Brake Calipers for automobile
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VAUXHALLInformation - Brake Calipers
Brake mechanisms are divided into disk and drum. The disc mechanism is a construction that consists of a calliper, one or two brake cylinders and two brake pads and disc. Calliper is a disc brake mechanism for attaching the brake cylinders. The calliper itself is obligatory mounted on the steering knuckle of the front wheel. There are two brake cylinders to which two brake shoes are attached. When driver presses the brake pedal, the pistons of the cylinders appear and begin tightly to push the shoes to the disc. And when he releases the pedal, the brake shoes and pistons return to their original position. This happens because of the easy knock of the disc.
Parts of the calliper are constantly subjected to water and salt from the road, as well as the influence of brake fluid from the brake system itself. Under these conditions, it is necessary to use special lubricants, which are designed for extreme operating conditions. Here are the basic requirements for the lubrication of the brake calliper. It is important the lubricant to be high-temperature with an operating temperature up to 180 degrees and above. The grease should be combined with plastic parts of elastomeric seals.
If you need to replace the brake calliper, you can buy it in our online store. We offer our customers a wide assortment of spare parts and short delivery terms. In addition to the brake calliper, in our online shop you can buy brake shoes, brake cylinder, clutch plate and brake drum.
All you should know about brake caliper: lifetime limits, common defects and their signs, tips and recommendations
The brake caliper has no specified lifetime limit. Usually, the brake caliper requires replacement if its elements, especially the piston, were exposed to corrosion and abrasive wear because of torn dust boots.
Common signs of component defect are: changing of brake pedal resistance, its vibration, extraneous sounds when driving over bumps or braking. Skidding when stopping may also indicate brake caliper fault. In addition, working fluid leakages on a wheel may signify a defect.
Diagnostics of the brake caliper should be entrusted to specialists at a service station, as it is very difficult to define whether the component operates correctly without special knowledge, skills and equipment.
In order to replace the component, install chocks under the wheels, loosen fastening nuts or bolts of the wheel, lift the corresponding car side with a jack (depending on whether the front brake caliper is being replaced or the rear one), and fully unscrew the fasteners. Then demount the wheel, unscrew fasteners of the brake hose and install a plug to prevent brake fluid leakage. If the rear brake caliper is being replaced, then you should remove the parking brake cable. After this, disconnect the brake caliper from the steering knuckle. Then, install a new component and assemble all the parts in reverse order.
After installation, if necessary, refill braking fluid and be sure to bleed the braking system. It is recommended to inspect the brake hoses during replacement of the brake caliper and replace them, if damaged.
What should brake calipers be greased with?
Brake calipers should be greased with special products that retain their viscosity at high temperatures and do not get dissolved in water and brake liquid. Modern lubricants that meet these requirements usually belong to one of the following three groups.
The first group includes high-temperature lubricants intended for caliper brackets, anti-squeal shims and back of brake pads.
The second group contains lubricants for pistons, cylinders, pins, guide pins, bolts, and seals.
These lubricants are often marked as Rubber Grease. There exist also multi-purpose lubricants for brake calipers. Most well-known manufacturers, such as Molykote, Bosch, Permatex, etc. produce rubber grease-grade lubricants. These are suitable for all moving parts of the brake caliper, helping cut lube expenses.
How do I remove a brake caliper?
Follow the next steps to remove a brake caliper:
- Apply the parking brake.
- Turn the whees to the proper position to where the calipers may be accessed easily. Secure the wheels on the other side. Place wheel blocks before one front and one rear wheel.
- Lift the car off the ground, using a jack.
- Remove the wheel.
- Unscrew the fasteners and take off the caliper.
- If you are removing the caliper so as to install new brackets or pads, there is no need to remove it completely. However, if it is a dust boot or a piston that need replacing, the brake hose leading up to the caliper will have to be disconnected.
This is a general algorithm; the sequence may differ depending on the car model and which axle the caliper is installed on. Please see video tutorials for more details.
Which brake calipers are better: fixed or floating ones?
Brake calipers with a floating bracket are lightweight, compact, simple in design and inexpensive. They are great for smooth-driving owners of small and medium-sized cars.
Aggressive-style drivers should opt for fixed-bracket calipers: they are significantly less prone to overheat in case of repeated emergency braking. Multiple pistons prevent uneven wear of brake pad.
Fixed-bracket calipers work great for large, powerful cars. They lack the most vulnerable elements present in floating calipers, namely, guiding pins. This helps to cut expenses on special grease.
Brake Calipers at low cost: Top Spares
Article №: 521001 
- Brake Caliper Type Brake Caliper with integrated parking brake
- Material Aluminium
- Brake System TRW
- for brake disc thickness [mm] 12,0
- Weight [kg] 1,72
- Paired article numbers 521002
- Diameter 1/ Diameter 2 [mm] 41,0
Article №: 430362 
- Brake Caliper Type Brake Caliper with integrated parking brake
- Material Aluminium
- Brake System ATE
- for brake disc thickness [mm] 11,0
- Weight [kg] 1,64
- Paired article numbers 430361
- Diameter 1/ Diameter 2 [mm] 38,0
Article №: 78B0002 
- Fitting Position Rear Axle Left, behind the axle
- Brake Caliper Type Brake Caliper (1 piston)
- Piston Diameter [mm] 38
- Brake Disc Type Solid
- Net weight [kg] 1,4
Article №: 521452 
- Brake Caliper Type Brake Caliper with integrated parking brake
- Material Aluminium
- Brake System LUCAS/TRW
- for brake disc thickness [mm] 9,0
- Weight [kg] 1,34
- Paired article numbers 521451
- Diameter 1/ Diameter 2 [mm] 38,0
Article №: 78B0086 
- Brake Caliper Type Fist-type Caliper, Brake Caliper with integrated parking brake
- Material Aluminium
- Manufacturer Restriction TRW
- Service exchange part
- Paired article numbers BHN315E
- Diameter 1 [mm] 38
- Observe technical data
Article №: BHN183E 
- Brake Caliper Type Fist-type Caliper, Brake Caliper with integrated parking brake
- Material Aluminium
- Manufacturer Restriction TRW
- Service exchange part
- Paired article numbers BHN182E
- Diameter 1 [mm] 38
- Observe technical data
Article №: 78B0037 
- Brake Caliper Type Fist-type Caliper
- Brake System ATE
- Diameter [mm] 54
- Supplementary Article/Supplementary Info without holder
- Paired article numbers 11.9541-9554.2
- MAPP code available
Article №: 78B0005 
- Fitting Position Rear Axle Left
- Brake Caliper Type Brake Caliper (1 piston)
- Brake System LUCAS
- for brake disc thickness [mm] 9
- for OE number 1J0615423
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