# 1716S Dunbier A1355 Mackay Two-Part SL Marine Grease Seal | Marine Trailer Part

🔧 Product Description

  

Dunbier Two-Part Slimline Marine Grease Seal - Skin Pack - Part Number: 1716S

  

A two-piece marine hub seal for 45mm and 50mm square slimline axles. One sealing component fits the hub and the mating ring seats on the axle spindle, creating a controlled running surface intended to improve grease retention and water exclusion during repeated boat-launching cycles.

  

⚙️ Key Features

  

• Two-piece marine grease-seal design

• Matched hub insert and spindle mating ring

• Improved water exclusion compared with a basic single-lip seal when correctly installed

• Designed for repeated immersion service

• Service replacement for compatible Dunbier/Mackay axle families

  

📏 Specifications

  

• Axle compatibility: 45mm and 50mm square slimline axles

• Hub compatibility: slimline bearing hubs

• Reference: A1355

• Pack format: skin/display pack

• Both seal halves must be replaced and installed as a matched set

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1716S

• Related complete bearing-and-seal kits are available for the same axle family

• Do not mix one half with a different seal family

  

🚤 Trailer Compatibility & Application

  

• Suits 45mm and 50mm square slimline axles

• Confirm the spindle shoulder, seal journal and hub counterbore match the two-part system

• Not interchangeable with a conventional press-in seal unless the axle and hub were manufactured for conversion

  

🔌 Function

  

Creates a rotating marine grease barrier between the hub and spindle to retain lubricant and reduce water entry.

  

Common signs of wear or replacement:

  

• Grease escapes between the seal faces

• Water contamination returns after hub service

• Stainless mating ring is grooved or loose

• Elastomer section is torn, hardened or distorted

• Seal faces were damaged during hub removal

  

🛠️ Installation & Safety

  

• Remove both old seal components

• Clean and inspect the hub counterbore and spindle journal

• Install each half squarely with the correct drivers

• Pack and adjust the bearings before final assembly

• Check that the hub rotates freely without seal binding

  

📦 Condition

  

• Genuine Dunbier Marine Products trailer component

• Brand new

• Supplied as one matched two-part marine grease-seal set

• Supplied in original or equivalent packaging

## Details

- **Price:** 9.45 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9.45 AUD | In stock |

## Images

- 1716S Dunbier A1355 Mackay Two-Part SL Marine Grease Seal | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1716s-dunbier-two-part-sl-marine-grease-seal-mackay-a1355)
> Updated: 2026-08-03