Farr HD8625 - D. TONG RUNNING TOO SLOWLY

Technical Manual
hD8625 8-
5
/
8
” 35K Tong
4.5
TroubleshooTing
D. TONG RUNNING TOO SLOWLY
POSSIBLE PROBLEM SOLUTION(S)
1
Obstruction in tong hydraulic circuit preventing
adequateflow
Inspectself-sealingcouplingstoensuretheyareproperlyengaged
Themainhydrauliclines(supplyanddischarge)tothetongareobstructed.Remove
andcleanifrequired
2
Power unit is not producing adequate flow or
pressure
Troubleshootpowerunit(seeuser’smanualforyourparticularunit)
3
Tong motor is excessively worn and is leaking
hydraulicfluidpastthevanes
Replacemotor,orrebuildasperSection7ofthismanual
4
Bearings in gear train and rotary section are
excessivelyworn
Overhaultong.SeeSection3ofthismanualfortongoverhaulprocedures
5
Shifterhasmalfunctionedandthetongisnotshift-
ingtohighgear
Inspectandrepairshiftmechanismasnecessary
6 Hydraulicfluidviscositytoohigh
EnsurehydraulicfluidmeetsMcCoyDrilling&Completionsspecifications
Ensurehydraulicfluidisappropriateforclimaticconditions,especiallyduringcold-
weatheroperation
7 By-passvalvenotfunctioning Checkandrepair