1. Case Study #05
Boom sheaves replacement – pylon - CQB
1. Slack & secure boom wire ropes. 3. Dismantle all sheaves “3 sheaves” .
2. Dismantle shaft. 4.Assemby of new sheaves and new sleeves .
2. 5.Assemby of new sheaves in its place .
4.1 Fabricate a special frame to assembly new
sheaves.
6.Assemby of new shaft.
3. 7. Assembly of end sleeve and end plate 8. Assembly stopper plates and lubrication
Note:
During assembly process, we found the precession
and tolerance between the new sleeves and the new
shaft not matching, so we machining the sleeves
from inside at an external work shop to get the design
and allowable precession required.