LHFS-210003 Pruner
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
7
Maintenance
(cont’d)
Troubleshooting
1. Refer to the figure below. While depressing the
trigger, disconnect the tool from the hydraulic power
source. This will leave the blade (1) in the correct
position (fully-closed) for adjusting proper blade
closure.
2. Remove the two 1/4-28 hex lock nuts (2) and
1/4 x 7/8" hex head cap screws (3) which secure the
cutter and mounting assembly (4) onto the exten-
sion tube (5). Insert one of the cap screws into the
blind hole in the cutter mounting bracket (4) and
tighten until the cutter mounting bracket is loose on
the extension tube (5).
3. Move the entire cutter and mounting assembly (4)
up or down on the extension tube (5) until proper
blade closure is attained (approximately 1/3 of
surface of hook should be covered by the blade).
Remove the cap screw from the cutter mounting
bracket (4).
4. Reinstall and tighten the two 1/4-28 hex lock nuts
(2) and 1/4 x 7/8" hex head cap screws (3) to secure
the cutter mounting bracket (4) to the extension
tube (5).
5. Connect the tool to the hydraulic power source and
actuate the tool several times. Blade action should
be smooth and uniform from the fully-open posi-
tion to the fully-closed position (approximately 1/3
of surface of hook should be covered by the blade).
There should be no excessive play in the cutter unit
linkage.
Repeat the above procedure until the blade closure is
correct.
1
4
5
2,3
Adjusting Blade Closure
Before You Begin
1. Tool must be connected to the correct power source
system. Refer to the Specifications and Parts
manual for the type of hydraulic system required.
Verify the power source hydraulic system.
2. Verify that the pressure and return hoses are
connected properly to the tool and power source
ports.
3. Power source reservoir must be filled to FULL mark
with hydraulic fluid.
4. Start the power source. All power source shut-off
devices must be engaged or opened (clutch-
engaged, separate ON/OFF valves open, etc.).
5. After verifying all of the above, check the tool to see
if it operates.
If the tool does not operate, it will be necessary
to pinpoint the tool, hose, or power source as the
problem area. The following steps will help to deter-
mine the problem area.
Determine the Problem Area
1. Check the power source and pressure if the proper
gauges and tools are available. If these items are
not available, proceed to the next step.
2. Stop the power source.
3. Disconnect the tool from the hoses and power
source.
4. Connect a known working tool to the hoses and
power source. Refer to the tool’s operator’s manual
for correct hookup procedure. Start the power
source.
• If the known working tool operates, the
problem is in the disconnected tool. Refer to the
Troubleshooting charts in this manual.
• If the known working tool does not operate, the
problem is likely to be in the hoses or the power
source. Proceed to next step.
5. Stop the power source.
6. Disconnect the existing hoses from the known
working tool and power source.
7. Connect a different set of hoses to the known
operating tool and power source. Start the power
source.
• If the known working tool operates with the
different set of hoses, the problem is in the
disconnected hoses.
• If the known working tool does not operate,
the problem is in the power source. Refer
to your power source operator’s manual for
troubleshooting.
