Greenlee LHFS-210001, LHFS-210002, LHFS-210003, LHFS-210005 Operation, Service And Parts Instruction Manual
OPERATION, SERVICE AND PARTS
INSTRUCTION MANUAL
Limb Lopper™
by
GREENLEE
FAIRMONT
ORCHARD AND SHADE TREE PRUNER
(Closed Center Conversion Part Included)
LHFS-210001, LHFS-210002,
LHFS-210003 & LHFS-210005
999 1459.0 REV 3 © 1999 Greenlee Textron 3/99
Read and understand this material before
operating or servicing this pruner . Failure
to understand how to safely operate this
pruner could result in an accident causing
serious injury or death.
Table of Contents
OPERATION
Safety Information ....................................................................................3-4
Description ..................................................................................................5
Identification ................................................................................................5
Specifications - Tool ....................................................................................6
Hoses and Fittings.......................................................................................8
Tool/Hose Connections ...............................................................................8
Operation.....................................................................................................9
SERVICE
Maintenance Schedule..............................................................................10
Lubrication.................................................................................................10
Blade and Hook Maintenance ..............................................................11-12
Troubleshooting....................................................................................13-16
Disassembly .........................................................................................17-18
Inspection ..................................................................................................18
Assembly..............................................................................................19-20
PARTS - Pruner, LHFS-21001; LHFS-21002; LHFS-21003; LHFS-21005
Exploded View...........................................................................................22
Parts List ..............................................................................................23-24
Closed Center Conversion for LHFS Pruners ...........................................25
APPENDICES
Appendix A - SAE J1273 May 1986 .....................................................26-27
Orchard and Shade Tree Pruner
- Hydraulic Power Source .................................................6-7
- Recommended Hydraulic Fluids........................................ 7
Additional or replacement manuals may be obtained from your Greenlee Fairmont distributor. When tool is received,
complete the following record:
SERIAL NUMBER: ____________________________
DATE OF PURCHASE:_________________________
WHERE PURCHASED: ________________________
Always mention the tool’s serial number when ordering or writing about parts.
For convenience in ordering, parts are listed by part number, description and quantity. If in doubt as to part needed,
send a full description, sketch, or the part itself with the order. Prior arrangements must be made before returning a
tool for warranty service.
To insure correct and prompt shipment of parts, always provide the following information when ordering:
1. Quantity of each part wanted 4. Serial Number of tool
2. Part number of item 5. Preferred method of shipment: by mail, UPS, or air freight
3. Description of part
Greenlee Textron / Subsidiary of Textron Inc.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
IMPORTANT SAFETY INSTRUCTIONS
SAFETY
ALERT
Immediate hazards which, if not avoided, WILL result in
severe personal injury or death.
SYMBOL
The symbol above is used to call your attention
to instructions concerning your personal safety.
Watch for this symbol. It points out important safety
precautions. It means “ATTENTION! Become alert!
Your personal safety is involved!” Read the
message that follows and be alert to the possibility
of personal injury or death.
Safety is a critical factor in the design of Greenlee equipment. The best program starts with a safety-conscious
operator. The information highlighted in this bulletin describes operating practices for the benefit of the workers
who will use our equipment in their daily jobs. Comments from users are appreciated.
A person who has not read and does not understand all
operating instructions is not qualified to operate this tool.
Hazards or unsafe practices which, if not avoided, COULD
result in severe personal injury or death.
Hazards or unsafe practices which, if not avoided, COULD
result in minor personal injury or property damage.
Failure to read and understand safety instructions may
result in injury or death.
Additional copies of this manual are available upon request at no charge.
SAVE THESE INSTRUCTIONS
Greenlee Textron / Subsidiary of Textron Inc.
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Safety Information
Orchard and Shade Tree Pruner
Electrical Shock Hazard:
This is not an insulated tool.
Do not use near electrical lines.
Contact with live circuits can result
in severe injury or death.
Skin Injection Hazard:
High pressure oil easily punctures
skin causing serious injury, gangrene
or death. If injured seek medical help
immediately to remove oil.
Do not use fingers or hands to check
for leaks.
Depressurize hydraulic system
before servicing.
Keep hands and fingers away from
closing blades.
