Stanley Black & Decker BR87 user manual Troubleshooting, Problem Cause Remedy

Tool does not run.

Power unit not functioning.

Check power unit for proper flow and pressure

(7–9 gpm/26–34 lpm, 1500-2000 psi/105–140 bar.

Couplers or hoses blocked.

Remove restriction.

Pressure and return line hoses

Be sure hoses are connected to their proper ports.

reversed at ports.

Mechanical failure of piston or

Disassemble breaker and inspect for damaged

automatic valve.

parts.

Tool does not hit effectively.

Power unit not functioning.

Check power unit for proper flow and pressure

(7–9 gpm/26–34 lpm, 1500–2000 psi/105–140

bar.

Couplers or hoses blocked.

Remove restriction.

Low accumulator charge

Recharge accumulator. Replace diaphragm if

(pressure hose will pulse more

charge loss continues.

than normal).

Fluid too hot

Provide cooler to maintain proper fluid

(above 140 °F/60 °C).

temperature (130 °F/55 °C).

The collar support is not sliding

Remove, clean and replace as required. Make

freely in the foot bore.

sure hex bushing is in the proper location.

Tool operates slow.

Low gpm supply from power

Check power unit for proper flow (7–9 gpm/

unit.

26–34 lpm).

High backpressure.

Check hydraulic system for excessive

backpressure (over 250 psi/17 bar).

Couplers or hoses blocked.

Remove restriction.

Orifice plug blocked.

Remove restriction.

Fluid too hot (above

Check power unit for proper fluid temperature.

140 °F/60 °C) or too cold (below

Bypass cooler to warm the fluid or provide cooler

60 °F/16 °C).

to maintain proper temperature.

The collar support is not sliding

Remove, clean and replace as required. Make

freely in the foot bore.

sure hex bushing is in the proper location.

Relief valve set too low.

Adjust relief valve to 2100–2250 psi/145–155 bar.

Tool gets hot.

Hot fluid going through tool.

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.

Fluid leakage on tool bit.

Lower piston seal failure.

Replace seal.

Fluid leakage through charge

Upper piston seal failure or

Replace seals, recharge or replace accumulator

valve cap.

accumulator O-ring failure or

diaphragm.

accumulator charge loss or

failure.

Fluid leakage around trigger.

Valve spool seal failure.

Replace seals.