TEDA KT14000, Maintenance And Operation Manual, Page: 16 / 61

Model KT14000 power casing tong maintenance and operation manual
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
12
5. Problem diagnosis
Trouble Causes Remedy
The head doesn’t turn l. No pressure from hydraulic station.
2. Damage of the hydraulic reversing valve.
3. Gear changing system fails.
l. Check the station. Add pressure.
2. Replace the valve.
3. Repair
Speed is not enough
l. Low pressure or low flow from the power
station.
2. Bad leakage loss from oil motor or
hand-reversing valve.
l .Check the station pressure.
2. Replace the motor or
hand-reversing valve.
Head slide
l . Disagreement of the sizes of the jaws and
casing.
2. Tongs not be leveled.
3. Dies worn out.
4. Die notch filled with oil dirt.
5. Brake band too loose or worn out.
6. Jaw roller failure to turn.
l. Change the jaws.
2. Level the tongs.
3. Change the dies.
4. Get rid of it with a wire brush.
5. Adjust or change the band.
6. Check the roller or oil and
repair the pin shaft.
Torque valve less
than rated
l. Low pressure from the hydraulic power
station or its insufficient oil discharge.
2. Function failure of the hydraulic motor or
of the reversing valve.
3.Insufficient oil in the torque cylinder or the
sealing ring worn out.
4. Torque gauge failure.
l. Deal with it according to the
instruction of hydraulic power
station.
2. Repair or change it.
3. Fill in oil or change the ring.
4. Repair or change the torque
gauge.
Motor is running but
the tong head keeps
still or moves slowly,
or will stop even
loaded light.
l. Gear changing device fails
2.Much leakage loss from the hydraulic
motor or the hand- reversing valve.
3. Gear of gearbox damaged or seriously
worn out.
1. Repair or change.
2.Repair or change the motor and
the valve.
3. Check or repair the gearbox .
6.
Storage recommendations
6.1When storing the tong, an effort should be made to locate the unit in a clean, dry, ventilated area.
6.2The tong, while in storage, should be well lubricated.
6.3Spare moving parts (gears, shafts, etc.), if required to remain in storage for a long period of time, tong
should be coated with a good corrosion inhibitor, and should be stored in a good dry environment.
6.4All O’ rings, seals, packing, gaskets, etc., should be stored in a good moisture proof, air tight container.
6.5All bearings (cam followers, roller bearing, etc.) should be well lubricated and stored in a dust free box
or container, protected from moisture.