Driving safety directly depends on the health of the braking system, where the key role is played by the working units that convert hydraulic pressure into mechanical force. For crossover owners Nissan Terrano The rear brake cylinder is a critical element responsible for the effectiveness of vehicle deceleration when the drum mechanisms operate.
Many drivers underestimate the importance of regularly checking the rear elements, focusing only on the front discs, which is a fatal mistake. Under Russian operating conditions, with its temperature changes and reagents, brake cylinder rear nissan terrano is exposed to aggressive moisture and dirt, which leads to corrosion and jamming of the pistons.
Design features and operating principle
Rear axle Nissan Terrano equipped with drum brakes, in which the main actuator is a two-piston wheel cylinder. When you press the brake pedal, brake fluid is pressurized into the cylinder cavity, pushing the pistons apart and pressing the brake pads against the inside of the drum.
The unique design is that the cylinder is located horizontally inside the drum, which makes it especially vulnerable to moisture ingress through the hub seals. Hydraulic drive must work perfectly hermetically, since even a microscopic crack in the rubber boot can cause abrasive dust to get inside the case.
The body material is usually cast iron or aluminum alloy with an anti-corrosion coating, but over time the metal can crack due to corrosion. Rubber cuffs Pistons lose elasticity over time, which leads to fluid leakage and a drop in pressure in the circuit.
It is important to understand that a malfunction of one cylinder creates an imbalance in braking forces, causing the car to pull to the side when braking hard. This phenomenon is especially dangerous on slippery roads or when driving at high speeds, when the slightest mistake can lead to an accident.
Symptoms of malfunction and diagnosis
The problem can be identified not only by a drop in braking efficiency, but also by a number of indirect signs that appear long before a complete breakdown. The very first signal is a change in the behavior of the brake pedal: it may become soft or sink to the floor when held for a long time.
If you notice that your car is braking spontaneously or is pulling to the side, you should immediately check the rear wheels. Often the reason is jammed piston, which cannot return to its original position after releasing the pedal, constantly pressing the pads against the drum.
A visual inspection will also provide a lot of information: the presence of wet spots on the inner surface of the drum or on the cylinder boots is a direct signal for replacement. Nissan Terrano has an open rear suspension design, which makes it easy to see traces of brake fluid leakage without removing the wheel.
- 🔴 Increased braking distance and the need to press harder on the pedal.
- 🔴 The appearance of a characteristic burning smell from the rear wheels after a trip.
- 🔴 A creaking or grinding sound that occurs when driving even without pressing the brake.
- 🔴 Jerks and vibrations when the car smoothly slows down.
Sometimes the problem lies not in the cylinder itself, but in jammed guides or worn pads, so diagnostics must be comprehensive. Never ignore even the slightest suspicion, as the braking system does not forgive negligence.
⚠️ Attention: If you notice that the cylinder boot is wet, operating the vehicle is prohibited until the fault is eliminated, since water getting inside can lead to instant jamming of the pistons at the first sharp braking.
Selection of original and analogues
When selecting spare parts for Nissan Terrano It is important to focus on the vehicle’s VIN code, since depending on the year of manufacture and the sales market, parts from different manufacturers may be installed. Original brake cylinder from Nissan is distinguished by high quality casting and durability of rubber seals.
However, there are many high-quality analogues on the market, which often surpass the original in terms of resource or offer a better price. Brands like Nissin, Tokico or TRW They are often suppliers to the assembly line, so their products fully comply with factory standards.
Avoid purchasing spare parts from little-known Chinese brands without reviews, as their geometry may be damaged, which will lead to rapid wear of the brake pads and drums. The cheapness of such a part can result in expensive repairs of the entire brake system in the near future.
The table below provides comparative data for popular rear brake cylinder part numbers:
| Manufacturer | Article | Type | Approximate price |
|---|---|---|---|
| Nissan (Original) | 41060-1HF0A | Double piston | High |
| Nissin (OEM supplier) | 12-0234 | Double piston | Average |
| TRW | LBC1045 | Double piston | Average |
| Budget analogue | 41060-XXX | Double piston | Low |
When purchasing, be sure to check the integrity of the packaging and the presence of protective caps on the bleeder fittings. The presence of factory lubricant on the pistons and high-quality rubber seals in the kit is a prerequisite for the normal operation of the unit.
