TEDA XQ140 - Page 24

MODEL XQ140/20 HYDRAULIC POWER TONG OPERATION MANUAL
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
Common
troubles
causes
Remedy
Low rotating
speed, but oil
outlet is normal.
1 Low discharge of hydraulic pump.
Adjust oil supply to 120L/min.
2 Viscidity of hydraulic oil too high
or too low.
Replace oil or heat up (esp. in
winter)
3 Worn of pump or motor.
Replace pump or motor.
4 Hand control valve can’t slide
Adjust again.
Low rotating
speed, high
pressure of oil
outlet.
Check valve of quick coupling can’t
be completely turned on or pipe
blocked.
Replace quick coupling or
clean the pipe.
Rotation of tong
head sometimes
slow, sometimes
fast.
Not enough oil sucked by the
hydraulic pump, air gets into the oil
passage.
Clean the filter core or make
up the amount of the
hydraulic oil.
The motor
rotates, while
the tong head
doesn
’
t rotate.
The transmission axle or gear
damaged.
Replace damaged parts.
Gears on both
sides of the
opening gear are
easily stripped
off
Upper and lower centralizers are
severely worn.
Replace centralizers in time.
Backup tong
clamps only in
one direction.
Rack plunger not in the central
position when jaw plate frame and
the opening of backup tong main
body are in alignment.
Dismount backup tong and
reassemble.
Making up or
breaking out too
sensitive.
The valve tail nut of hand control
valve gets loose.
Tighten the nut.
Gear
engagement not
fast,
disengagement
occurs easily.
1.Not pushed to the right position.
Correct operation.
2.Pressure on the positioning seat
from spring not enough.
Replace spring.
Low output
torque.
1 Low system pressure.(such as
overflow valve not properly
adjusted or damaged)
Adjust system pressure.
2.Pressure of pressure adjusting
valve of the head control valve is
adjusted too low.
Adjust at 12Mpa by special
technicians.
Oil leakage from
the sealing parts
1.Lake of oil in the sensor cylinder.
Add oil to the senor cylinder.
2.Torque meter damaged.
Replace the torque meter.
Torque gauge
not work
1 Torque gauge is damaged
Change torque gauge
In case troubles still can’t be solved, please contact our service staff.