1688S Dunbier A1350 Mackay Bearing Set LM and Two-Part Seal Skin Pack | Marine Trailer Part

🔧 Product Description

Dunbier LM Bearing Set with Two-Part Marine Seal - Skin Pack - Part Number: 1688S

A matched tapered-roller wheel-bearing service set for 39mm round and 40mm square Dunbier axles. The inner and outer bearing cones and cups are supplied with the specified hub seal so the complete bearing position can be renewed using components matched to the Dunbier axle family.

⚙️ Key Features

• Matched inner and outer tapered-roller bearings

• Includes the specified grease seal

• Designed for marine-trailer hub service

• Suitable for preventive maintenance or full bearing replacement

• Correct bearing family preserves spindle and hub fit

📏 Specifications

• Axle family: 39mm round and 40mm square Dunbier axles

• Included bearings: LM67048 cone / LM67010 cup and LM11949 cone / LM11910 cup

• Included seal: two-part LM marine seal 1715 / Mackay A1354

• Pack format: skin/display pack

🔄 Cross Reference & Related Parts

• Dunbier: 1688S

• Mackay: A1350

• Bearing components: LM67048 cone / LM67010 cup and LM11949 cone / LM11910 cup

• Seal reference: two-part LM marine seal 1715 / Mackay A1354

• Standard-seal LM set: Dunbier 1690S

• Bulk two-part-seal kit is catalogued separately for workshop use

🚤 Trailer Compatibility & Application

• Suits 39mm round and 40mm square Dunbier axles

• Confirm existing bearing numbers before dismantling where the trailer history is unknown

• Hub, spindle, seal journal and dust-cap dimensions must remain serviceable

🔌 Function

Supports the rotating hub on the fixed axle spindle while the seal retains grease and helps exclude water and road contamination.

Common signs of wear or replacement:

• Bearing rumble, roughness or heat at the hub

• Pitting, blue heat marks or corrosion on rollers and races

• Grease contaminated with water or metallic particles

• Excessive hub end float that cannot be adjusted correctly

• Seal leakage or water entry after launching

🛠️ Installation & Safety

• Replace bearing cups and cones as matched sets

• Clean the hub thoroughly and inspect the spindle before assembly

• Pack bearings completely with suitable wheel-bearing grease

• Install the seal squarely without damaging its lip or stainless mating ring

• Adjust bearing preload and fit a new axle split pin before road use

📦 Condition

• Genuine Dunbier Marine Products trailer component

• Brand new

• Supplied as one skin/display pack bearing-and-seal set

• Supplied in original or equivalent packaging