SWDM40 OPERATION & MAINTENANCE MANUAL
Note：
In some occasion, fatigue is the main cause of a damaged wire rope. Even if no
defective part can be found on the appearance, maybe internal broken wire exists.
Above inspection is qualified, and it’s the replacement time, so change the wire rope
with a new one.
When discarding a wire rope, figure out whether the damage is caused by the
mechanism, eliminate these defects before changing a new wire rope.
8.3.9 Checking Swivel Joint for Flexibility
Check swivel joint for flexibility before or after work every day. A swivel joint with good
performance can be turned by hands easily.
1 ） Lower the drill mast to level position. Pay attention to Rotary drive and Kelly to avoid
difficulty in erecting mast caused by gravity rearward, or Rotary drive slipping out caused by
rearward inclination.
2）Turn main winch to loose the end of wire rope linked with swivel joint rotating the swivel
joint freely. During the turning process, keep the wire rope with proper tension to avoid rope
disturbing for the main winch.
3）Secure one end and turn the other, if turning freely, the performance is good. After the swivel
joint is greased, it still doesn’t turn, repair or change it.
Note：
During operation, after swivel joint is lifted out from the drilling hole, it always
rotates in high speed, observe this carefully. If it doesn’t rotate, shut down the machine to
check.
8.3.10 Lubrication of Wire Rope Swivel Joint
Note：
Dirty objects containing fine sediment is easy to enter into the swivel joint, that
will abrade bearing, reduce swivel joint in flexibility, use performance and
stability.
Regularly check swivel joint for oil leakage, if found, change seal.
Accidental Kelly dropping occur, the swivel joint should be checked immediately.
The swivel joint structure include following two types, please maintain it properly according to
the actual shape.
Structure one is shown as below:
1）Lubricating method:
Unscrew the plug on two ends of swivel joint, inject lubricating oil into grease cup as shown in
following figure till it flows out from the other end.
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