• Do not disconnect tool, hoses or fittings while the
power unit is running or if the hydraulic fluid is
hot. Exposure to hot hydraulic fluid can cause
serious burns.
• Do not reverse hydraulic flow. Operation with
hydraulic flow reversed can cause tool malfunction. Always connect supply (pressure) hoses
and return (tank) hose to proper tools ports.
Failure to observe these warnings could result in
severe injury or death.
• Use this tool for the manufacturer’s intended
purpose only. Use other than that which is
described in this manual can result in injury or
property damage.
• Inspect hydraulic hoses and couplings every
operating day. Repair or replace if leakage,
cracking, wear, or damage is evident.
Damaged hoses or couplings can fail resulting
in injury or property damage.
• Make sure all bystanders are clear of the work
area when handling, starting and operating the
tool. Nearby personnel can be injured by flying
or falling debris or by flying parts in the event
of a tool malfunction.
• Inspect the cutter blade every operating day.
Remove and destroy cutter blade if cracks, chips,
or gouges are evident. A damaged blade can
break and strike nearby personnel.
• Do not change accessories, inspect, adjust or
clean tool when it is connected to a power source.
Accidental start-up can result in serious injury.
• Maintain a firm grip on tool, using both hands at
all times. Serious injury can result if the operator
does not control the tool.
Failure to observe these warnings could result in
severe injury or death.
Wear eye protection when using this
tool. Failure to wear eye protection
can result in serious eye injury from
flying debris or hydraulic fluid.
Greenlee Textron / Subsidiary of Textron Inc.
IMPORTANT
Procedure for disconnecting tool, removing
hydraulic lines, fittings or components:
1. Stop the power source.
2. Depressurize the hydraulic system.
3. Disconnect hydraulic hoses from tool.
Remove lines, fittings or components slowly
to release any trapped pressure.
Note: Keep all decals clean and legible. Replace decals
when necessary with new decals listed in the
Parts section of this manual.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Description
Orchard and Shade Tree Pruner
The Orchard/Shade Tree Pruner provides quiet, positive
power for many tree pruning applications. The longreach, hydraulic-actuated tree pruner is designed to
prune branches in orchards and general trimming of
shade trees.
Electrical Shock Hazard:
This is not an insulated tool.
Do not use near electrical lines.
Contact with live circuits can result
in severe injury or death.
Identification
Figure 1
Parts of the Orchard/Shade Tree Pruner
1. Return Port (OUT) 5. Cutter Hook
2. Pressure Port (IN) 6. Trigger
3. Extension Tube 7. Cutter Blade
4. Handle 8. Trigger Guard
The handle is heat-insulated and has a full-hand trigger
guard for the operator’s comfort and safety. The LHFS
is available in four different models, with lengths ranging
from 42 inches to 78 inches for various tree trimming
requirements. The cutter unit, made of forged alloy steel
for long cutting edge life, can trim branches up to 1-3/4
inches in diameter.
7
5
3
Greenlee Textron / Subsidiary of Textron Inc.
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8
4
2
5
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Specifications - Tool
Length - LHFS-210001.................................................................................. 42 in.
- LHFS-210002.................................................................................. 48 in.
- LHFS-210003.................................................................................. 60 in.
- LHFS-210005.................................................................................. 78 in.
Weight - LHFS-210001............................................................................... 6.9 lbs.
- LHFS-210002............................................................................... 7.1 lbs.
- LHFS-210003............................................................................... 7.7 lbs.
- LHFS-210005............................................................................... 7.9 lbs.
Width ................................................................................................................ 6 in.
Cutting Capacity.........................................................................................1-3/4 in.
Type of Hydraulic System .................................................................. Open Center
Pressure Port .......................................................................................... 3/8 NPTF
Return Tank Port..................................................................................... 3/8 NPTF
Specifications - Hydraulic Power Source
• Power source flow must not exceed 6 gpm (23 lpm).
• Limit relief pressure to 2000 psi (13,790 kPa).
Failure to observe these warnings could result over-pressurizing the system. Severe injury or death may result.
