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What is XCMG Wheel Loader Spare Parts 80513005 Splined Hub?
A XCMG Wheel Loader Spare Parts 80513005 Splined Hub is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating bowl-shaped part called a brake drum. When shoes press on the outside of the drum, it is usually called a clasp brake. Where the drum is pinched between two shoes, similar to a conventional disc brake, it is sometimes called a pinch drum brake, though such brakes are relatively rare. A related type called a band brake uses a flexible belt or "band" wrapping around the outside of a drum.
The brake drum has been around pretty much since cars were invented, and they continue to be used (albeit not as much) because they're cheaper to produce than disc brakes. This is partly because there are fewer compionents involved in a brake drum, and the parking brake can be located inside the drum. A rear disc parking brake entails the use of many more parts.
Brake shoes today are still being used. Here are some advantages that brake drums have over disc brakes:
• Brake drums can provide more braking force than an equal diameter disc brake.
• Brake drums last longer because brake drums have increased friction contact area than a disc.
• Brake drums are cheaper to manufacture than disc brakes.
• Rear brake drums generate lower heat.
• Wheel cylinders are simpler to recondition than with disc brake calipers.
• Brake shoes can be remanufactured for future use.
• Drums have slightly lower frequency of maintenance due to better corrosion resistance.
The brake drum may look complicated, and it can be pretty intimidating when you open one up. Let's break it down and explain what each piece does. Like the disc brake, the brake drum has two brake shoes and a piston. But the brake drum also has an adjuster mechanism, an emergency brake mechanism and lots of springs.
When you hit the brake pedal, the piston pushes the brake shoes against the drum. That's pretty straightforward, but why do we need all of those springs? This is where it gets a little more complicated. Many brake drums are self-actuating. As the brake shoes contact the drum, there is a kind of wedging action, which has the effect of pressing the shoes into the drum with more force.
The extra braking force provided by the wedging action allows brake drums to use a smaller piston than disc brakes. But, because of the wedging action, the shoes must be pulled away from the drum when the brakes are released. This is the reason for some of the springs. Other springs help hold the brake shoes in place and return the adjuster arm after it actuates.
A brake drum is a cylindrical drum that is attached top the inside of a car's wheel, and so rotates at the same speed as the wheel. The drum surrounds a set of brake shoes that are coated in materials that generate friction. When the brake pedal is pressed, these shoes are pushed outwards against the inner surface of the brake drum, generating friction and so slowing the car down. A brake drum is usually made of iron, rendering it resistant to wear. However, brake drums can be susceptible to heat generation, which can have an adverse effect on braking performance.
If the drum is subjected to a long period of hard braking the heat generated can cause the drum itself to expand, meaning that the brake shoes have to be pressed farther outwards to press against the drum's inner surface. This gives the car what is termed as a 'long pedal', because the driver has to press it farther down to get the same braking performance.
Brake drums can also be susceptible to water ingress. If water gets into the drum it can end up ebing compressed between the brake shoe and the inside of the brake drum, and will have an adverse effect on the length of time it will take a vehicle to stop. Unlike a drilled disc brake, there's nowhere for the water to go, so it will continue to affect braking performance until sufficient heat is generated to vapourise the water. Only then will full braking be resumed. They take more time to underdstand, and due to the number of moving parts they contain, take longer than disc brakes to service and overhaul.
Regular care of the brake drum to prevent it from rusting is one of the most important tips, as this part must be free of scratches and cracks on the friction side of the drum in order for the vehicle to brake. You don't know how to keep brake drums from rusting? Here are very useful methods that will help you to properly clean the rust of the Brake Drum.
If it is necessary to replace the brake drum, this component must be replaced on both sides of the axle to avoid irregular functioning of the braking system.
If we are going to replace the components of the Brake Drum of our car, it is essential to always choose a quality rear kit that has all the necessary components for its correct repair.
At Frenkit we have a complete range of repair kits for brake systems. In addition, we have a Development Department that constantly creates new kits for new vehicle models.
If we drive incorrectly, we press the brake pedal carelessly, this will have a negative effect on the wear of our vehicle's Brake Drums.
In this regard, if you notice a vibration, shaking or noise when braking, you should go to the technical service or a workshop specialising in brake system repairs.
