Farr 80-0420-16, Technical Manual

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KT5500 5-
1
/
2
” T
ong
& CLInCHER® B
aCKup
S
ECTIon
C
onTEnTS
4.4
T
ECHnICaL
M
anuaL
T
RouBLESHooTIng
C. TONG RUNNING TOO SLOWLY
1. POSSIBLE PROBLEM: Obstruction in tong hydraulic circuit preventing adequate flow.
SOLUTION: Inspect self-sealing couplings to ensure they are properly engaged.
SOLUTION: The main hydraulic lines (supply and discharge) to the tong are obstructed. Remove and clean if required.
2. POSSIBLE PROBLEM: Power unit is not producing adequate flow or pressure.
SOLUTION: Troubleshoot power unit (see user’s manual for your particular unit).
3. POSSIBLE PROBLEM: Tong motor is excessively worn and is leaking hydraulic fluid past the vanes.
SOLUTION: Replace motor, or rebuild as per Section 7 of this manual.
4. POSSIBLE PROBLEM: Bearings in gear train and rotary section are excessively worn.
SOLUTION: Overhaul tong. See Section 3 of this manual for tong overhaul procedures.
5. POSSIBLE PROBLEM: Shifter has malfunctioned and the tong is not shifting to high gear.
SOLUTION: Inspect and repair shift mechanism as necessary.
6. POSSIBLE PROBLEM: Two-speed hydraulic motor (if equipped) is not set to correct speed.
SOLUTION: Check motor, and set to the correct speed if required.
7. POSSIBLE PROBLEM: Safety door system is not properly adjusted - hydraulic fluid leak past Deltrol valve.
SOLUTION: Check and adjust safety door system.
8. POSSIBLE PROBLEM: Hydraulic fluid viscosity too high.
SOLUTION: Ensure hydraulic fluid meets McCoy Drilling & Completions specifications.
SOLUTION: Ensure hydraulic fluid is appropriate for climatic conditions, especially during cold-weather operation..
9. POSSIBLE PROBLEM: By-pass valve not functioning.
SOLUTION: Check and repair.