Howden WRV - Page 46

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8.4 DISMANTLING 204, 255, 321 & 365 COMPRESSOR FOR MAJOR OVERHAUL (Continued)
Fig. 64
Fig. 65
Rotor
Size
Estimated Weights
Male
Female
lbs
Kgs
lbs
kgs
204/1.10
128
58
98
44
204/1.65
171
78
131
59
255/1.10
267
121
231
106
255/1.65
353
160
298
135
255/2.20
437
198
364
161
321/1.32
527
239
435
197
321/1.65
630
286
515
234
321/1.93
763
346
593
269
365/1.65
990
450
770
350
365/1.93
1111
505
891
405
Fig. 67. Rotor Weights
The thrust bearing sleeves and the angular contact thrust bearings can now be easily removed. The
balance piston and balance piston sleeves are now accessible and, with the aid of the screwed ‘T’
bars, (see Special Tool List, Section 9.3) the pistons and sleeves are removed.
The journal bearings can now be extracted from the Main and Inlet casings using an extractor tool.
See Tool List Section 9.3.
Fit new journal bearings using assembly tool in preparation for re-assembly.
The journal bearings are located by a dowel pin and are retained by circlips.
Fig. 66