Farr HD8625, Technical Manual

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T
echnical
M
anual
hD8625 8-
5
/
8
” 35K T
ong
6.5
T
orque
M
easureMenT
B. 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.
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
1. Symptom: No indication on gauge.
Possible Problem: Obstruction in hydraulic hose.
Solutions: Check hydraulic hose for kinks.
Replace hydraulic hose.
Possible Problem: Loss of hydraulic fluid.
Solution: Recharge hydraulic fluid (see Section 6.C). NOTE: Ensure any breaches in the hydraulic system
between the load cell and torque gauge are repaired to prevent further fluid loss.
Possible Problem: Internal mechanism of torque gauge is damaged.
Solution: Replace gauge.
2. Symptom: Gauge indication unexpectedly high.
Possible Problem: Excessive hydraulic fluid.
Solutions: Completely drain hydraulic fluid from torque gauge/load cell system. Recharge following the
procedure in Section 6.C.
Possible Problem: Internal mechanism of gauge is damaged.
Solution: Replace gauge.
Possible Problem: Incorrect torque gauge in use (not part of the original torque gauge/load cell pair).
Solution: Replace gauge with gauge properly calibrated for the load cell in service.
3. Symptom: Gauge indication unexpectedly low
Possible Problem: Insufficient hydraulic fluid.
Solution: Recharge hydraulic fluid (see Section 6.C). NOTE: Ensure any breaches in the hydraulic system
between the load cell and torque gauge are repaired to prevent further fluid loss.
Possible Problem: Obstruction in hydraulic hose.
Solutions: Check hydraulic hose for kinks.
Replace hydraulic hose.
Possible Problem: Snub line not at right-angle to tong handle.
Solution: Check angle of snub line and correct if necessary.
Possible Problem: Internal mechanism of gauge is damaged.
Solution: Replace gauge.
Possible Problem: Incorrect torque gauge in use (not part of the original torque gauge/load cell pair).
Solution: Replace gauge with gauge properly calibrated for the load cell in service.
4. Symptom: Gauge indication is erratic or sluggish
Possible Problem: Insufficient hydraulic fluid in torque measurement section.
Solution: Recharge hydraulic fluid (see Section 6.C). NOTE: Ensure any breaches in the hydraulic system
between the load cell and torque gauge are repaired to prevent further fluid loss.
Possible Problem: Loss of damping fluid in torque gauge.
Solution: Top up or refill damping fluid (NOTE: Ensure leakage points in gauge are identified and repaired
to prevent further loss of damping fluid).
Possible Problem: Air bubbles in hydraulic fluid in the torque measurement system.
Solution: Bleed air from load cell and torque gauge and top up fluid (if necessary) as per Section 6.C.
Possible Problem: Internal mechanism of gauge is damaged.
Solution: Replace gauge.