Troubleshooting - Stanley HD45 User Manual

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 correct 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 does not run.
Does not drill effectively.
Drill operates slow.
Drill gets hot.
Oil leakage on drill bit.
Oil leakage around trigger.
Low rotation torque.

TROUBLESHOOTING

Cause
Power unit not functioning
Couplers or hoses blocked.
Flow direction reversed. Pressure and
return lined hoses reversed at ports.
Mechanical failure of piston or automat-
ic valve.
Power unit not functioning.
Couplers or hoses blocked.
Low accumulator charge (pressure
hose will pulse more than normal).
Oil too hot
(above 140 °F/60 °C).
Low flow supply from power unit.
High backpressure.
Couplers or hoses blocked.
Orifice plug or internal passage blocked. Remove restriction.
Oil too hot (above 140 °F/60 °C) or too
cold (below 60 °F/16 °C).
Relief valve set too low.
Hot oil going through tool.
Lower piston or drive hex seal failure.
Valve spool seal failure.
Motor not completely broken in.
Damage to motor clearances.
Mechanical binding during drilling.
Solution
Check power unit for proper flow and
pressure (7–9 GPM/26–34 LPM, 1500–
2000 psi/104–140 bar).
Remove restriction.
Be sure hoses are connected to their
proper ports.
Disassemble drill and
damaged parts.
Check power unit for proper flow and
pressure (7–9 GPM/26–34 LPM, 1500–
2000 psi/104–140 bar).
Remove restriction.
Recharge accumulator.
diaphragm if charge loss continues.
Provide cooler to maintain proper oil
temperature.
Check power unit for proper flow (7–9
GPM/26–34 LPM).
Check hydraulic system for excessive
backpressure (over 250 psi/17 bar).
Remove restriction.
Check power unit for
temperatures. Bypass cooler to warm oil
up or provide cooler to maintain proper
temperature.
Adjust relief valve to 2100–2250 psi/145–
155 bar.
Check power unit. Be sure flow rate
is not too high causing part of the oil
to go through the relief valve. Provide
cooler to maintain proper oil temperature
(140 °F/60 °C maximum).
Check relief valve setting.
Replace seals.
Replace seals.
Continued operation or break-in with
motor break-in block.
Repair as required.
Take care to guide drill straight.
HD45 User Manual ◄ 17
inspect for
Replace
proper oil