A1585G Mackay Centre Load Sharing Spring Rocka Arm | Marine Trailer Part

🔧 Product Description

Genuine Mackay Marine Trailer Products Galvanised Centre Load-Sharing Rocka Arm – Part Number: A1585G

A central rocker/equaliser arm for Mackay tandem load-sharing spring suspension. The Rocka arm pivots between the front and rear springs, transferring load as either axle moves over uneven road surfaces.

⚙️ Key Features

• Heavy-duty load-sharing equaliser design
• Galvanised marine-trailer finish
• Centre pivot accepts the matching greaser bolt and bush
• Connects the adjacent spring ends in a tandem suspension
• Replacement for bent or worn original rocker arms

📏 Specifications

• Suspension type: Mackay Rocka/load-sharing tandem spring
• Centre bolt and spring-end bolts are supplied separately unless stated
• Pivot-hole and spring-eye spacing must match the original arm

🔄 Cross Reference & Related Parts

• Centre greaser bolt: Mackay A1590
• Steel Rocka bush: Mackay A1578
• 5/8-inch load-sharing spring bolts: Mackay A1570, A1572 and A1580

🚤 Compatibility & Application

• Compatible Mackay tandem Rocka suspension
• Install in the original orientation
• Check spring lengths, hanger spacing and axle alignment
• Grease the centre pivot at scheduled intervals
• Replace left and right worn suspension components as required to maintain equal geometry

🔌 Function

Equalises load between the front and rear trailer axles by rocking as the spring ends move.

⚠️ Common Signs of Failure

• Centre or spring-end holes are elongated
• Arm is bent, cracked or twisted
• Suspension clunks or one axle carries disproportionate load
• Pivot bush or bolt is seized
• Galvanising is lost and structural corrosion develops

📦 Condition

• Genuine Mackay Marine Trailer Products part
• Brand new
• Supplied in original or equivalent packaging