BR89 User Manual ◄ 13
TRouBlesHooTing
PROBLEM CAUSE SOLUTION
Tool does not run.
pressure (7–9 gpm/26–34 lpm, 1500–
2000 psi/105–140 bar.
Couplers or hoses blocked. Remove restriction.
reversed at ports.
Be sure hoses are connected to their
proper ports.
Mechanical failure of piston or
automatic valve.
Disassemble breaker and inspect for
damaged parts.
Tool does not hit effectively.
pressure (7–9 gpm/26–34 lpm, 1500–
2000 psi/105–140 bar.
Couplers or hoses blocked. Remove restriction.
Low accumulator charge (pressure
hose will pulse more than normal).
Recharge accumulator. Replace
diaphragm if charge loss continues.
Fluid too hot (above 140 °F/60 °C).
temperature (130 °F/55 °C).
The collar support is not sliding
freely in the foot bore.
Remove, clean and replace as required.
Make sure hex bushing is in the proper
location.
Tool operates slow. Low gpm supply from power unit.
gpm/26–34 lpm).
High back pressure. Check hydraulic system for excessive
back pressure (over 250 psi/17 bar).
Couplers or hoses blocked. Remove restriction.
Remove restriction.
Fluid too hot (above 140 °F/60 °C)
or too cold (below 60 °F/16 °C).
temperature. Bypass cooler to warm the
temperature.
The collar support is not sliding
freely in the foot bore.
Remove, clean and replace as required.
Make 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.
(140 °F/60 °C max). Check the relief
devices.
Fluid leakage on tool bit. Lower piston seal failure. Replace seal.
Fluid leakage through charge
valve cap.
Upper piston seal failure or
accumulator O-ring failure or
accumulator charge loss or failure.
Replace seals, recharge or replace
accumulator diaphragm.
Fluid leakage around trigger. Valve spool seal failure. Replace seals.
