The windshield cleaning system is a critical safety element, especially in the harsh Russian winters. When the wipers stop working correctly, the driver is often faced with the need to diagnose and repair the drive mechanism. In the car Nissan Almera Classic this system has its own design features that are important to consider during maintenance.
A common cause of windshield wiper failure is wear or breakage of the **trapezoid** itself. This is a mechanical unit that converts the rotational movement of the motor into the reciprocating movement of the leads. If you notice that your wipers move jerkily, get stuck in extreme positions, or simply don't work, the problem most likely lies here. Owners of Nissana Almera Classic often encounter that the plastic trapezoid breaks due to icing of the brushes, which requires immediate replacement of the unit.
Design features of the trapezoid on the Nissan Almera Classic
The windshield wiper mechanism on this model is a system of levers and rods connected by hinge joints. The design is designed to provide maximum coverage of the windshield surface. The main body is made of durable plastic, and the hinges are equipped with metal bushings or pressed-in metal tips.
A special feature of the unit is its location under a plastic cover, which protects the mechanism from dirt and water. This solution protects the **trapezium** from the aggressive effects of reagents, but complicates access to the unit if repairs are necessary. The windshield wiper motor is attached directly to the trapezoid body, forming a single unit in some modifications.
It is important to understand that even slight wear in one of the connections can lead to disruption of the movement geometry of the wipers. This causes characteristic creaking or knocking sounds that are clearly audible from inside the car. Timely diagnosis will help avoid more serious damage, such as engine combustion due to jamming of the mechanism.
The manufacturer uses a specific pattern for attaching the leashes, which requires careful dismantling. Improper removal of the arms may result in deformation of the arms or damage to the threaded connection. Therefore, when carrying out work, it is necessary to strictly follow the disassembly technology.
The main reasons for mechanism failure
There are several factors that lead to premature wear or failure of the windshield wiper **trapezoid**. The most common cause is frozen brushes. When the wipers stick to the glass and the driver tries to turn them on, the motor creates a huge load on the mechanism, which often leads to the plastic gears inside the gearbox breaking off or the levers breaking.
Another factor is the natural wear and tear of the hinge joints. Over time, the lubricant in friction areas is washed out by water and dirt, which leads to the appearance of backlash. Increased gaps cause beating of the levers and disruption of the trajectory of movement. In such cases, the wipers may work, but they will clean the glass unevenly, leaving unwashed areas.
Corrosion of metal elements also plays a role, especially in regions with high humidity levels or the use of road chemicals. Rust can jam the hinges, making movement impossible. In addition, vibration from the engine is transmitted to the unit, which accelerates the process of destruction of fragile plastic parts.
- 🌡️ Freezing of brushes and an attempt to force them to start
- 🛢️ Lubricant is washed out of the hinges and backlashes appear
- 🔩 Corrosion of metal rods and fasteners
- ⚙️ Natural wear of bushings and plastic gears
Choosing the right spare part: original or analogue
When selecting **trapezoid** for Nissan Almera Classic It is important to understand the difference between original parts and high-quality analogues. The original part, as a rule, has the manufacturer's markings and is made of materials designed to last the entire service life of the vehicle. This guarantees the accuracy of the geometry and the reliability of the connections.
However, original spare parts can be quite expensive and are not always available in regular stores. In such situations, it is worth paying attention to proven brands that produce high-quality analogues. Manufacturers such as Denso, NTK or specialized automakers offer solutions that are not inferior in their characteristics to the original.
When purchasing, be sure to check the contents. Some analogues may be supplied without the motor if it was in good working order, while others offer a complete assembly. Also pay attention to the quality of the plastic: it should be dense, without traces of remelting or foreign inclusions. Saving on materials can lead to the new part failing after just a few months.
Comparative characteristics of popular spare parts options are presented in the table below:
| Part type | Benefits | Disadvantages | Service life |
|---|---|---|---|
| Original (Nissan) | Ideal geometry, durability | High price, rare | 10+ years |
| High-quality analogue (Denso) | Optimal price-quality ratio | Requires careful selection | 7-9 years |
| Budget analogue | Low cost | Unstable quality of plastic | 2-4 years |
| Restored node | Low price | Risk of hidden defects | 3-5 years |
⚠️ Attention: When ordering a spare part by VIN code, be sure to check the equipment of your specific car, as there are modifications with and without rain sensors, which may affect the design of the unit.
- Original
- High-quality analogue
- Budget option
- I buy used
Preparation for replacement and necessary tools
Before starting work, you need to prepare a workplace and a set of tools. Access to the **trapeze** is limited, so you'll need plenty of room to maneuver. It is best to carry out work in a garage or in a specially equipped inspection pit to provide convenient access to the bottom of the unit.
You will need a standard set of wrenches and sockets, including 10, 12, 14 and 19mm wrenches. You also cannot do without flat-head and Phillips-head screwdrivers, as well as a special puller for removing the wiper arms. If there is no puller, you can use a pry bar, but you must act extremely carefully so as not to damage the paintwork of the body.
- 🔧 Set of sockets and sockets (10, 12, 14, 19 mm)
- 💧 WD-40 or similar liquid for loosening stuck bolts
- 🔨 Hammer and soft spacer for knocking out spline joints
- 🧼 Clean rags and grease for joints
Before starting work, be sure to disconnect the negative terminal of the battery. This is to prevent accidental activation of the windshield wiper motor during disassembly, which could result in personal injury or damage to the mechanism. It is also worth preparing new lubricant to immediately treat the new hinges after installation.