Any hydraulic power source used with this tool must meet the following requirements:
Type of Hydraulic System ..................................................................Open-Center
Flow - Minimum...........................................................................4 gpm (15.1 l/m)
- Recommended.................................................................5 gpm (18.9 l/m)
- Maximum.............................................................................6 gpm (23 l/m)
Operating Pressure - Minimum ............................................1000 psi (6,895 kPa)
- Maximum .........................................2000 psi (13,790 kPa)
Pressure Relief Setting ...................................................... 2000 psi (13,790 kPa)
Filtration ................................................................................ 10 Micron (Nominal)
Back Pressure - *Maximum ...................................................200 psi (1,379 kPa)
* 200 psi (1,379 kPa) is the maximum agreed standard for the Hydraulic Tool Manufacturers Association (HTMA).
Greenlee Fairmont tools will operate satisfactorily at this standard.
1. Maximum fluid temperature must not exceed 140˚F (60˚C) at the maximum expected ambient temperature.
A sufficient oil cooling capacity is needed to limit the fluid temperature.
2. Maximum flow must not exceed 6 gpm. Install a flow meter in the return line to test the rate of flow in the system
before working the tool.
3. Pressure relief valve must not exceed 2000 psi. The pressure relief valve must be located in the supply circuit
between pump and tool to limit excessive hydraulic pressure to the tool.
4. Figure 2 shows a typical power source being used with the tool.
Greenlee Textron / Subsidiary of Textron Inc.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Specifications - Hydraulic Power Source (cont’d)
FILTER
(10 MICRON)
COOLER
FLOW METER
T
P
TOOL
RESERVOIR
PUMP
POWER SOURCE
RELIEF
VALVE
2000 PSI
CONTROL
VALVE
Figure 2
Hydraulic Schematic
Recommended Hydraulic Fluids
Any non-detergent hydraulic fluid which meets the following specifications or HTMA specifications may be used.
S.U.S. @ 100˚F (38˚C)............................................................ 140 to 225
@ 210˚F (99˚C)............................................................ 40 minimum
Flash Point .............................................................................. 340˚F min (170˚C min)
Pour Point ............................................................................... -30˚F min (-34˚C min)
Greenlee Textron / Subsidiary of Textron Inc.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Specifications (cont’d)
Hoses and Fittings
Hoses and fittings used with this tool must comply
with S.A.E. standard J1273 (See Appendix A)
recommended practice for selection, installation
and maintenance of hose and hose assemblies.
Failure observe this warning could result in severe
injury or death.
Hose assemblies and quick connect couplers are
available from Greenlee Fairmont as accessories.
SEE BULLETIN #999.1032.2 ON GREENLEE
FAIRMONT NO-DRIP COUPLERS AND HOSES.
CONTACT AUTHORIZED GREENLEE FAIRMONT
DISTRIBUTOR.
Tool/Hose Connections
Always stop power source before connecting or
disconnecting tool.
Failure to observe this warning could result in
severe injury or death.
Connecting Hoses (see Figures 1 & 2)
1. Stop the power source.
2. Connect the return (tank) hose from the power
source (port T) to the tool (T port).
Note: Return (tank) hose connection should always
be connected before supply (pressure) hose
connection to prevent pressure build-up inside
the tool.
3. Connect the supply (pressure) hose from the power
source (port P) to the tool (P port).
Disconnecting Hoses (see Figures 1 & 2)
1. Stop the power source.
2 Disconnect the supply (pressure) hose from the
power source (port P) to the tool (P port).
Note: Supply (pressure) hose connection should
always be disconnected before return (tank)
hose connection to prevent pressure build-up
inside the tool.
3. Disconnect the return (tank) hose from the power
source (port T) to the tool (T port).
4. To prevent contamination, always install dust caps
over the hydraulic ports of the pruner when disconnected.
Greenlee Textron / Subsidiary of Textron Inc.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Operation
Electrical Shock Hazard:
This is not an insulated tool.
Do not use near electrical lines.
Contact with live circuits can result
in severe injury or death.
• Inspect the cutter blade every operating day.
Remove and destroy cutter blade if cracks,
chips, or gouges are evident. A damaged blade
can break and strike nearby personnel.
• Do not change accessories, inspect, adjust or
clean tool when it is connected to a power
source. Accidental start-up can result in serious
injury.
• Maintain a firm grip on tool, using both hands at
all times. Serious injury can result if the operator
does not control the tool.
