80-0420-23 POWER TONG
Manual № TM12012
Section 8
Page 8.5
©2008-2017 McCoy Global
Torque Measurement
8.1 TROUBLESHOOTING
Under normal operating conditions, and with proper maintenance, the torque gauge and load cell system are designed
to give lasting trouble-free performance. Faulty indication on the gauge will very often define a fault within the gauge.
1 SYMPTOM: NO INDICATION ON TORQUE GAUGE
POSSIBLE PROBLEM SOLUTION(S)
Hydraulic hose is obstructed
Check hydraulic hose for kinks
Replace hydraulic hose
Loss of hydraulic uid
Recharge hydraulic fluid (see Section 8.2). NOTE: Ensure any breaches in
the hydraulic system between the load cell and torque gauge are repaired
to prevent further fluid loss.
Internal mechanism of torque gauge is dam-
aged
Replace gauge
2 SYMPTOM: GAUGE INDICATION UNEXPECTEDLY HIGH
POSSIBLE PROBLEM SOLUTION(S)
Excessive hydraulic fluid
Completely drain hydraulic fluid from torque gauge/load cell system.
Recharge following the procedure in Section 8.2
Internal mechanism of gauge is damaged Replace gauge
Incorrect torque gauge in use (not part of the
original torque gauge/load cell pair)
Replace gauge with gauge properly calibrated for the load cell in service
3 SYMPTOM: GAUGE INDICATION UNEXPECTEDLY LOW
POSSIBLE PROBLEM SOLUTION(S)
Insufficient hydraulic fluid
Recharge hydraulic fluid (see Section 8.2). NOTE: Ensure any breaches in
the hydraulic system between the load cell and torque gauge are repaired
to prevent further fluid loss
Obstruction in hydraulic hose
Check hydraulic hose for kinks
Replace hydraulic hose
Snub line not at right-angle to tong handle Check angle of snub line and correct if necessary
Internal mechanism of gauge is damaged Replace gauge
Incorrect torque gauge in use (not part of the
original torque gauge/load cell pair)
Replace gauge with gauge properly calibrated for the load cell in service
4 SYMPTOM: GAUGE INDICATION IS ERRATIC OR SLUGGISH
POSSIBLE PROBLEM SOLUTION(S)
Insufficient hydraulic fluid in torque measure-
ment section
Recharge hydraulic fluid (see Section 8.2). NOTE: Ensure any breaches in
the hydraulic system between the load cell and torque gauge are repaired
to prevent further fluid loss
Loss of damping fluid in torque gauge
Top up or refill damping fluid (NOTE: Ensure leakage points in gauge are
identified and repaired to prevent further loss of damping fluid)
Air bubbles in hydraulic fluid in the torque
measurement system
Bleed air from load cell and torque gauge and top up fluid (if necessary)
as per Section 8.2
Internal mechanism of gauge is damaged Replace gauge
NOTICE
IF TROUBLESHOOTING REVEALS THAT THERE IS INSUFFICIENT FLUID IN THE SYSTEM, BEFORE
RECHARGING, CHECK THAT ALL SYSTEM COMPONENTS ARE FREE FROM DAMAGE. THIS WILL
ENSURE THAT FLUID LOSS WILL NOT CONTINUE AFTER RELOADING.
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