Troubleshooting - Stanley BR37 User Manual

PROBLEM
Tool does not run.
Tool does not hit effectively.
Tool operates slow.
Tool gets hot.
Fluid leakage on tool bit.
Fluid leakage around trigger.
CAUSE
Power unit not functioning.
Couplers or hoses blocked.
Pressure and return line hoses
reversed at ports.
Mechanical failure of piston or
automatic valve.
Power unit not functioning.
Couplers or hoses blocked.
Low accumulator charge
(pressure hose will pulse more
than normal).
Fluid too hot (above
140 °F/60 °C).
Low gpm supply from power
unit.
High backpressure.
Couplers or hoses blocked.
Orifice plug blocked.
Fluid too hot (above
140 °F/60 °C) or too cold
(below 60 °F/16 °C).
Relief valve set too low.
Hot fluid going through tool.
Lower piston seal failure.
Valve spool seal failure.

TROUBLESHOOTING

REMEDY
Check power unit for proper flow and pressure
(7–9 gpm/26–34 lpm, 1500–2000 psi/
105–140 bar).
Remove restriction.
Be sure hoses are connected to their proper
ports.
Disassemble breaker and inspect for
damaged parts.
Check power unit for proper flow and pressure
(7–9 gpm/26–34 lpm, 1500–2000 psi/
105–140 bar).
Remove restriction.
Recharge accumulator. Replace diaphragm if
charge loss continues.
Provide cooler to maintain proper fluid
temperature (140 °F/60 °C).
Check power unit for proper flow (7–9
gpm/26–34 lpm).
Check hydraulic system for excessive
backpressure (over 200 psi/14 bar).
Remove restriction.
Remove restriction.
Check power unit for proper fluid temperature.
Bypass cooler to warm the fluid 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 fluid to go through the
relief valve. Provide cooler to maintain proper
fluid temperature (140 °F/60 °C max).
Check the relief valve setting.
Eliminate flow control devices.
Replace seal.
Replace seals.
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