Orchard and Shade Tree Pruner
Pre-Operation (see Figure 1)
1. Stop the power source.
2. Inspect the cutter blade. A build-up of metal (wire
edge) will form on new blades as it seats across the
face of the hook. This build-up of metal (wire edge)
must be removed several times, until the blade
seats itself to the hook. See Service Section Dressing the Cutter Blade and Hook. Failure to
remove the wire edge will cause the edge of the
blade to roll over, chip, and/or crack.
Several times a day the blade and hook must be
dressed with a pocket whetstone. This keeps the
cutting edges sharp and prevents them from rolling
and chipping. See Service Section - Dressing the
Cutter Blade and Hook (page 11).
3. Connect the hydraulic hoses from the power source
to the tool. See Tool/Hose Connections.
4. It is recommended that the power source be allowed to run (idle) for a few minutes to warm the
hydraulic reservoir fluid. Actuating the tool intermittently will reduce the time required to warm the fluid
to an efficient operating temperature.
Failure to observe these warnings could result in
severe injury or death.
Keep hands and fingers away from
closing blades.
• Use this tool for the manufacturer’s intended
purpose only. Use other than that which is
described in this manual can result in injury or
property damage.
• Inspect hydraulic hoses and couplings every
operating day. Repair or replace if leakage,
cracking, wear, or damage is evident.
Damaged hoses or couplings can fail resulting
in injury or property damage.
• Make sure all bystanders are clear of the work
area when handling, starting and operating the
tool. Nearby personnel can be injured by flying
or falling debris or by flying parts in the event
of a tool malfunction.
Operation (see Figure 1)
1. Grasp the extension tube (3) with one hand and
trigger handle (4) with your opposite hand.
2. Position the inner curve of the pruner cutter hook (5)
against the limb to be cut.
3. To actuate the pruner, depress (squeeze) the trigger
(6). The cutter blade (7) will slice through the limb
and come to a stop.
4. To return the cutter blade (7) to the starting position,
release the trigger (6).
5. Lay the tool on a flat surface when not in use.
6. When the tool is not in use, stop the power source to
reduce heat and wear on the tool components.
Greenlee Textron / Subsidiary of Textron Inc.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Service
Orchard and Shade Tree Pruner
Maintenance Schedule
The service life of the tool will be maximized by proper
care and maintenance. The maintenance schedule that
follows is recommended.
• Do not change accessories, inspect, adjust or
clean tool when it is connected to a power
source. Accidental start-up can result in serious
injury.
• Inspect the cutter blade every operating day.
Remove and destroy cutter blade if cracks,
chips, or gouges are evident. A damaged blade
can break and strike nearby personnel.
Inspect hydraulic hoses and couplings every
operating day. Repair or replace if leakage,
cracking, wear, or damage is evident. Damaged
hoses or couplings can fail resulting in injury or
property damage.
Orchard/Tree Trimming Pruner
Daily:
1. Wipe all tool surfaces clean.
2. Inspect the cutter unit. Check for wear at the
pivoting and sliding surfaces. Repair the blade with
a very fine file and a pocket whetstone. Remove
and destroy any cutter blade with severe cracks,
chips or gouges.
3. Lubricate the pivoting and sliding surfaces several
times every operating day with 20W or 30W oil.
Apply a heavy coating to these surfaces before
storing.
4. Several times a day the blade and hook must be
dressed with a pocket whetstone. This keeps the
cutting edge from rolling and chipping.
5. Make sure the extension tube connector nut and
the cutter mounting bracket bolts are tightened
securely.
6. Inspect hydraulic system hoses and fittings for signs
of leaks, cracks, wear, or damage.
7. To prevent contamination, always install dust caps
over couplers when tool is disconnected.
Monthly:
Perform a detailed inspection of the hydraulic system
hoses and fittings as stated in Appendix A - S.A.E.
Standard J1273, May 1986. Replace the hose and/or
fittings if necessary.
Lubrication (see Figure 3)
Lubricate the indicated pivoting and sliding surfaces
several times every operating day with 20W or 30W oil.
Apply a heavy coating to these surfaces before storing.
oil
Greenlee Textron / Subsidiary of Textron Inc.
