33
8.1
GENERAL PROCEDURES
Although a yearly inspection and maintenance programme is recommended if no condition
monitoring equipment is fitted, it is essential that a major overhaul is carried out after approximately 4
years operation or earlier, dependant on site conditions.
To carry out a major overhaul proceed as follows:
1.
If necessary, isolate, depressurise and purge the system.
2.
Disconnect the driving and driven half coupling.
3.
Disconnect all gas and oil pipes attached to the compressor.
4.
Remove the ¾” or 1” BSP taper plug from the bottom of the inlet end cover, and collect the
oil which drains off.
5.
Remove the gas inlet strainer.
6.
Remove the dowel pins (if fitted) and the holding down bolts from the compressor feet.
7.
Lift the compressor to the location, which should be a clean, dry area, where dismantling
and assembly will take place.
Notes about Dismantling and Re-assembly
The dismantling and assembly method varies slightly between the WRV163 & WRV204 compressors
and the WRVi255, WRVi321 & WRVi365 compressors due to differences in construction. It is,
therefore, essential the correct procedure is used for the size of compressor involved.
Reference should always be made to the Sectional Arrangement drawing supplied.
Use only proper locknut spanners to avoid damage to the locknut slots.
Special tools to facilitate assembly and dismantling operations can be supplied on request.
A list of special tools is located in Section 9.3 of this manual.
All lockwashers,
tabwashers, ‘O’ rings and PTFE seals must be renewed on assembly.
All lockwashers must be assembled according to the procedure as described per Section 9.2.
All fasteners should be torqued to the specified values as stated under Section 9.1.
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...