1. On a three-lane road, when you overtake the vehicle ahead (in the middle lane) from the left and return to the middle lane, if a car behind you overtakes from the right at a faster speed and slightly ahead of you merges into the middle lane, your car's front might scrape the rear of the other car if you only look ahead or in the rearview mirror. Since both cars are moving quickly while overtaking, the distance is too short to react when the issue is noticed. Such scraping risks and similar situations often occur on multi-lane urban expressways where there are many vehicles traveling at high speeds, frequently switching lanes for overtaking. Focusing solely on one point without considering others can easily lead to danger.
Numbness Index: 6 Danger Index: 6
Suggestion: You must be vigilant in all directions. For beginners, "even if surrounded by thousands of enemies, I remain steadfast."
2. The two side pillars of the driver's cabin can completely cover a cyclist or pedestrian. Similarly, purchasing a fire truck involves checking fire truck pictures; the interior rearview mirror may also obstruct the 45-degree view to the right to varying degrees. In a crossroads without traffic lights or in bustling downtown areas with mixed pedestrian and vehicle traffic, numerous targets can distract attention, and pedestrians entering blind spots may go unnoticed. If pedestrians move parallel to the car, these blind spots can persist for several seconds. At such times, sudden acceleration or turning of the car may cause pedestrians to suddenly appear, leading to unexpected situations. Although collisions may not be severe, damaging the car is painful, and dealing with difficult individuals can be quite troublesome.
Numbness Index: 3 Danger Index: 3
Solution: Drive slowly to allow sufficient time for observation, focusing on three blind spots, swaying your head back and forth, looking around.
3. On narrower streets (especially four-lane roads), when passing parked vehicles along the roadside, most vehicles have tinted windows making it hard to see inside. When passing, be cautious of careless passengers suddenly opening car doors on the right. These roads are usually small streets or within residential areas, and accidents here can be hard to resolve reasonably. Replacing a door is a minor issue, but causing serious injury to someone isn't something to take lightly!
Numbness Index: 4 Danger Index: 4
Solution: Slow down, honk the horn, and stay as close to the center of the road as possible.
4. Following a vehicle while overtaking is a common scenario. Generally, when the lead vehicle finishes overtaking, it will merge smoothly, leaving room to fit between two vehicles. However, when an oncoming vehicle is approaching quickly, the lead vehicle may suddenly make a sharp turn to merge, leaving you stranded in the overtaking lane. This situation becomes even more dangerous if the lead vehicle is larger, blocking you from being seen by the oncoming vehicle, which might then accelerate as the lead vehicle merges. Such incidents often occur on two-lane city roads. I once had a similar experience, and the two vehicles managed to stop about 3 meters apart, leaving the driver momentarily stunned for over 10 seconds, fortunately without an accident.
Numbness Index: 5 Danger Index: 5
Solution: When overtaking, ensure to observe the movement of oncoming vehicles. Avoid following large vehicles; wait until they complete their maneuver before acting.
5. On rural roads, sometimes farmers dry wheat or there are brief sections of gravel due to road repairs. Because these sections are short, many people drive through them at high speed. This is extremely dangerous. In emergency situations, drivers instinctively brake or swerve, but on such surfaces, the vehicle behaves unpredictably, moving in unexpected ways and directions. There was a report indicating that in just five days, three accidents occurred on such surfaces, resulting in six fatalities.
Numbness Index: 3 Danger Index: 10
6. After driving a long stretch of mountain roads, upon reaching a longer, open, and straight downhill section, reducing gears and braking balances gravity and braking force, allowing the car to glide down at a stable speed. During this time, you might feel like relaxing, removing your foot from the brake or accelerator to stretch? It’s best not to. Your foot loses its reference point, and danger grows silently. In an emergency, can you accurately place your foot back on the brake? And if you're a beginner, would you mistakenly press the accelerator?
Numbness Index: 2 Danger Index: 2
Warning: Though your legs and feet may feel tired, it’s still recommended they stay ready for action.
7. On wide and smooth roads, when overtaking and running parallel to the vehicle ahead, suddenly a car appears as if emerging from underground! The situation is as follows: the road is straight at both ends but has a dip in the middle. If it were an up-and-down slope, most people would notice, but this type of slope can confuse the eyes! Accidents caused by terrain changes often occur on mountainous slopes, turns, and intersections where the terrain suddenly shifts, catching drivers off guard. Here, we introduce the concept of "accident-prone terrain." Please pay extra attention to changes in terrain, reduce speed promptly, and avoid contributing to "accident-prone areas" due to your own mistakes!
Numbness Index: 7 Danger Index: 7
Suggestion: As the elders say, "always keep an eye on the horizon," striving to develop a keen sense for hazardous areas.
8. Normally, on urban roads, everyone adheres closely to traffic rules. But on rural roads, it seems no one cares about traffic laws, committing violations as frequently as blinking. Why? No police officers around! Would you relax your vigilance and follow the crowd? Let me tell you, police officers might be lurking somewhere, waiting for you to fall into their trap! Of course, in desolate areas, police won't bother showing up; they prefer company, like patrol cars or fee collectors. Just watch out for those wearing big caps. Also, if you drive too fast, police can't catch up. Therefore, police usually appear on relatively busy sections, where speeds aren’t too high, visibility isn’t great, and you’re eager to show off your skills. In such cases, your risk is losing 50-200 yuan.