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Figure 3
Lubrication
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Service (cont’d)
Orchard and Shade Tree Pruner
Blade and Hook Maintenance
Do not change accessories, inspect, adjust or
clean tool when it is connected to a power source.
Accidental start-up can result in serious injury.
Dressing the Cutter Blade and Hook
A build-up of metal, referred to as a “wire edge,” will
form on the edge of a new blade as it seats across the
face of the hook. This wire edge must be removed
several times, until the blade seats itself to the hook.
Rough and dull edges may form on the cutter blade and
the cutter hook from normal usage. Both components
must be dressed with a pocket whetstone several times
each operating day. This keeps the cutting edges sharp
and prevents them from rolling and chipping.
1. Stop the power source.
2. Use the provided pocket whetstone (L046108) to
remove the wire edge by rubbing the whetstone
back and forth on the blade and hook until the
surface irregularities are smooth and the blade
edge is sharp.
Sharpening the Cutter Blade
When a blade has acquired deep nicks and gouges or
has become too dull to be sharpened with a whetstone,
it will be necessary to remove the cutter blade and
sharpen it with a fine metal-cutting file.
1. Disconnect the tool from the power source.
2. Remove the cutter blade from the tool. See Disassembly - Cutter Head.
3. Sharpen the blade with a fine metal-cutting file.
Note: When sharpening with a file, it is important to
maintain the original shape and contour of the
blade. An equal amount of material must be
removed from all parts of the blade. DO NOT
sharpen the blade to a thin, razor edge. This
reduces the strength and shortens the service
life of the blade. Do not over-use the file. It is not
advisable to remove large amounts of metal from
the blade.
should have a beveled cutting edge. This can be
achieved with the whetstone also. Failure to do this
can ruin a new or sharpened blade.
Tension Adjustment (see Figure 4)
The tension adjustment should be checked after about
one hour of use on a new cutter. A wearing-in process
takes place during this time and the cutter pivot nut may
need tightening.
The cutter hook and cutter blade must fit together
snugly. If they are too tight, the cutter will not perform
properly. If the fit is too loose, the tool will not cut
cleanly, and damage to the tool may occur.
1. Disconnect the tool from the power source.
2. See Figure 4. Disconnect the cutter blade (1) from
the linkage that secures it to the extension rod end.
3. Remove the #10 x 1/4 inch socket head cap screw
(2), #10 lock washer (3) and the lock (4).
4. Tighten or loosen the 3/8 - 24 cutter pivot nut (5)
until some drag is felt when the blade (1) is opened
or closed.
5. Install the lock (4) over the 3/8 - 24 cutter pivot nut
(5). Secure the lock (4) with the #10 x /14 inch
socket head cap screw (2) and the #10 lock
washer (3).
Note: If the slot in the lock (4) does not align with the
threaded hole in the cutter hook (6), turn the lock
(4) over. This will allow the lock to be positioned
so that the slot will line up with the threaded hole
in the cutter hook, allowing the #10 x 1/4 inch
socket head cap screw (2) to secure it in place.
6. Reconnect the linkage to the cutter blade (1) and
extension rod end.
1
5
4
2,3
6
4. After the contoured side of the blade has been
sharpened, turn it over so that the flat side is facing
up. Dress the blade with a whetstone just enough to
smooth away any nicks and irregular sharp edges
that may have formed during sharpening of the
contoured side of the blade.
5. Remove any nicks or rough edges on the hook with
a pocket whetstone. The inner curve of the hook
Greenlee Textron / Subsidiary of Textron Inc.
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Figure 4
Tension Adjustment
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Service (cont’d)
Closure Adjustment
Do not change accessories, inspect adjust or
clean tool when it is connected to a power source.
Accidental start-up can result in serious injury.
Proper closing adjustment of the cutter is set at the
factory, and should not be re-set until repeated sharpening of the blade or installation of a new blade requires it.
When closed, the blade should cover about 1/3 of the
surface of the cutter hook.
If the blade is improperly adjusted, the blade closure
must be re-adjusted while the blade is in the fully closed
mode.
