KAMAZ gearshift scheme: features and recommendations

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

The peculiarity of driving a KamAZ car is that it has a gearbox, which requires additional knowledge and skills to operate. The KamAZ gearshift scheme in the box of the ZF-9S model has a feature: the ride is carried out mainly in a lower gear. It allows the vehicle to move with large loads at optimal speed.

Gearbox device

Most models of KamAZ vehicles have a 5-speed manual transmission. Speed control is carried out by working with the clutch pedal. Taking into account the fact that the car is designed for freight transportation and initially has a large mass, gear shifting on KamAZ is carried out in several stages. There are 2 operating modes of the box: primary (H) and secondary (B). The switch between them is a lever located on the gear knob. To drive in light mode, it must be in the lowered position, the movement with the load is carried out bylever up.

Start of movement

Starting off is carried out in low gear. Switching is carried out only when the clutch is disengaged. The KamAZ gearshift scheme on the ZF box involves switching in several stages. This is expressed in the features of upshifts and downshifts. So, the car can quickly move on various types of road surface. The optimal scheme is considered to be 1B-2B-3B in the first stage, 4H-4B-5H in the subsequent movement. Based on this scheme, it is necessary to get under way from the first downshift, i.e. it is not necessary to change the position of the lever on the gearbox until the 4th gear. In order for the car to move, it is necessary to bring the crankshaft speed to 7 thousand revolutions. The second gear is engaged when the speed is increased to 3000 rpm (number 3 on the tachometer).

It should be noted that the operation of the crankshaft in KamAZ vehicles plays a key role. Shifting gears in time can significantly reduce fuel consumption and keep the engine running economically without significant downtime.

Peculiarities of shifting while maneuvering

The movement of the KamAZ car downhill must be carried out in high gear. Switching from first gear to second is carried out by double depressing the clutch. In this case, a single press on the fuel supply pedal should be carried out in order to stabilize the operation of the crankshaft. It is not recommended to reduce engine speedbelow 2 thousand when driving uphill. This, on the one hand, can contribute to engine stalling, and on the other hand, its operating temperature can reach a critical point, which will disable the engine.

This is the peculiarity of driving a KamAZ car. The gearbox, the shifting pattern of which is well studied and carried out in this form, is distinguished by directional stability. The main point of dividing it into 2 modes is to facilitate the operation of the engine when driving a car with different masses. Starting off on a loaded KamAZ (or with a trailer) is carried out in high gear with a crankshaft speed of 2600 rpm.

Features of driving on slopes and icy roads

On steep descents, it is forbidden to turn off the engine. This may cause the vehicle's steering wheel to lock up as the electric power steering is not active. The brake system of the machine has a double reinforcement - in addition to engine braking, there is an auxiliary engine stop system. When driving on slopes with active auxiliary braking, it is forbidden to disengage the clutch and change gears. So, the KamAZ gearbox scheme on transmissions of the ZF and DT models is performed in an unconventional form. For example, it is possible to distribute the load on the active parts of the transmission as much as possible. This makes it possible to descend the slope without harming the engine (even at maximum load).

Movement on a slippery track is carried out with a maximum power reserve andspeed. Braking must be done with the auxiliary engine stop system active. During emergency braking, the trailer wheels are stopped first. This is important to consider in order to avoid skidding a car. In exceptional cases, you can slow down the engine (this harms the motor, but the length of the braking distance is significantly reduced). Also, the wheels must not be allowed to slip. To do this, it is necessary to engage a lower gear in time, thereby reducing the frequency of rotation of the crankshaft relative to the transmission.

Gearbox control in case of skidding of the car

The basic rule is not to disengage the clutch if the car is off course. The gearshift scheme of KamAZ on a mechanical transmission of the DT model is performed in such a way that it allows you to move with a maximum power reserve. Such a system is able to stabilize the course when driving on different road surfaces. So, in the event of a skid, the steering wheel must be turned in the direction the car is pulling. If it happened that KamAZ stalled, you must immediately stop further movement. The first step is to turn off the differential bridge. The regulator is located on the instrument panel. A confirmation in the form of a burning light bulb will pop up about its deactivation. You need to start moving from a higher gear (from the second). After leaving the hard-to-reach area, the differential must be turned on again.

Final tip

It is important to monitor the condition of the tachometer. This is not necessary when driving a car. The KamAZ gearshift scheme on all known types of transmissions ensures minimal fuel consumption. In particular, a competent upshift or downshift while monitoring the operation of the crankshaft helps to increase the speed of the machine (by maintaining high speeds, no time is wasted to stabilize the engine), and also reduces the risk of engine overheating. In general, the KamAZ gearbox, the switching method and the control features do not differ from those on a passenger car. You just need to remember some of the nuances of the box.