12.25″×5″, 12,000 lbs, 7-Bolt Hydraulic Trailer Brake Assembly

Key Features

Hydraulic drive for stronger and more linear braking under heavy loads
The 12-inch design features an enlarged braking friction surface to enhance resistance to thermal degradation.
Adjust the brake clearance manually to reduce daily adjustment workload
Overloaded and thickened structure for impact and corrosion resistance.

Product Overview

The 12KH heavy-duty hydraulic drum brake is designed for 12K-class heavy trailers, construction machinery trailers, and heavy-duty RVs. Operated by hydraulic oil pressure, it delivers high braking torque and excellent braking linearity, featuring a 12-inch oversized brake drum with self-adjusting brake shoes, making it ideal for heavy towing, long-distance freight transport, and engineering applications.

Core Specification

project	Specification Details
specified load	12000LB
type	12-inch drum hydraulic brake (oil brake; self-adjusting drum brake for heavy loads)
caliber	4.5-inch (114 mm) thick circular tube with heavy-load bearing beam
Process Flow	Cast molding → Precision machining → Heat treatment for strengthening → Electroplating and hot-dip galvanizing for corrosion resistance → Hydraulic sealing performance and brake torque testing before shipment
Hub nut	Eight-hole heavy-duty wheel hub kit
customization	Supports customizing CAD/DWG drawings

Matters Need Attention

Included Parts

2×12K pre-lubricated heavy-load bearing kits
12-inch wheel hub + hydraulic brake assembly (8-hole hub)
4.5-inch heavy-load shaft beam
9/16–18 wheel hub nuts, hydraulic oil pipe fittings, sub pump assemblies

Heavy-duty freight trailers, engineering trailers, and large heavy-duty recreational vehicles
Heavy-duty agricultural work trailers; construction site flatbed trailers
Modification or replacement of the hydraulic braking system for 12K heavy-duty axles

Maintain (Service)

After use in rainy or snowy conditions with muddy surfaces, clean the exterior of the brakes of accumulated mud and sand, and inspect the oil lines for leaks.
Perform quarterly inspections of brake shoe wear, hydraulic sub pump sealing integrity, spring elasticity, and hub sealing.
Overloading or excessive weight during operation is prohibited to prevent damage to the shaft and braking components due to overload.
Replace brake fluid regularly and apply lubricating grease to the bearings.

Overloaded hydraulic braking structure with stable braking performance

Corrosion-resistant and wear-resistant treatment, ensuring high durability under outdoor conditions

Modular assembly for easy disassembly and maintenance

Reduce driving vibrations for safer towing

Adapted for modification of various heavy-duty trailer chassis.

Reduce long-term maintenance costs