Troubleshooting - Stanley BR87 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 through charge
valve cap.
Fluid leakage around trigger.

TROUBLESHOOTING

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).
The collar support is not sliding
freely in the foot bore.
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).
The collar support is not sliding
freely in the foot bore.
Relief valve set too low.
Hot fluid going through tool.
Lower piston seal failure.
Upper piston seal failure or
accumulator O-ring failure or
accumulator charge loss or
failure.
Valve spool seal failure.
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 (130 °F/55 °C).
Remove, clean and replace as required. Make
sure hex bushing is in the proper location.
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.
Remove restriction.
Check power unit for proper fluid temperature.
Bypass cooler to warm the fluid or provide cooler
to maintain proper temperature.
Remove, clean and replace as required. Make
sure hex bushing is in the proper location.
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, recharge or replace accumulator
diaphragm.
Replace seals.
BR87 User Manual ◄ 13