HPB25 Hydraulic Paving Breaker
Greenlee Tools, Inc.
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
10
Problem
Probable Cause
Probable Remedy
Tool does not operate.
Improper power source.
Verify that the power source meets the
specifications.
Hydraulic fluid level low.
Check the fluid level. Check system for
leaks.
Incorrect hydraulic fluid viscosity.
Use hydraulic fluid with the correct
viscosity.
Tool operates slowly or
erratically.
Hydraulic fluid cold.
Allow fluid to warm to the operating
temperature. Actuate the tool intermit-
tently to reduce the warming time.
Power source not adjusted correctly.
Refer to the power source operator’s
manual. Set the flow and pressure to
correspond with the tool.
Hydraulic fluid level low.
Check the fluid level. Check system for
leaks.
Air in the hydraulic system.
Refer to the power source manufac-
turer’s instructions for removing air from
the system.
Incorrect hydraulic fluid viscosity.
Use hydraulic fluid with the correct
viscosity.
Tool feels hot.
Hydraulic fluid level low.
Check the fluid level. Check for leaks.
Incorrect hydraulic fluid viscosity.
Use hydraulic fluid with the correct
viscosity.
Hydraulic fluid dirty.
Refer to the power source owner’s
manual for procedure to replace
hydraulic oil and filter.
Strike rate is normal;
blow energy is weak.
Low accumulator gas pressure.
Adjust nitrogen pressure in accumulator
to 40 kg/cm
2
(569 psi).
Broken accumulator diaphragm.
Replace diaphragm and recharge to
40 kg/cm
2
(569 psi).
Troubleshooting
Before troubleshooting, determine whether the problem
is in the tool, the hoses, or the power source. Substitute
a tool, hoses, or power source known to be in good
working order to eliminate the item that is not operating.
If the problem is in the tool, see the troubleshoot-
ing table in this manual. If the problem is in the power
source, see the troubleshooting section of the power
source instruction manual.
