Caterpillar forklift brake master cylinders are one of the most critical elements in your braking system. If it malfunctions, your entire brake mechanism could be at risk.
The master cylinder transforms non-hydraulic pressure from your brake pedal into hydraulic pressure for your calipers to engage and stop your wheels. It also manages pressure distribution between front and rear brakes for balanced, reliable braking.
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Internal Leaks
If your caterpillar forklift master cylinder is showing signs of internal leaks, having it examined by a professional mechanic is recommended. Such issues can cause the forklift to lose braking power and decrease its ability to stop quickly – potentially putting workers and others on the road in jeopardy.
Caterpillar forklift master cylinders have two pistons that work in concert to apply pressure to the braking system. Each piston features a lip/cup seal which prevents fluid from escaping from its pressure chamber.
Pistons also feature a “breather” port that allows brake fluid to flow into the cylinder as the driver depresses their foot on the pedal. Furthermore, master cylinder bores have compensation ports which bleed air bubbles from within the bore into its reservoir.
If your caterpillar forklift master cyclinder is leaking hydraulic fluid, it can be challenging to identify the source. While de-pressurizing the brake system and inspecting for leaks may help if you’re experienced enough, consulting a professional is recommended.
Dark Colored Brake Fluid
If it has been some time since your brakes have been serviced, chances are the fluid has turned dark. While this doesn’t necessarily indicate a problem, dark fluid could indicate an underlying issue with your system.
Brake fluid is a hydraulic liquid that transfers the force of your foot hitting the brake pedal to the calipers or wheel cylinders. As pressure builds on these discs, they apply pressure to pads or shoes which in turn apply friction on rotors or drums to slow your car down.
Aside from brake fluid, several factors contribute to the effectiveness of your braking system. One important element is the quality and condition of your rubber brake lines – though they may last for years, they eventually need replacing due to moisture content or shavings from inside calipers or brake lines. To guarantee that everything works optimally, bring your vehicle into our shop for an expert checkup!
Uneven Brake Pad Wear
When the brake pedal is depressed, pressurized fluid is sent to each of four calipers in a caterpillar forklift brake master cylinder. Each caliper applies even amounts of brake force on the rotors when depressed.
When caliper guide pins or bushings become corrosiond or the piston boots become stuck, the caliper will move in an irregular pattern. This puts uneven pressure on the friction material of a pad, leading to faster wear.
Uneven pad wear can also occur if the caliper is installed incorrectly. In such cases, the caliper may cock to one side or the friction material of the pad may wear in a wedge pattern.
Another possible cause of uneven brake pad wear could be a failed caliper piston that doesn’t retract after being extended. This could be due to an ailing piston seal or corrosion or damage in the guide pins and bushings of the caliper, its mounting bracket or master cylinder.
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Brake Drag
One of the most essential parts of your lift truck is its master cylinder. This reservoir of hydraulic fluid helps regulate brake caliper power for improved safety and control.
When you press the brake pedal, it pushes this fluid onto your calipers. When you release it, however, it flows back into the reservoir and helps reduce pressure in your calipers.
Unfortunately, if your master cylinder isn’t functioning correctly, the fluid won’t be able to do its job. Additionally, some leakage from the reservoir could occur and prevent full release when you release the pedal.
To test your master cylinder, locate the reservoir and observe it while applying brakes. Do you observe bubbles or swirls forming in the reservoir? That’s a sure indication that your master cylinder needs replacing; you can repeat this same method for testing other cylinders as well.
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