Troubleshooting - Stanley CD12 User Manual

When diagnosing faults in operation of the tool always check that the hydraulic power source is supplying the
correct hydraulic flow and pressure, as listed in the table. Use a flowmeter known to be accurate. Check the flow
with the hydraulic oil temperature at least 80 °F/27 °C.
Problem
Tool will not start
Low drilling torque.
Tool runs too fast.
Fluid leak between motor and
valve housing.
Fluid leaks at control valve.
14 ► CD12 User Manual

TROUBLESHOOTING

Cause
Power not being supplied.
Defective quick-disconnect.
Jammed motor.
Incorrect hydraulic flow.
Defective quick-disconnect.
Hydraulic circuit relief set too low.
Fluid restriction in hose or valve.
Excess back-pressure.
Hoses too restrictive.
Hydraulic fluid is too thick.
Too low slip clutch torque.
Over-feeding the drill.
Incorrect hydraulic flow.
Motor capscrews loose.
Motor O-rings worn.
Motor cap/main housing damaged.
Damaged O-rings.
Wrong hydraulic fluid. Circuit to hot. See Operation section for correct fluid/
Hydraulic pressure and return hosed
reversed.
Solution
Make sure the hoses are connected
and the couplers are tight.
Turn the hydraulic system control
valve ON.
Check each disconnect separately.
Replace as necessary.
See your authorized dealer for
service.
Check that the hydraulic power source
is producing 7-9 GPM/26-34 LPM at
950-2000 psi/66-138 bar.
Check each disconnect separately.
Set relief valve at 2100 psi/145 bar.
Locate and remove obstruction.
Fluid not warmed up. Preheat system.
Hoses too long for hose ID. Use
shorter hose. Use larger ID hose.
Inspect and replace slip clutch
washers if necessary. Set torque to
45 ± 1.5 Nm/ 33 ± 1 ft-lb. See your
authorized service dealer for repair.
Do not overload drill to avoid wear of
slip clutch.
Check that hydraulic power source is
not producing over 8 GPM/30 LPM at
950-2000 psi/66-138 bar.
Tighten to recommended torque (10
Nm = 7.5 ft-lb).
See your authorized dealer for repair.
See your authorized dealer for repair.
See your authorized dealer for repair.
circuit specifications.
Correct hose connections.