This service bulletin provides updated information on the main wheel configurations.
Content of changes:
In the Technical Data section on page 7, the table shall be replaced;

This service bulletin provides the following information:
-    the list of tractor maintenance operations after running-in has been clarified in terms of excluding the operation of changing the transmission oil after running-in the tractor;
-    a new list of tractor fuels and lubricants has been introduced.

Replacement of the 115K5 GOST 8338-75 ball bearing in the 80-1601050-01 shaft, which is part of the clutch housing, with a VZK 1600.01 roller bearing 6-12115 to prevent the transmission of forces through the rolling elements of the bearing during installation and to eliminate bearing failures.

This operation bulletin provides the following information:
-    introduction of a rear lift linkage (RLL) variant 921-4605010-A, which can be installed in place of the RLLs presented in subsection 3.12 “Rear lift linkage” of document 921-0000010B OM;
-    additional operating rules for the front lift linkage (FLL) when performing transport operations and road travel.
Note – This operation bulletin provides information only for the original buckles and lifting rods installed on the RLL 921-4605010-A. The design and adjustment of the lower and upper links of the RLL 921-4605010-A are provided in document 921-0000010B OM.

This operation bulletin provides the following information:
-    new control rules for the sections of the HLL and FLL distributor are presented;
-    information on design changes of the HLL is provided;
-    the procedure for maintenance operations of the hydraulic lift linkage has been refined.

Replacement of the 60210 AUSh1 GOST 7242-81 ball bearing in the 70-1601060 shifter bracket, which is part of the clutch housing, with a VZK 9217.15 roller bearing 42210 (NJ 210) to prevent the transmission of forces through the rolling elements of the bearing during installation and to eliminate failures of the 60210 AUSh1 bearing.

This operation bulletin provides the following information:
-    information on the installation of new design fuel tanks with increased capacity is presented;
-    the grades and volume of fuel used on tractors have been refined.

This operational bulletin clarifies the seat adjustment procedure due to changes in the tractor's seat configuration.

This service bulletin contains the following information:
- Subsection 3.12 "Front driving axle" provides information related to a change in the
design of the Front driving axle (FDA) at the junction of the double joint and the wheel gear
group;
- In subsection 6.4 "Scheduled maintenance service operations" paragraph 6.4.3.3
“Operation 25. Lubrication of the bearings of the FDA kingpin axles" has been changed.
Note – Front driving axles with a modified design are marked with the letter “Б” after the
serial number stamped on the front left tube of the beam.

This operational bulletin provides the following information:
-air cleaning system options in configuration with "KLQ-767" and "REMIZ FVR" air cleaners,along with the existing "REMIZ" air cleaner have been added;
-the inertial pre-cleaner has been replaced by a multicyclone pre-cleaner;
-the procedure for maintenance operations of the air cleaning system has been refined;
-the procedure for maintenance operations of pre-cleaner has been added.

This operation bulletin clarifies information on carrying out the procedure of maintenance service of FDA wheel gear group and clarifies the diagram in the section of the front driving axle (the location of the driven gear has been changed).

This operation bulletin contains the following information:
- rules for operating the air conditioner, maintenance, possible air conditioner malfunctions and instructions for their elimination;
- names and brands of fuels and lubricants used during operation and maintenance of the air conditioner, indicating their quantity and frequency;
- a maintenance operation has been introduced to replace the filter cartridges of the cabin ventilation and heating system.

This service bulletin clarifies the procedure for performing maintenance operations of the air cleaner.