Every heavy vehicle technician knows the job: an air disc brake rotor that simply will not come off the hub. Winter road chemicals and moisture work their way between the components, corrosion sets in, and a ten-minute task becomes a struggle. The HR Splitter Mate™ from All Ma Mates® is designed to take that struggle out of the job.

This guide covers why hubs and rotors seize, what the HR Splitter Mate™ does, its published features, and how it fits into a safer, faster brake service.

Why hubs and rotors seize on air disc brakes

On trucks, trailers, and buses, the hub and rotor sit in one of the harshest places on the vehicle. Road salt and other winter chemicals, along with moisture, collect around the joint where the two parts meet. Over time, that buildup bonds them together. According to All Ma Mates®, these conditions can “wreak havoc” on the components, leaving them seized or very difficult to separate.

The usual answers are rough ones: a sledgehammer, a shop press, or heat. Each carries risk, including damaged components, wasted time, and technician injury.

What is the Heavy-duty Truck HR Splitter Mate™?

The HR Splitter Mate™ is a hydraulic tool built to separate hubs and rotors on air disc brakes that have become seized. It works on any flat surface, and the manufacturer states it can take less than two minutes to separate the components. It can also be used as a standalone unit.

That means no more sledgehammers, shop presses, or heat to separate seized hubs and rotors.

Key features at a glance

Based on the manufacturer’s published specifications, the HR Splitter Mate™ offers:

• European and USA models: so it can match the hub and rotor styles in your fleet.
• Three hydraulic pistons, each rated for 10,000 PSI.
• Individual valves for direct control of each piston.
• Optional hydraulic control foot pedal for easier operation.
• Standalone use, or integration with your existing brake maintenance equipment.
• Use on any flat surface, so no special setup is needed.

The benefits for your shop

Faster repair times

Time lost to a seized rotor is time a truck is off the road. By reducing the effort of rotor and brake separation, the HR Splitter Mate™ helps shorten the repair, which supports the goal of getting vehicles back into service sooner.

Better safety for technicians

Swinging a sledgehammer at a seized component, or working with heat around brake parts, puts people at risk. A hydraulic tool that applies controlled force replaces those methods and brings occupational health and safety (OH&S) benefits, including reduced injuries and improved worker safety.

Control over the process

With three hydraulic pistons and individual valves for direct piston control, the technician manages how force is applied, instead of relying on brute strength. The optional foot pedal frees the hands to position and monitor the components.

Flexibility in the shop

Because the unit can be used on its own or integrated with brake maintenance equipment, it suits both a simple service bay and a shop with a full brake-service setup.

Where it fits in a brake service

A typical job might look like this:

1. Remove the wheel and caliper following your shop’s procedures and the manufacturer’s service instructions.
2. Position the hub and rotor assembly on a flat surface with the HR Splitter Mate™.
3. Apply controlled hydraulic force using the valves, or the optional foot pedal, to separate the rotor from the hub.
4. Inspect the components, then clean and prepare mating surfaces before reassembly.

Always follow the vehicle manufacturer’s guidance and your own safety procedures.

Building a complete wheel end toolkit

Seized rotors are one of several common wheel end headaches. Other All Ma Mates® tools address the rest of the job:

• The NutMate™ is a hydraulic wrench for removing seized nuts and bolts.
• The StudMate™ cleans lug studs and mating surfaces for accurate torque.
• The Rotor-N-Drum Mate® helps technicians lift and position calipers without straining.

Together they reflect the company’s approach: tools developed by technicians, for technicians, to make heavy vehicle wheel end work easier and safer.

Support behind the tool

According to All Ma Mates®:

• Warranty: a two-year limited warranty, with equipment registered within 30 days of receipt. See the Warranty Statement for details.
• Training: training videos, online sessions, and phone support, with in-shop training on request (additional fees may apply).
• Parts: replacement parts stocked in Canada and the USA, normally shipping within 3 business days.
• Industry standing: a proud member of the South West Transport Association and a Corporate Alliance Partner of the International Motorcoach Group.

Frequently asked questions

• What does the HR Splitter Mate™ do?
  It separates hubs and rotors on air disc brakes that are seized or difficult to separate.
• How long does it take?
  The manufacturer states it can take less than two minutes to separate the components.
• Can it be used on its own?
  Yes. It works as a standalone unit or can be integrated with brake maintenance equipment.
• Is there a foot pedal option?
  Yes, an optional hydraulic control foot pedal is available.
• Are there different models?
  European and USA models are available.

Final thoughts

Seized hubs and rotors slow down service, damage components, and put technicians at risk when handled with hammers, presses, or heat. The HR Splitter Mate™ replaces those methods with controlled hydraulic force, three 10,000 PSI pistons, individual valve control, and a design that works on any flat surface. For shops and fleets servicing air disc brakes, it is a practical way to save time and protect people.

Interested in adding the HR Splitter Mate™ to your shop? Demander un devis, call +844-465-6283 (Mon-Fri, 8:00 am-4:00 pm EST), or email info@allmamates.com.