Various zero before the assembled parts inspection required.
Idler rollers must be cleaned before entering the assembly.
When welding bearing, requires accurate positioning, welding surface is smooth, no penetration welding, weld defects such as mezzanine; When using cast iron housing, with requirements and tube firmly, without any loose.
When using the labyrinth seal, inner and outer seals were loaded roller, avoid sealing deformation, affecting performance.
Between the bearing inner and outer seal, you should add void of its 2/3 of lithium-based grease.
 
Bearing mounting direction shall make nylon cage opening outwards, care should maintain proper load bearing axial clearance after roll not crushed. Each roller rotating flexible transferred only after the next process.