When assembly，the bearing assemblies must be preheated and the temperature must not be more then 120℃. Double rows，tapered，roller bearings are adopted for the lower bearing and their cone，pup and position sleeve is assembled in set，which can not be interchangeable with corresponding parts of the same kind of bearing. When the lower end cover of bearing is assembled，it must be noted that the surface of lip seal in recess of lower end cover should be outward and the oil retainer，etc. must agree to the position in assembly drawing. When piston ring is assembled，it must be noted that the mouth of the piston ring should not be overlapped at the direction of diameter. Because axial clearance has been ensured by bearings themselves，the clearance of the bearing assembly of the sump pump should not be adjusted in the assembly. But after assembly，it is suggested that the end face clearance in installation should be checked according to the following values in Table 1.
Table 1
Bearing assemblies | End face clearance (mm) |
PV | 0.074-0.160 |
QV | 0.114-0.208 |
RV | 0.084-0.211 |
SV | 0.064-0.206 |
TV |
|