1. See Figure 5. While depressing the trigger, disconnect the tool from the hydraulic power source. This
will leave the blade (1) in the correct position (fullyclosed) 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 extension 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 position
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
Figure 5
Adjusting Blade Closure
2,3
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Troubleshooting
Orchard and Shade Tree Pruner
Before You Begin
1. Tool must be connected to the correct power source
system. See Tool Specifications (page 6) 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 level
with hydraulic fluid.
4. Start the power source. All power source shut-off
devices must be engaged or opened (clutchengaged, 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
determine the problem area.
Determine the Problem Area
1. Check the power source flow 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. See the tool’s operator’s manual for
correct hook-up procedure. Start the power source.
If the known working tool operates, the problem is
in the disconnected tool. See the Troubleshooting
charts in this operator’s 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. See your power
source operator’s manual for troubleshooting.
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4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Troubleshooting (cont’d)
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
Tool inoperative. Tool connected to improper power See Tool Specifications for type of
source hydraulic system. hydraulic system required. Verify
power source hydraulic system.
No hydraulic fluid in system or fluid Check fluid level. Fill to FULL mark.
level low. Check system for leaks.
Incorrect fluid viscosity. Use fluid viscosity recommended.
See Recommended Hydraulic Fluids.
Tool components loose. Tighten component hardware.
Dirt, contaminants, etc., in tool Disassemble tool and clean
components. components.
Tool components worn or damaged. Disassemble tool. Replace worn or
damaged components.
Tool operates erratically. Hydraulic fluid cold. Viscosity of oil may be too high at
start of tool operation. Allow oil to
warm to operating temperature.
Actuating tool intermittently will
reduce time required to warm oil to
an efficient operating temperature.
Air in hydraulic system. Check pump suction line for damage
or loose clamps. Tighten clamps or
replace components if necessary.
Fill reservoir.
Tool components sticking or binding. Check for dirt or gummy deposits.
Clean components. Check for worn
or damaged components. Replace
components.
Dirt, contaminants, etc., in tool Disassemble tool. Clean components.
components.
Tool operates slowly. Power source components not Refer to power source operator’s
adjusted correctly. manual for recommended speed,
flow and pressure settings.
Hydraulic fluid cold. Viscosity of oil may be too high at
Greenlee Textron / Subsidiary of Textron Inc.
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start of tool operation. Allow oil to
warm to operating temperature.
Actuating tool intermittently will
reduce time required to warm oil to
an efficient operating temperature.
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Troubleshooting (cont’d)
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
Tool operates slowly. (cont’d) Hydraulic fluid level low. Check fluid level. Fill to FULL mark.
Check system for leaks.
Hydraulic fluid viscosity too heavy. Use fluid viscosity recommended.
See Recommended Hydraulic Fluids.
Tool components loose. Tighten component hardware.
Dirt, contaminants, etc., in tool Disassemble tool. Clean components.
components.
Tool components worn or damaged. Disassemble tool. Replace worn or
damaged components.
Tool leaks hydraulic fluid. Tool components loose. Tighten component hardware.
Tool components worn or damaged. Disassemble tool. Replace worn or
damaged components.
Tool feels hot. Hydraulic fluid level low. Check fluid level. Fill to FULL mark.
Check system for leaks.
Hydraulic fluid viscosity exceeds Use fluid viscosity recommended.
specifications. See Recommended Hydraulic Fluids.
Hydraulic fluid dirty. Drain reservoir, flush and fill with clean
fluid. Change filter.
Tool control valve stuck in partial Free spool so it returns to neutral
power-ON position. position.
Power source components not Refer to power source operator’s
adjusted correctly. manual for recommended speed,
flow and pressure settings.
Dirt, contaminants, etc., in tool Disassemble tool. Clean components.
components.
Worn or damaged O-rings or gaskets. Replace worn or damaged O-rings
or gaskets.
Greenlee Textron / Subsidiary of Textron Inc.
Tool components worn or damaged. Disassemble tool. Replace worn or
damaged components.
15
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Troubleshooting (cont’d)
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
Tool control valve sticks or Check for dirt or gummy deposits. Clean components.
works hard.
Misalignment or binding of control Correct alignment. Lubricate linkage
linkage. joints. Replace damaged components.
Valve components worn or damaged. Disassemble valve and replace worn
or damaged components.
Tool operates backwards. Hydraulic flow reversed to tool. Reverse flow to tool. Check for valve
in system that has reversed flow.
