SWDM40 OPERATION & MAINTENANCE MANUAL
8.5 MAINTENANCE FOR EVERY 50 HOURS
8.5.1 Checking Wire Rope Retainer Parallel with Roller
Check wire rope retainer for abrasion and normal function
Check whether rope retainer is parallel with roller
Check rope retainer mounting bolt for secure
Adjust tension adjustment shaft to have the same pulling force for all springs. Change
worn spring instead of more tension.
Change rope retaining roller, shaft, sleeve and retaining ring if gap is too large.
Change rope retaining roller if serious abrasion is found on its surface.
8.5.2 Checking Slewing Bearing Junction Bolts
●Slewing bearing junction bolts are applied with anti-loose glue. Normally, no need to tight up,
visual inspection is enough.
●Bolts with looseness, crack or defects, should be changed. If there’s one loosened, broken or
defective slewing bearing bolt, two bolts on both left and right side should be changed
simultaneously.
● Anti-loose glue should be applied under the surface of lower part of new bolt head.
8.5.3 Checking Bolts Tightening for Key Parts of Rotary drive
Clean Rotary drive with clean water after work to avoid the damage of inner oil seal and other
parts caused by debris or mud attaching on the Rotary drive and penetrating into the internal
with the rotation, and shorten the service lift of Rotary drive.
Check bolt and pin shaft for looseness at initial 10 hours and after that every 50 hours.
Note：
Risk of damaging Rotary drive!
Don’t unscrew these bolts unless necessary, failure to comply may result in bolt
looseness caused by seal glue breakage during operation. Visual inspection is enough.
Visually check cushion device mounting bolts for secure and tank cover mounting
bolts.
Unscrew loosened mounting bolts, apply thread glue onto changed bolt thread and
then tighten with specified torque.
Check Rotary drive housing for bolt breakage when replacing oil.
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