Troubleshooting - Stanley HD08 User Manual

TROUBLESHOOTING

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.
When diagnosing faults in operation of the hammer drill, always check that the hydraulic power source is supplying the cor-
rect hydraulic flow and a pressure to the tool as listed in the table. Use a flowmeter known to be accurate. Check the flow
with the hydraulic fluid temperature at least 80 °F/27 °C.
ProBlem
Drill will not start
Low hammer impact or
drilling torque.
14 ► HD08 user manual
cauSe
Power not being supplied.
Defective quick-disconnect.
Jammed motor and/or parts.
Flow reversed through hoses.
Incorrect hydraulic flow.
Defective quick-disconnect.
Worn impact mechanism.
Incorrect grease.
Reversing spool incorrectly installed.
Hydraulic circuit relief set too low,
hoses too restrictive or the hydraulic
fluid is too thick.
Fluid restriction in hose or valve.
Excess back pressure.
Priority flow control valve or reverse
check valve is malfunctioning.
Flow reversed through hoses.
SolutioN
Check to make certain that both hoses are
connected.
Turn hydraulic circuit control valve ON.
Check each disconnect separately. Replace as
necessary.
Separate modules and inspect. See Service
manual. Do not force parts together.
Correct the power source control valve position.
Prevent reverse flow by using only one port
from the valve for pressure, the return tool
hose to the cooler and the filter line. Correct
the quick-disconnect male/female routing per
instructions and arrows on the fittings.
Check that the hydraulic power source is
producing 4–9 gpm/15–34 lpm at 750–2000
psi/53–140 bar.
Check each disconnect separately.
Separate modules and repair or replace impact
mechanism. See Service section.
Metabo (forward module) mechanism is
full of fluid or contaminants or is improperly
greased. "Clean out, re-lubricate, and/or repair
per Metabo instructions. See instructions for
separating the rear module to supply Metabo
portion to the dealer for service".
Reversing spool upside down. Do not separate
modules. See Service section.
Set relief valve at 2100 psi/145 bar. See
Service section.
Locate and remove restriction.
Use correct fluid.
Fluid not warmed-up. Preheat system.
Hoses too long for hose ID. Use shorter hose.
Do not separate modules. See Service manual.
Correct the power source control valve position.
Prevent reverse flow by using only one port
from the valve for pressure, the return tool
hose to the cooler and the filter line. Correct
the quick-disconnect male/female routing per
instructions and the arrows on the fittings.