Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
21
HPS513 • HCS816 • HCS820 Chain Saws
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, refer to the troubleshooting table in this manual. If the problem is in the power source,
refer to the troubleshooting section of the power source instruction manual.
Problem
Probable Cause
Probable Remedy
Tool does not operate.
Improper power source.
Verify that the power source meets
the specifications. Refer to the
“Specifications” section.
Hydraulic fluid level low.
Check the fluid level. Check system
for leaks.
Incorrect hydraulic fluid viscosity.
Use hydraulic fluid with the
correct viscosity. Refer to the
“Specifications” section.
Tool operates slowly or erratically.
Hydraulic fluid cold.
Allow fluid to warm to the operat-
ing temperature. Actuate the tool
intermittently 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 power source manufac-
turer’s instructions for removing air
from the system.
Incorrect hydraulic fluid viscosity.
Use hydraulic fluid with the
correct viscosity. Refer to the
“Specifications” section.
Trigger difficult to operate;
trigger sticks when released.
Dirt or gummy deposits on trigger
or spool.
Clean and lubricate trigger and
trigger spool.
Chain runs in wrong direction.
Hose connections at tool are
reversed.
Depressurize hydraulic system.
Switch the hose connections.
