Remove the following:
Carefully observe the structure of the various parts of the outside of　the gear unit, consider the following questions from the observation:
1, how to ensure a sufficient rigidity to support the envelope
2, the upper and lower sides of the envelope bearing bolt connection shall be arranged how
3, supporting the bolt boss height should be how to determine
4, how to reduce the weight of the envelope and the envelope to reduce the processing area
5, reducer attachments, such as hooks, locating pins, screws decapper oil standard, oil plug, where the role of the ventilation holes and other observations from, how its structure, how reasonable layout, observation hole with a wrench to remove the cover, consider the appropriateness of the observation hole location, size is appropriate.

Removing compartment lid
1, with a wrench to remove the bearing cover fastening screws.
2, with a wrench or socket wrench to remove the lower bolt connection between the envelope;. Positioning pin will be removed screws, bolts, washers, nuts and pins, etc. on the plastic tray to avoid losing and then twist the lid open. Remove the compartment cover screws.

Careful observation car body structure and location of the various parts of the following questions from the observation:
1,How one of the adjustable bearing axial clearance should be how to adjust to compensate for thermal expansion of the shaft
2, the bearing is lubricated how to combine surfaces such as box seats are oil groove, the car should be taken to cover the corresponding structure of how to make the car cover oil into the oil groove oil groove There are several methods of processing methods are not working at the same time, What different shapes oil groove
3, in order to ditch the oil through the oil into the bearing, the bearing cap structure should be how to design the conditions under which use of rolling bearings inside or seal oil slinger ring on how its action principle, construction and installation location
4, the contents of the relevant experimental measurements listed in three dimensions, and recorded in the table.
4 Remove the bearing caps; along the shaft and shaft parts removed from the box seat with the shaft, the shaft at a reasonable part of the demolition order.

Assembly:
As is the gear assembled press after the first internal logical sequence performed outside the assembly;. Mounting sleeve and rolling bearings, should pay attention to the direction; should be noted that a reasonable method of rolling bearings after dismantling the instructor check to close the lid. . the assembly, connecting bolts should be preceded by lower tank installed between the positioning pin.