Caliper guides: replacement and lubrication
Supports of rear calipers are needed forperforming several tasks. First, they are responsible for the absence of ringing of the brakes of the car, and secondly, for the uniformity of braking. The main problem is that this element wears out quite quickly, although much depends on the brand of the car. Let's see how to lubricate yourself and, if necessary, change the caliper guides.
Some general information
Before you start the work, you need toDetermine what, in fact, the problem. And the whole point is that hum and creak during braking can arise for several commonplace reasons. Typically, this is a critical wear of the part or complete or partial lack of lubrication under the anther. This work on complexity can be called easy, the only problem can arise if the anthers are attached, but this is quickly solved. To begin with, it is desirable to install the vehicle on a pit or use a hoist. In most cases, a simple jack is enough. We remove the wheel and see our actual problem zone, which will have to work in the near future. If everything is very dirty and nothing is clear, then we pick up a brush for metal and carefully clean everything. Try not to damage the anthers, as they are made of fine rubber.
Required tools
Just let's deal with the tools. The first thing to do is to find the original repair kit on the rear caliper, which consists of a number of spare parts such as an assortment of guides and a piston, grease, a cuff, etc. To get the replacement and lubrication process as short as possible, get a hammer and a flat screwdriver, preferably carry a set of heads and a torque wrench. At hand should be a clean rag, since it will have to work with grease. If the room is dark, then install additional lighting, you can special lamp, so it will be much more comfortable. Now we can proceed to the practical part of the solution of the problem. To do this, remove the rear wheel from the car, first lifting the side of the jack and installing anti-rolls in front of the vehicle.
Replacing guide rails
Unscrew it with the appropriate keybolts from all guides, their 4 pieces. To do this, use two tools: one of them to twist the outer bolt, and the second to keep the nut from scrolling. After completing this step, you can easily move the caliper upward. It often happens that it comes out of the pads rather tightly. To solve this problem, use a hammer and light blows, shaking the device in different directions, take him where you want. After that, the guides of the rear calipers can be removed without any problems, because they keep only on the anther. Its dismantling is carried out quite quickly and simply. Rubber element enough to touch the screwdriver and remove. Note that the upper finger, unlike the bottom one, in the seat has a step that creates a backlash. When assembling, do not confuse them with places. This completes the replacement of the guide rails, you can proceed to the next step.
We continue the repair work
If you notice that the brake caliper guides rusted, then immediately change them. If the state is satisfactory, then you can leave it. Do not forget to remove the shoe guides, as a rule, they are snapped directly into the caliper bracket. Now proceed to clear the removed items. To do this, you can use sandpaper (fine-grained). Before applying grease, degrease the parts. Do not forget to carry out the same actions with the shoe guides, as dirt and water get under the dust cover, which significantly reduces the performance of the lubricants. After that, you can install new parts, or old ones, at your discretion. After the assembly is assembled, take a metal brush and go over the brakes, look at the degree of wear of the shoes, it is possible that soon they will have to be changed.
Which grease should I choose?
The question is quite ticklish for anymotorist. In order for the slide guides to operate under normal conditions and ensure proper safety during driving, it is recommended to use a high-temperature lubricant. This will almost completely eliminate the possibility of jamming or seizing brake pads during movement. When you carry out repairs, be sure to pay attention to the condition of the anther of the guide. The fact is that under it gets dirt and other foreign inclusions. The lubricant is washed away and loses its original properties. If the guides of the front calipers are closed, then with a probability of 99% you can say that the case is in the lubricant. Each replacement of brake pads must include inspection of the guide. Remove the dust cover, remove the old grease layer and apply a new grease on the degreased surface. The treatment must also be subjected to staples, as well as the metal surfaces of the pads. For this, an anti-charge paste is used. Lubrication can be with the inclusion of copper or with the addition of ceramics (magnesium, disulfide).
How to properly lubricate the slide guides
If you have not done this for a long time,time. First you need a tube with lubrication. If you purchased a repair kit, then there it is. The paste has an orange color. If the grease for the guides in the auto shops does not work out, which often happens, then we buy high-temperature paste, several sachets of 6 grams each. Remove the two guide rails first and treat them from dust and dirt. If possible, it is advisable to change the anthers. If you do not install new ones, then remove the old ones, wash them and dry them. On the finger lubricant is applied a thin layer over the entire surface. It is also necessary to apply a little grease under the anthers. By the way, do not overdo it, because the fact that the layer will be large, there is no sense. You can lay a little paste in the anthers and just before installing them. If the rubber is defective, the parts must be changed, because they can not cope with their immediate task, the problem with the creaking will soon reappear. We move on to the next question - this is the installation of a "non-native" guide on the car.
About the installation of a finger on the car
Measures to combat knocking
Most users complain aboutthe occurrence of a knock after a complete replacement of the guide rails or its lubrication. In this case, you can take some measures, for example, use a special aluminum scotch, but this will help only a few thousand kilometers. Another good way is to install the brackets on the caliper. In some cases, these are already available, but if not, in most cases it is this method that helps to solve all problems with scratching or knocking. If you perform all the actions in a complex, the result will be positive. To do this, change the guides, lubricate them before installation, also pay attention to anthers, or rather, their condition. Install the braces (springs) and enjoy the result.
A few important points
Conclusion
In this article, a lot has been said about howreplace the guides with your own hands. Without lubrication, nothing will work, and if it does, it will take a very short time, due to the high coefficient of friction and temperature, which will quickly damage the anthers and other parts. Again, the process of replacing the rear and front calipers and their repair is fundamentally the same. It is also important to know that the finger - the guide of the support - has a hole from which you need to get the grease and put a new one there, for more efficient work. Fit all the parts in the reverse order of removing the sequence, tighten everything thoroughly. The fingers should move freely on the work surface, but do not hang out, that is, without play. Check if the knock has disappeared, then you have achieved your goal. If the problem persists, you should contact a qualified technician for help.
