1. Speed change and forward and backward
When shifting gears, you should first push the throttle handle forward to the low-speed idling position, and then push the main clutch lever to the front to disengage the main clutch. Due to the action of the small brake in the main clutch, the power input shaft of the transmission stops rotating. At this time, you can correctly move the shift lever to the required gear, and then put the forward and backward lever in the forward or reverse position (pull the forward and backward lever backward when the bulldozer is moving forward, and push it forward when moving backward). After shifting gears, pull the throttle handle backward to increase the engine speed, and smoothly connect the main clutch, and the bulldozer starts to drive.
When the bulldozer is driving, the main clutch lever should be pulled to the rear and not in the semi-engaged position. Because the semi-engagement of the main clutch will aggravate the wear of the friction plate.
The bulldozer transmission generally has 5 forward gears and 4 reverse gears. The forward and backward lever can be used to change the direction of travel of the bulldozer.
When the bulldozer is operating, it should run at the highest speed possible to improve the operating efficiency. However, the driver should always pay attention to whether the engine is running normally. If the engine is overheated and the exhaust is emitting black smoke, the speed should be appropriately reduced.
2. Steering
When the crawler bulldozer is turning during operation, the steering clutch lever of the steering can be pulled back to disengage the steering clutch, so that the speed of the crawler track on the corresponding side slows down and the bulldozer starts to turn. If you want to make the bulldozer turn sharply, in addition to separating the steering clutch, you should also step on the corresponding brake pedal. Generally, sharp turns are only allowed when running in gear I. When the brake is not in use, the foot should not be placed on the brake pedal, otherwise it will cause the brake belt to wear and increase fuel consumption.
When the bulldozer is turning, the brake pedal should be stepped on smoothly to avoid jumping when turning. After the turn, the brake pedal should be released first, and then the joystick should be released. If the turning radius is large, there is no need to step on the brake pedal. If it is not necessary, do not make the bulldozer turn in place at high speed to avoid accidents caused by derailment of the crawler track.
3. Driving on a slope
Different types of bulldozers have different climbing abilities (generally 30°), and the slopes and terrains that bulldozers of the same structure can adapt to are also different. The driver should be familiar with the climbing limit of the model used to avoid landslides due to insufficient uphill and downhill abilities.
Before going uphill, the appropriate speed gear should be selected according to the terrain, slope size and length, and gear shifting is not allowed during the climb. When going uphill, the bulldozer should run at a vertical angle to the horizontal side of the slope, and horizontal driving is not allowed on steep slopes. The shovel blade can be lowered appropriately to avoid affecting the line of sight, and the shovel blade can be quickly landed to help the bulldozer brake in the event of a landslide.
If the engine stalls during the uphill journey, the fuel supply should be stopped immediately, the shovel blade should be lowered and emergency brakes should be applied. If the machine cannot be stopped on the slope, the reverse gear should be switched to slowly slide to the bottom of the slope (braking and sliding) and then started. If the oil supply is not stopped and the bulldozer slides down in the forward gear, the power will be reversed to the engine and cause a reverse fire, causing the air filter to spray oil outward. In the event of a reverse fire, the throttle should be quickly closed and the bulldozer should be braked. Before restarting, check whether the gear lever is in the neutral position.
When the bulldozer is going downhill, a low-speed gear with a small throttle should be selected, and the brake pedal should be used.
4. Passing cliffs or rocky beaches
When the bulldozer needs to pass through obstacles such as large earth mounds or cliffs, it should be driven up slowly at a low speed. When the body is about to tilt forward at the top, the clutch should be quickly disengaged to allow the front of the bulldozer to land slowly, and then the clutch should be engaged to continue moving forward. It is not allowed to drive diagonally over obstacles, and do not pull the steering rod when driving over obstacles.
When passing through rocky beaches, you should choose a route in advance and drive straight through, with as few turns as possible on the way, and drive at a low speed and with a small throttle. It is not allowed to drive on a bumpy rocky beach with a high speed and a large throttle and make sharp turns.
