MODEL XQ140/20 HYDRAULIC POWER TONG OPERATION MANUAL
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
5.3 Breaking-out operation steps
(based on right hand thread, left hand thread is on the
contrary.)
□
Hydraulic power tong does racing, make it back to preliminary working state.
Select proper gear according to actual requirement (usually low gear).
□
Turn the reset knobs of the master tong and backup tong to breaking-out
direction; make sure the knobs point in the same direction (see Fig.28).
□
Open the safety door, push hydraulic power tong towards the pipe string, and
make sure the clamping position of master tong and backup tong is proper.
□
Close the safety door.
□
Pull the tong tail to make tong turn around the rotating center, tighten the back
guy.
□
Pull the hand control valve operating lever gently to start breaking-out operation.
□
Continue breaking-out operation till all screws thread out, then release operating
lever.
□
Push hand control valve operating lever to make tong back to the preliminary
working state.
□
Open the safety door, push tong back to the preliminary position. One
breaking-out operation is finished.
5.8 Installing rack plunger
Remove the upper cover of the backup tong (XQ20-210), duplex gear (XQ20-230
and cylinder cover (XQ20-244), push out the rack plunger, install Yx seals at two ends of
the cylinder liner, then push rack plunger to the center of cylinder liner, finally install
duplex gear and other parts when the jaw plate frame (XQ20-214)faces the opening of
the backup tong. (see Fig. 5-7)
Over torque can damage casing as well as the hydraulic power
tong!
Don
’
t make-up or break-out before the safety door is closed well !
During the breaking-out operation, the max length of the backup
tong moving downward should be longer than the length of the
screw extended out, otherwise the front and back guide pole
should be repaired.
Keep the operating area of the power tong clean to prevent
sundries in. Tidy the hydraulic hose, electric wire, and signal line to
avoid twisting or getting cut off.
