Troubleshooting - Stanley DL07 Service Manual

Thissectiondescribeshowtofindandresolveproblemsusersmayexperience.Ifasituationoccursthatisnotcovered,
callyourStanleyCustomerServicerepresentativeforassistance.
Inspectingthetoolorinstallingpartswiththehydraulichosesconnectedcanresultinseverepersonalinjuryoreq uipment
damage.
Topreventaccidentalstartup, disconnectthehydraulicpowerbeforebeginninganyinspectionorinstallationtask.
Ifsymptomsofpoorperformancedevelop,thefollowingchartcanbeusedasaguidetocorrecttheproblem.
Whendiagnosingfaultsinoperationofthetool,alwayscheckthatthehydraulicpowersourceissupplyingthecorrect
hydraulicflowandpressuretothetoolaslistedinthetable.Useaflowmeterknowntobeaccurate.Checktheflow
withthehydraulicoiltemperatureatleast80°F/27°C.
Symptom
Tool will not start.
Low drilling
torque.
Low tool speed.
Tool speed too
high.
Oilleaks around
gearhousing.

Troubleshooting

WARNING
Possible Cause
Power notbeingsupplied.
Defectivequick disconnects.
Relief valvesetting toolow.
Fluid restriction in hoseorvalve.
Excessflowandpressure loss.
Fluidflowrateistoolow.
Fluidflowrateisexcessive.
Hydraulicpressure andreturn
hosesreversed.
Main shaft seal o-ringleaking.
Check to make certainthatboth
hosesare connected.
Turn hydrauliccircuitcontrolvalve
ON.
Check eachquick disconnect
separately. Replaceasnecessary.
Setreliefvalveat2100psi/145bar.
Locateandremoverestriction.
Usecorrectfluid.
Fluidnotwarmed-up.Preheat
system.
Hoses toolongforhoseI.D.Use
shorter hose.
Hoses I.D.toosmallforhose
length.Uselarger I.D. hose.
Check circuit flow rate.
Check circuit flow rate; add a
proper flow control valveorreduce
the pumpRPM.
Correct hose connections. Pressure
should be to thehandle port away
fromthetrigger,return is near the
trigger;thenreplace themain shaft
oil seal.
Replace seal;check seal contact
surfaces.
15
Solution
continued