As mentioned above, it is also important to monitor the brake fluid in your vehicle. It is therefore advisable to replace it every two years and always use a fluid recommended by the manufacturer.
Finally, in the event that some of the aforementioned tips occur in the Brake Drum of our vehicle, it is necessary to visit a trusted workshop to check the condition of our braking system, as this is a fundamental component that guarantees our safety when driving.
When the time comes to carry out maintenance or changing the Brake Drums of our car, it is essential to choose top level brands, which provide maximum quality and safety in each of their parts.
Remove the wheels
A technician will jack and remove each wheel equipped with drum braking. A technician will do this so they have a better feel of when each brake drum is properly adjusted.
Recalibrate adjusters
Brake drums can be altered using brake drum adjusters, also called star wheel adjusters. Brake drum adjusters are accessible behind a back panel on the brake drum. The "star" on the brake drum adjuster can be rotated to tighten or reduce the distance between the brake shoe and each drum. A technician will manually adjust the star until each brake shoe sits at a proper distance from the drum. This will be repeated for each wheel with brake drums.
Testing the brake shoe seating
Next the technician will rotate each wheel by hand until the correct amount of drag is felt from the shoes lightly contacting the drum. After each brake drum is adjusted, it is a good idea to check the parking brake adjustment as well.
The first thing is to figure out which replacement drums to buy. There a few ways to find out:
The first thing is to check the drums on the axle. Some brake drums have specs etched on them. The specs may include the part number, the size, etc.
Do a search online. Instead of Googling something like "Ford F250 drums", do a search for your axle. Be cautious, though. There's a lot of misinformation online.
Some service manuals have this information.
How to Measure XCMG Wheel Loader Spare Parts 80513005 Splined Hub Size
The brake drum is the central rotating part that holds the wheel in place. It contains bearings and connections for ABS and tracking sensors. To measure the brake drum, you first need to remove the wheel.
You can do this with a wrench, once you have lifted the vehicle using a jack or hydraulic lift.
Next, to access the brake drum, you'll need to remove the brake drum. Loosen it to remove it from the wheel.
You'll then see the exposed brake drum, ready for measurement. Measure across the middle of the brake drum to get the diameter.
The brake drum bolt pattern is the number of bolts lugs on the hub and the diameter of the circle in which they are arranged.
The pitch circle diameter (PCD) is the number of wheel bolts and the diameter of an imaginary circle if you drew it through the middle of each of the bolts in the pattern.
If you are swapping wheels, your new wheel will need an identical PCD to the one you're replacing.
To get the PCD you must measure the wheel bolt pattern:
In five-bolt patterns, start from the middle of one lug and measure to the outside of the next but one lug.
In four or six-bolt patterns, measure from the middle of one lug to the outside of the opposite lug in the pattern.
The PCD value you get will be the number of lugs multiplied by the ring diameter, for example: 5 x 104.
Remove th drums
Some vehicles still have brake drums or a combination of discs and drums. Passenger cars with this combination will have the brake drums on the rear. Remove the brake drums, being careful when you touch the brakes as they may be hot and could burn.
Brake components will be hot if the vehicle has been driven recently.
Check wheel cylinders and linings
Inspect the external portion of the wheel cylinder.
If the backing plate is covered with a gooey substance you will need to determine if it is brake fluid or grease. Brake fluid will wash away with water so try washing it off. If it doesn't wash off then it is probably grease from a faulty seal.
Carefully lever the dust seal back and inspect the inner portion of the cylinder for any signs of leakage.
Check brake shoes
Check the thickness of brake shoe lining. You will need to consult the workshop manual for your vehicle to check the allowable minimum thickness. If the thickness is at the point of, or close, to the minimum thickness they should be replaced.
Also, if the brake shoe lining is covered in oil or grease they must be replaced. This could be the result of a leaking axle seal or wheel cylinder and should be checked out.
Check and measure the drum
Visually inspect the drum braking surface for scoring. Any large score marks mean the drum will have to be machined or replaced.
Measure the inside diameter of the brake drum at several points around the circumference and check the manual for the specifications for an out-of-round condition.
If the reading is outside the manufacturer's specifications the drum will either need to be machined or replaced.
Reassemble the brake drum and repeat the procedure for the other brake drum assembly's.
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