42
8.4
DISMANTLING 204, 255, 321 & 365 COMPRESSOR FOR MAJOR OVERHAUL (Continued)
If the journal bearing clearance inspection shows the bearing diametrical clearance is less than the
maximum allowable, (see Fig. 55), the advantages of a further period of trouble free running with
new journal bearings should be considered before deciding to re-use the existing bearings.
Compressor
Size
Drawing Clearance
Maximum
Allowable
Clearance
mm
Inches
204
0.070/0.110
0.0028
”/0.0043”
0.150mm/0.006”
255
0.095/0.136
0.0037
”/0.0054”
0.180mm/0.007”
321
0.130/0.170
0.0052
”/0.0068”
0.226mm/0.009”
365
0.175/0.220
0.0069
”/0.0087”
0.295mm/0.012
”
Fig. 55 Journal Bearing Clearances
Removing the Input Shaft Seal
After the driven half coupling and key have been removed, extract the cap screws from the shaft end
cover and using the jacking holes provided and using ‘T’ bar jacking tools, remove the shaft cover
(Fig. 56).
Fig. 56
Summary of Contents for WRV
Page 1: ...WRV WRVi COMPRESSOR RANGE SERVICE MANUAL...
Page 3: ...2 SECTION 1 FOREWORD...
Page 5: ...4 HOWDEN SECTION 2 DESCRIPTION...
Page 10: ...9 SECTION 3 INSTALLATION...
Page 14: ...13 SECTION 4 FIRST START UP...
Page 16: ...15 SECTION 5 NORMAL OPERATION...
Page 18: ...17 SECTION 6 PROCEDURES DURING SHUTDOWN...
Page 20: ...19 SECTION 7 MAINTENANCE...
Page 33: ...32 SECTION 8 OVERHAUL...
Page 50: ...49 SECTION 9 SPECIAL INSTRUCTIONS...
Page 57: ...56 SECTION 10 SPARES...
Page 64: ...63 Printed in the UK Issue HCL September 2012 Howden Compressors Limited...