Operating instructions

51

Low-speed shaft thrust disk High-speed shaft

2 - 3 - 4 See table below
5 Impeller clearance to shroud: allows 15.48 mm (0.024 in) forward movement
from thrust position for Frame 3 compressors; 19.35 mm (0.030 in) for Frame
4 compressors.
6 Impeller shimming to be determined at assembly
= Max./min. installation clearances in mm (see table below):


      
221-299
0.1270
0.1016
0.1270
0.1016
0.2921
0.1016
4.8260
0.1016
0.0508
0.0127
0.1270
0.1016
3.9878
0.6528
321-389
0.1270
0.1016
0.1270
0.1016
0.2921
0.2032
0.5588
0.3048
0.0508
0.0127
0.1270
0.1016
3.9878
0.6528
421-489
0.1397
0.1092
0.1346
0.1092
0.2540
0.1270
0.6858
0.4318
0.0737
0.0356
0.1219
0.0965
0.8636
0.6096
521-599
0.1753
0.1499
0.1651
0.1397
0.0254
0.1524
8.8900
6.3500
0.0787
0.0432
0.1575
0.1321
1.3462
1.0922

  
2 Bull gear retaining bolt 08-115
3 Demister bolts 20-26
4 Impeller retaining bolt 60-62
* Oil heater grommet nut 14
* Guide vane shaft seal nut 34
* Motor terminals 60
* Motor terminals (high voltage) -
Insulator 2.7 - 5.4
Packing nut 6.8
Brass jam nut 13.6
* Not shown

- All clearances for cylindrical surfaces are diametrical.
- Dimensions are with rotor in thrust position.
- Dimensions shown are in mm.
Compressor transmission area
Thrust
Thrust