Stanley HD01 User Manual page 16

TROUBLESHOOTING
PROBLEM
Drill operates in only one
direction. Forward or
reverse.
Drill runs too fast. Impact
mechanism or screws
broken.
Trigger operation erratic.
Control difficult.
Fluid leaks at housing seam.
Fluid leaks at reversing
spool.
Fluid leak at air gap between
module.
Fluid gets hot. Power unit
working hard.
16 ► HD01 User Manual
CAUSE
Reverse spool incorrectly installed.
Reverse spool faulty.
Tool hose flow is reversed.
Incorrect hydraulic flow.
Hydraulic flow reversed.
Priority valve faulty.
Trigger mechanism and strut area
blocked by debris.
Motor screws loose.
Motor cap seal worn or missing.
Motor cap/main housing damaged.
Damaged o-rings.
Wrong hydraulic fluid. Circuit too hot.
Hydraulic pressure and return hoses
reversed.
Oil leak at motor shaft seal.
Open center tool on a closed center
circuit or vice versa.
Circuit relief set too low.
Too much fluid going through tool.
Circuit is generating high heat with flow
controls.
Circuit has contaminants that have
caused wear and high heat generation.
SOLUTION
Do not separate modules. Reassemble. See
Service section.
Do not separate modules. Replace reverse
spool. See Service section.
Tool must not be reversed by reversing hose
flow. The tool is only designed for flow as
indicated by the designations cast on the
housing.
Check the hydraulic power source is not
producing over 9 gpm/34 lpm at 750–2000
psi/53–140 bar.
Correct the tool hoses. IN and OUT per
instructions and if the power supply valve is
reversible, reconnect the tool return hose to the
oil cooler or to the filter directly.
Do not separate modules. Remove, inspect and
replace priority valve if necessary. See Service
section.
Do not separate modules. Clean trigger area.
See Service section.
Separate modules. Tighten to recommended
torque.
Separate modules. Replace as required.
Separate modules. Replace as required.
Do not separate modules. Replace them as
required.
See Operation section for correct fluid/circuit
specifications.
Correct hose connections.
Repair or replace. See Service section.
Use tools to match circuit.
Adjust relief valve to 2100–2250 psi/135–155
bar.
Adjust flow for 9 gpm/34 lpm maximum.
Use pump size and rpm for producing needed
flow only. Eliminate circuit heating causes.
Replace worn pump and valves. Install a large
clean filter and keep the fluid clean.