☑️ Preparing to replace the trapezoid
⚠️ Attention: Do not attempt to remove the wiper arms without first resetting their position to zero. If you remove them in any position, the wipers will not be in the correct parking position when reinstalled.
Step-by-step instructions for dismantling and installation
The replacement process begins with removing the plastic covers covering the windshield wiper mechanism. These elements are usually attached to clips, which must be carefully pryed off with a screwdriver. Be careful not to break the plastic clips, as replacements may be difficult to find.
Next, you need to remove the wiper arms themselves. To do this, unscrew the fastening nuts (usually 13 mm), but do not remove them completely immediately. Lift the lever slightly and use a puller or pry bar to slide it off the splines. After removing the leads, unscrew the nuts completely and move them to the side.
Now you can proceed to disconnecting the motor and removing the **trapezoid** itself. Unscrew the bolts securing the motor to the body and disconnect the electrical connector. Next, unscrew the bolts holding the mechanism body. Often it is also necessary to remove the front bumper or fender liners for easy access to the fasteners from below.
Leash removal details
If the lever cannot be removed by hand, apply several light blows with a hammer through a piece of wood at the base of the lever along the axis of the shaft. This will help slide it off the splines without deformation.
Installing the new part is done in the reverse order. Before attaching the **trapezoid**, make sure that all hinges are movable and lubricated. Screw the mechanism to the body, connect the motor and connect the electrical connector. Do not tighten the nuts securing the arms completely until the operation of the mechanism is checked.
After assembly, be sure to check the operation of the windshield wipers. Turn them on at different speeds and make sure they don't touch each other or touch the edges of the glass. Adjust the position of the leashes if they do not park in the desired zone. Only after this can you finally tighten all the nuts and install the plastic covers.
The correct assembly sequence: first attach the mechanism to the body, then connect the motor, and only after checking the operation - install the wiper arms.
Nuances of operation and service life extension
In order for the new **trapezoid** to last as long as possible, you must follow a few simple operating rules. First and foremost, never turn on your windshield wipers if your windshield is covered in ice or snow. Always clean the glass by hand before using the cleaning system.
Check the condition of your windshield wiper blades regularly. Worn rubber bands create increased friction and stress on the mechanism, which accelerates wear on the hinges. Replace brushes at least once a year, or more often in harsh climates. Also keep the path of movement of the levers clean by removing leaves and debris.
Periodic lubrication of the hinge joints will also extend the life of the joint. Although modern mechanisms often use self-lubricating bushings, additional treatment with silicone lubricant will not harm. This is especially true in regions with low temperatures, where regular lubricant may freeze.
- 🧹 Clear the windshield of ice before turning on the wipers
- 🔄 Change your windshield wiper blades at least once a year
- 🧴 Treat hinges with silicone grease every 2 years
- 🚫 Do not use wipers to clear snow from the hood
⚠️ Attention: Using aggressive detergents to clean glass can lead to the destruction of rubber seals and accelerate wear of the brushes, which will increase the load on the trapezoid.
Before the onset of winter, remove the wiper arms and place them in a vertical position. This will prevent the rubber bands from freezing to the glass and the gears of the gearbox from breaking off when trying to start.
Possible problems after replacement
Sometimes after replacing the **trapezoid**, owners encounter new problems. One of the common complaints is that the wipers operate unevenly or get stuck in the middle of their stroke. This may be due to improper assembly of the mechanism or misalignment of the levers during installation.
Another problem is the appearance of extraneous noise. If you hear grinding or knocking noises, check that all connections are installed correctly. Perhaps there is excess fastener left somewhere or the nut is not tightened completely. It is also worth making sure that the new part does not have a manufacturing defect.
If the wipers do not park in the desired position, there may be a problem with the motor or improperly installed arms. In some cases, it is necessary to replace the motor along with the trapezoid, since the parking mechanism can be built into the motor gearbox. In such a situation, it is recommended to replace the entire assembly.
In rare cases, a fuse or relay may blow after installing a new part. This happens if a short circuit occurs during installation or if the new **trapezoid** has increased resistance due to a manufacturing defect. Check the electrical circuit and replace the fuse if necessary.
Frequently asked questions from owners
Is it possible to replace only the trapeze, leaving the old motor?
Yes, this is technically possible if the motor is working properly and has no shaft play. However, manufacturers often sell the unit assembled, since the service life of the motor and trapezoid is approximately the same. Replacing just the mechanism can save money, but requires a thorough inspection of the motor.
How long does it take to replace a trapezoid on a Nissan Almera Classic?
If you have the necessary tools and experience, the work takes from 1.5 to 3 hours. A beginner may need more time, especially at the stage of removing stuck bolts and plastic covers.
Do I need to remove the bumper to replace the trapezoid?
Not always. In some cases, it is enough to remove the fender liners and the lower part of the protection. However, full access to the lower mounts often requires removing the front bumper, which greatly simplifies the process and reduces the risk of damage to parts.
Why do wipers work but don't clean the glass?
This may be due to wear on the brushes or an incorrect angle of contact. If the trapeze is installed correctly, check the condition of the rubber bands on the brushes and replace them if necessary. It is also possible that the leashes are not installed correctly.
What is the best lubricant for trapezoid joints?
It is recommended to use a special silicone grease or lithium grease that is resistant to low temperatures. Regular motor oil or graphite grease are not suitable as they can wash out with water or freeze.