Numbness Index: 10 Danger Index: 1
Advice: Police officers tend to appear when you least expect them!
9. Driving on suburban roads, if a large vehicle closely follows you without any gap, don’t you feel uneasy? If not, you should wake up. If an emergency occurs ahead, you may brake in time, but can the large vehicle behind you stop? If unable to shake off the large vehicle (indicating it's also speeding), the best way is to signal, slow down, move to the side, and let the large vehicle pass first.
Numbness Index: 5 Danger Index: 9
Warning: Under equal distance and speed, the risk and damage level of a large vehicle rear-ending you is much greater than a small vehicle. If unable to increase the distance from a large vehicle, it's safer to follow rather than be followed by a large vehicle.
10. Overtaking is a high-risk moment when driving (higher speed and closer proximity). One risk is the vehicle ahead noticing a situation and suddenly swerving left, causing the following vehicle to be squeezed or rear-ended; most people are aware of this. What's often overlooked is when someone or an object crosses the road from the outside while the following vehicle is positioned diagonally behind the lead vehicle. Neither the pedestrian nor the following vehicle sees each other. The pedestrian darts across hurriedly, and the following vehicle accelerates hastily, only to find the pedestrian emerging from the front of the lead vehicle when overtaking. Encountering the pedestrian at that moment leaves no chance for survival. A few years ago, on CCTV, there was footage of a pedestrian being hit, flying 2-3 meters high, spinning two or three times in the air, and dying instantly. Such dangers are common on semi-closed expressways, so please do not underestimate them.
The 3517CF2-010 type parking brake valve (also known as a hand control valve) is produced by Chongqing Diesel Auto Parts Factory. This valve is available as an option on Dongfeng, Jiefang, Steyr, and other series diesel vehicles. Its working principle (see Fig. 3-5) is as follows: when the handle is within the 0~10 degree range, the diesel vehicle's parking brake is fully released, and the vehicle is in motion. When the handle is at the 73-degree locked position, the train is in a fully braked state. When the handle is at the 82-degree inspection position, the tractor's parking brake is in a braked state, but the trailer is in a fully released state.
When the handle moves from 73 degrees to 0 degrees, the handle cam pushes the large piston F downward, compressing the balance spring 6, pushing the piston 2 down, closing the exhaust valve 4, fully opening the intake valve 5, and opening the intake valve 3 of the auxiliary valve. Compressed air from chamber C enters chamber A and then splits into two paths: one enters the spring brake chamber to release the tractor's parking brake; the other enters the trailer brake valve to release the trailer's parking brake. When the handle is within the 0~10 degree range, the diesel vehicle's parking brake is in a fully released state.
When the handle moves from 0 degrees to 55 degrees and 73 degrees, the large piston F, balance spring 5, and balance piston 2 move upward, opening the exhaust valve 4 and closing the intake valve 5; the auxiliary valve intake valve 3 closes. The output air pressure decreases linearly to zero as the handle angle increases. When the handle is within the 55~73 degree range, the entire diesel vehicle is in a fully braked state. When the handle is at 73 degrees, the entire diesel vehicle is in a fully braked state, and the handle is locked.
When the handle reaches the 82-degree inspection position from 73 degrees, the intake valve 3 of the auxiliary valve opens, releasing the trailer's braking function. At this point, the ability of the diesel vehicle to maintain parking on a slope using only the tractor's parking brake can be checked. When the handle is released, it automatically returns to the parking brake lock position.
Faults: When the handle is within the 0~10 degree range, the vehicle's parking brake is fully released, and the vehicle is in motion. If the trailer brake chamber does not release, and the higher the air pressure, the greater the pressure in the brake chamber, it indicates that the air pressure from chamber A of the control valve has leaked into chambers B and D, entering the trailer brake chamber. This is due to aging and damage of the internal piston O-ring seal or foreign objects in the chamber causing leakage. Inspection and replacement of damaged parts in the lower body and middle body can address this.
When the hand control valve moves from 0 degrees to 55 degrees and 73 degrees, if there are foreign objects inside, O-ring seals are damaged, pistons are worn, or there is jamming in the internal cavity or at certain points, normal braking effects cannot be achieved.
Removal: Remove the bolts from the bottom cover of the hand control valve, extract the internal cavity piston, inspect, clean, and reassemble it properly. The specified service life of the hand control valve is approximately 50,000 km, requiring disassembly for comprehensive inspection without dedicated repair kits, providing convenient conditions for maintenance.
Adjustment:
(1) Place the handle in the parking brake lock position, inflate the inlet N to reach a pressure of 800 kPa, maintain for 5 minutes without leaks, although slight leaks at the exhaust port are allowed.
When the handle is moved to the 10-degree position, the air pressure at the outlet must drop to 550~620 kPa; when the handle is at the 73-degree position, the air pressure at the outlet must drop to zero. Release the handle, and it should automatically return to the driving position. At this point, the air pressure at the outlet must be 800 kPa. The above content is jointly released by the Official Website of Sanitation Garbage Trucks (http://www.clwlu.com/)|www_clwlu_com and Garbage Truck Manufacturer (http://www.clwwcw.com/)|www_clwwcw_com. For more exciting content: Garbage Truck Manufacturer 2 uses computer networks and database technology, requiring equipped distances. The first troubleshooting method for transmission shaft faults in articulated aerial work platforms is to check the battery as well.