.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
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.