Do-it-yourself Kirovets checkpoint repair

Vthe driving shaft is recommended to be disassembled on a hydraulic stand OGT-3985 or by means of pullers.

PThe procedure for disassembling the drive shaft of the Kirovets tractor gearbox (K-700, K-700A, K-701, K-702):

1) - Install the shaft vertically so that the end of the shaft (on the side of the first gear) is at the top;

2) – Unlock and then unscrew the screw (22) [fig. one];

3) – Unscrew the nut (21) with the spring (25);

4) - Dismantle the sealing ring with the washer;

5) – Screw the dismantling bolt into the oil line (4) and press out the oil line;

6) – Using a puller, grasp the pressure plate (32) of the first gear clutch, then press it together with the right shaft support assembly;

7) - Remove the right disk (6) from the shaft;

8) - Press the gear (2) complete with bearings;

9) - Unscrew and then remove the nut securing the middle drum (3) from the shaft;

10) - Press pressure plate (36) and middle drum (3) with discs;

11) - Dismantle the middle disc (37) as an assembly;

12) – Unlock and then unscrew the bolts (33);

13) – Dismantle the middle support (38);

14) - Install the drive shaft so that the end of the shaft (on the fourth gear side) is at the top;

15) – Remove the oil line (57) from the shaft [fig. 2], left support (53), fourth gear clutches, gear (20), third gear clutch, and disk (20);

16) - Dismantle the middle support (33) as an assembly and the ring (32);

17) – Press the inner race of the bearing (34);

18) – Dismantle half rings (35);

19) - Disassemble the assembly units removed from the shaft;

Rice. 1. Drive shaft (I and II gears) of the gearbox of the Kirovets tractor K-700, K-700A, K-701, K-702.

Video (click to play).

5), 13), 15), 18) – O-rings;

11), 12) - Intermediate rings;

30), 35) - Discs with internal teeth;

31), 34) - Disks with external teeth;

Rice. 2. Drive shaft (III and IV gears) of the gearbox of the Kirovets tractor K-700, K-700A, K-701, K-702.

10), 12), 19), 30), 37), 44), 45), 46), 61) – O-rings;

The K-700 car (Kirovets) is a wheeled tractor manufactured by the Kirov Plant, which has an increased cross-country ability. Its main purpose is deep loosening of the soil, sowing. Also, this technique can act as a tractor.

The engine power on the K-700 tractor reaches 220 horsepower. The first versions of this technique became available in the early 1960s. Excellent traction qualities of the tractor are provided by enlarged radial tires. The control drives and the hydraulic system are designed for heavy loads.

Since the mid 1970s. the following versions of Kirovets appeared: K-700A, K-701. They are equipped with the following types of engines: YaMZ 238, 240. The fuel system available on the tractor includes fine and coarse filters. The engine does not lose its working properties when the equipment is operated in difficult conditions.

The installed four-stroke 8-cylinder engine YaMZ-238NM is fixed on the front half-frame. The K-700 tractor is capable of speeds up to 33 km/h. The weight of various modifications of this version of the tractor varies. In particular, the mass of the vehicle is affected by the mass of the engine.

The K-701 tractor with the YaMZ-240BM2 engine produces 300 horsepower and is an excellent alternative to the powerful K-700. This technique has long remained in demand in agriculture. The power plant communicates with the transmission. The transmission includes a cardan gearbox, axles, clutch. These parts are reliable.

With the help of a gearbox on a tractor, the driver can change the speed of this vehicle both forward and backward. The peculiarity of the gearbox on the tractor is expressed in the fact that there is no clutch. The box itself is mechanical, 16 speed (forward), 8 speed back. At the same time there is a possibility of hydraulic control. The gears present have straight teeth, this is well reflected in the scheme of this working device. Gear couplings are mounted on a shaft with gears. They affect gear changes.

The change of speed modes on this technique occurs without delay. The shift mechanism performs the function of controlling the flow of incoming oil. Due to which the fuel is directed to the spool. The body of the gear shift mechanism is cast iron. There are special channels that are necessary for the direct distribution of circulating fuel flows. Responsible for gear shifting on the tractor is such an auxiliary element as the drive shaft.

The crankcase includes the pedal and control levers. The gearbox has several shafts. The input shaft is driven by a metal flat disk. The intermediate and cargo shafts differ in work efficiency (refer to the lower part of the crankcase). It should be noted that the load shaft is mounted on bearings. On the existing driven drums of 1st and 4th gears, special synchronizer brakes are installed.

The fork of the cargo shaft clutch control drive is fixed on the reverse clutch. It provides quick engagement and disengagement of reverse gear.

Thus, the operation of the K-700 tractor helps to increase the productivity of agricultural work. The ground clearance of the tractor is 440 mm. This circumstance ensured good permeability of this technique. It should be noted that gear shifting is carried out without loss of working power.

Malfunctions and breakdowns in the gearbox in most cases occur as a result of wear of the component parts and individual spare parts available here. Signs of when a K 700 checkpoint repair is needed:

• difficulty switching gears;
• spontaneous gear shifting;
• oil leak;
• jerks;
• knocks, noises from the side of the box.

With any of these manifestations, the owner of Kirovets must conduct a general diagnosis of the transmission.

Difficulty in shifting gears may be the reason that the synchronizer brakes have become unusable. The reason for the jerking may be due to the fact that the fasteners have loosened. Also, adjusting the gearbox control drive can resolve the breakdown that has occurred.