- Original Nissan
- Original analogues (Nissin)
- Quality brands (TRW, Brembo)
- Budget options
DIY replacement instructions
Replacing a rear brake cylinder is a moderately difficult task that can be handled by a car enthusiast with a basic set of tools and an understanding of the car's structure. The process requires care, since working with brake fluid and drum springs has its own nuances.
The first step is preparation: jack up the car, remove the wheel and unscrew the two bolts securing the brake drum. If the drum is stuck, gently tap it through a wooden spacer so as not to damage the seating surface.
- 🛠️ Remove the drum and clean the mechanism from dust and dirt with a metal brush.
- 🛠️ Disconnect the handbrake cable from the lever located on the rear shoe.
- 🛠️ Unscrew the brake fluid supply fittings and remove the old cylinder.
- 🛠️ Install the new unit, tighten the fittings and connect the handbrake cable.
Pay special attention to cleaning the seat on the rear beam before installing a new cylinder. Any grain of sand or corrosion can break the seal and lead to rapid failure of the part. Use WD-40 for processing threaded connections if they are heavily rusted.
☑️ Preparation for replacement
⚠️ Warning: Wear protective gloves and goggles when handling brake fluid as it is toxic and may cause damage to your skin or eyes. Also avoid getting liquid on the car's paintwork.
Bleeding the brake system and nuances
After installing a new cylinder, it is necessary to bleed the brake system to remove trapped air. Air pockets in the line make the brake pedal soft and reduce the effectiveness of deceleration, which is unacceptable.
It is better to carry out the procedure together: one person presses the pedal, the other opens and closes the bleeder fitting. Repeat the operation until clean liquid without air bubbles begins to flow out of the fitting.
It is important to monitor the brake fluid level in the expansion tank under the hood. If the level drops below the minimum, new air will enter the system and the procedure will have to start over. Use only fresh fluid that meets specifications DOT-4.
After assembly, do not forget to check the operation of the handbrake by adjusting its tension. The pads should be pressed evenly, and the drum should rotate freely when the handbrake is lowered.
How to bleed the brakes correctly?
The bleeding order usually starts with the wheel farthest from the GTZ (right rear), then left rear, right front and left front. Each time, press the pedal 2-3 times, hold it pressed, then the assistant opens the fitting, releases the air and closes it, after which the pedal can be released.
Before you start pumping, make sure that all fittings and tubes are not cracked, and that the rubber hoses have not lost their elasticity, since old rubber can burst under pressure when the pedal is pressed sharply.
Typical maintenance errors
Many owners Nissan Terrano make mistakes that shorten the service life of new parts. The most common problem is ignoring the condition of the guides and boots. If the guides are not lubricated and the boots are not replaced, the cylinder may jam due to misalignment.
Another common mistake is using old brake fluid. The liquid is hygroscopic and absorbs moisture over time, which lowers its boiling point and causes corrosion from the inside. It needs to be changed at least once every two years.
Some mechanics try to “repair” an old cylinder by rubbing the piston with sandpaper. This is strictly prohibited: even micron scratches will break the seal of the cuffs, and the new cylinder will begin to leak within a week.
Also, do not skimp on replacing brake pads when changing cylinders. If the pads are worn unevenly or have cracks, they will quickly damage the new mechanism.
Regularly checking the condition of the brake system and timely replacement of consumables is the key to your safety and durability of vehicle components.
⚠️ Caution: Never mix brake fluids from different brands or different classes (for example, DOT-3 and DOT-5), as this can cause a chemical reaction, destruction of rubber seals and complete brake failure.
Frequently asked questions from owners
How long does it take to replace a rear cylinder?
If you have experience and tools, replacing one cylinder takes from 30 to 60 minutes per wheel. Without experience, including disassembling the drum and pumping, the process can take 1.5–2 hours.
Is it possible to change the cylinder on only one side?
Technically it is possible, but experts strongly recommend replacing them in pairs. Cylinders on one axle usually wear at the same rate, and the old cylinder on the other side can fail very quickly.
What should I do if the brake pedal does not become hard after bleeding?
This means that there is air left in the system or there is air leakage through leaky connections. Check all fittings, hoses and make sure the master cylinder is in good condition.
Do I need to change the drum when replacing the cylinder?
Not always. If there are no deep burrs, grooves or critical wear on the surface of the drum, it can be cleaned and reinstalled. However, if there is severe wear, the drum must be replaced.