SWDM40 OPERATION & MAINTENANCE MANUAL
Nine Rules for Maintenance and Inspection:
1. Check key bar, crowd block, lower end of drive sleeve for burr, edge curl and grind it
smooth.
2. Check end surface of drive head for abrasion and grind it smooth.
3. Check movable disc for unsmooth abrasion and weld in time or change with a new one.
4. Replace the spring with spot-welding, defects or breakage at once.
5. Check Kelly section surface for crack, if found, stop work at once and ask professional
personnel to repair that.
6. Check Kelly section key bar or steel pipe surface for scratch or abrasion, if found, stop work
at once and ask professional personnel to repair that.
7. Check and tighten servo-frame and bolts at the connection place of shock-reducing rubber.
8. Check whether the drill bit is matched with machine Kelly, and repair or change drill bit in
time.
9. Change lower briquetting of Rotary drive.
7.1.6 Requirements of Long-time Storage and Transport for Kelly
1. When the Kelly is stored for a long time, wide firm level ground is needed, on which three
crossties should be padded. Don’t allow to place it on the ground directly. Don’t keep it together
with soil slag, broken stone and other tiny objects. Don’t place it in wet area, such as in water.
1. After working in alkaline slurry, seawater and clay, wash the Kelly with plenty of clean water
before long-time storage, disassemble it to dry, then assemble to avoid corrosion or stuck. If the
Kelly have been used in the seawater, check each Kelly section surface before reuse, polish its
surface to avoid breakage caused by shocking tiny crack during construction and resulting in
Kelly breakage accident.
2. It’s forbidden to place the servo-frame vertically for a long time, this may result in the
suspension of Kelly middle part, and Kelly deformation caused by the long-time effect of
gravity.
3. When transport, the Kelly should be placed on the crosstie, with anti-extend device installed
on the flat head, and then tied down to avoid accidents caused by Kelly across the machine
body.
7.1.7 After-Sale Service Code for Kelly
After-sale deadline: effective time starts from the shipping day, repair or change according to
the serial number on the Kelly nameplate.
1. Within 2000 hours or one year since the day of purchase (whichever comes first), the Kelly
should be repaired without charge when it can be operated normally but with function failures.
2. For non-standard Kelly (as below table), within 2000 hours or one year since the day of
purchase (whichever comes first), it should be repaired without charge when it can be operated
normally but with function failures.
3. For the Kelly used in abnormal working environment, such as long time working in seawater
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