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The total cost of brake repair will depend on not only where you have the service done, but what type of truck you have. The two main options for getting brakes repaired are getting them fixed at a truck stop and get them fixed at a shop by a mechanic. The brake repair cost of a truck with outboard drums will also be much less than one with inboard drums.
For those that would trust a truck stop to do it, a truck stop brake job will cost you about $200 – $250 per axle, for a total of around $500. Getting them done in a shop will often cost about $400 per axle, but you also have an actual mechanic looking at your wheels and brake systems, which is a valuable perk.
The brakes on a semi-truck should be changed before they suffer too much performance degradation from wear. In most cases, semi brake pads should be changed about every 30,000 miles, though this can change significantly depending on the conditions the brakes have seen. More frequent brake usage, such as mountainous or hilly terrain that requires constant brake use under extreme conditions, can reduce that lifespan down to 20,000 miles.
There are many different causes behind brake failure in a semi, but most of them are due to a lack of proper maintenance or training deficiencies. If the system isn’t maintained well and inspected frequently, there can often be damage or wear to components that can reduce the brake’s lifespan.
Brake linings that are misaligned can reduce the stopping power of the whole system. Calipers that have become sticky from oil and debris can lead to brake dragging, which builds up friction and heat, contributing heavily to premature failure. Additional causes and contributing factors are fluid lines that leak and other mechanical issues that prevent the brakes from stopping effectively.
The length of time that commercial truck brakes last is highly dependent on the driving habits of the operator, as well as the difficulty of the miles they’re putting on their rig. Higher brake usage or usage while in extreme conditions can contribute to the brakes having more wear and tear, which reduces their lifetime.
Most brake pads on semi trucks should last for about 30,000 miles with relative reliability. However, if there are many driven miles that are in mountainous environments or areas with high heat, the performance will be reduced considerably. How long commercial truck brakes last also depends on the schedule of the operator and their routes. With full-time drivers putting 5,000 miles or more on in a week, they may need a brake job nearly once per month.
Many things can cause brake drums to crack. In most cases, the cracks are caused by excessive heating and cooling of the brake drum itself while the truck is in operation. Cracked drums can be visually verified and are sufficient reason to take a truck off the road for repair. Some cracks, like heat checking, can be worn away with brake usage, but more serious cracks require the drum to be replaced.
Senior Member
Join Date: Aug 2015
Location: Benton County, Iowa
Trailer: 2013 Escape 21 Classic Number 6, pulled by 2018 Toyota Highlander
Posts: 8,199
Brakes
Quote:
gbagloOriginally Posted by
Take and post photos please.
Whoa Nelly, and greetings to all Escape owners who ever stepped on the brakes.As promised I have inspected a brand new brake set that I plan to install on our E21. I planned to do this two years ago but the Pandemic got in my way. I didn’t think I absolutely needed new brakes but then again I had towed 34,000 miles the previous 2 1/2 years and had plans to roll well over 10,000 more in 2020 so I bought the new sets. Instead we only towed about 4,000 total in the two years since then. That’s my story and I’m stickin’ to it.When you buy brand new Dexter brakes ( manual adjustment models) from the dealer they come with a pigtail pair of wires, coming off the magnet. Also included are 2 dust covers for the adjusting slots and 4 new nuts that hold the brake assy. to the axle. And a good set of instructions.I brought a set inside my house for measurement and illustration ( remember, left and right are different parts numbers) and left and right are as you stand behind the equipment in every case but one in American manufacturing standards. The exception is when describing a manure spreader, as nobody wants to stand behind one of those. (Rimshot please).The photos below show that a brand new set of brakes comes with wearable shoes that are 3/16 of an inch thick. They are bonded not riveted so the old term “down to the rivets”Is not appropriate for describing “worn out”. Glazing, grease, running out of adjustment, warping the drums from riding the brakes coming down the mountain are all operator caused maladies.So, if you want to know how much wearable brake surface you have used buy yourself a little steel ruler at a big box store or ask for a digital readout inside or outside reading Digital Caliper ( mine is a General brand ultra tech no. 1433 from Sandy Claws and measure away. Other than pulling the drum for access no additional disassembly is required. Measure, do the math and make the judgement on how much has been used in the miles you’ve pulled , your assessment of the overall condition and decide whether or not it’s time for new ones.If you think this is a long post, don’t get around me at a rally, I never shut up. But I love you all. Even people who disagree with me and don’t have the same politics I do.Hope this helpsIowa Dave
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