Check hoses for proper flow.
Hydraulic pressure and return lines Disconnect hoses. Reverse couplers.
connected to opposite tool ports. Reconnect hoses to proper tool ports.
Tool components assembled Disassemble tool. Reassemble
incorrectly. correctly.
Tool operates, but blade does Cutter blade loose. Tighten cutter blade nut and bolt
not cut. securely. See Blade and Hook
Maintenance - Tension Adjustment.
Cutter blade not closing properly. Re-adjust blade closure. See Blade
and Hook Maintenance - Closure
Adjustment.
Cutter blade dull. Remove blade and sharpen, or install
a sharp, new blade.
Extension assembly loose. Loose extension connector nut. Tighten extension connector nut.
Greenlee Textron / Subsidiary of Textron Inc.
16
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Disassembly
Orchard and Shade Tree Pruner
COMPLETE DISASSEMBLY OF TOOL IS NOT
RECOMMENDED. RETURN TOOL TO YOUR
NEAREST AUTHORIZED GREENLEE FAIRMONT
DISTRIBUTOR OR TO THE FACTORY.
Skin Injection Hazard:
High pressure oil easily punctures
skin causing serious injury, gangrene
or death. If injured seek medical help
immediately to remove oil.
Do not use fingers or hands to check
for leaks.
Depressurize hydraulic system
before servicing.
Do not disconnect tool, hoses or fittings while the
power unit is running or if the hydraulic fluid is hot.
Exposure to hot hydraulic fluid can cause serious
burns.
IMPORTANT
Procedure for disconnecting tool, removing
hydraulic lines, fittings or components:
1. Stop the power source.
2. Depressurize the hydraulic system.
3. Disconnect hydraulic hoses from tool. Remove
lines, fittings or components slowly to release
any trapped pressure.
The disassembly procedure is divided into sections of
the tool. Complete disassembly of tool is seldom necessary. Disassemble only the area(s) necessary to correct
problem. See Parts illustrations for identification of parts
as they are removed.
Disassembly should be done on a flat, clean surface.
Some parts may fall free during disassembly. To prevent
part loss or damage, keep the tool as close to working
surface as possible.
Inspect all parts as they are disassembled and mating
parts in tool that are not removed for signs of damage,
wear, cracks, etc. Replace any parts which appear to be
damaged.
When removing O-rings which must slide over sharp
surfaces, be careful not to damage the O-rings. Use a
rolling motion, and apply hydraulic fluid to ease removal
of O-rings if necessary.
Cutter Head
1. Remove the #10 - 32 x 5/18 inch hex head machine
screw (23), #10 lockwasher (24), both link arms (25
& 28), two lock pins (27) and the spacer (26).
2. Remove the two 1/4 - 28 x 7/8 inch hex head cap
screws (17) and 1/4 - 28 hex lock nuts (19) which
secure the cutter and mounting assembly (18) onto
the extension tube (10).
3. Insert one of the 1/4 - 28 x 7/8 inch hex head cap
screws (17) into the blind threaded hole on the
blade side of cutter mounting bracket (18). Tighten
bolt until cutter mounting bracket is loose on the
extension tube (10).
4. Remove the cutter and mounting assembly from the
extension tube (10).
5. Remove the #10 - 32 x 1/4 inch socket head cap
screw (32). The #10 lock washer (24) and the
lock (31).
6. Remove the 3/8 - 24 hex nut (33) and cutter bolt
(22). Remove the cutter blade (29) and thin brass
washer (67).
7. Remove the two 1/4 - 28 x 7/8 inch hex head cap
screws (17) and 1/4 inch lock washers (20) which
secure the cutter brace (21) and cutter hook (30) to
the cutter mounting bracket (18). Remove the cutter
brace (21) and cutter hook (30).
Outer Extension Tube and Inner Extension Rod
1. Loosen the extension connector nut (15) and slide
it away from the actuator assembly. Remove the
outer extension tube (10) by sliding it over the inner
extension rod and extension rod end (6 & 7).
2. If necessary, remove the lower collet ring (8), clamp
ring (9), clamp collet (12), upper collet ring (13),
extension connector nut (15) and hand grip (11)
from the outer extension (10).
3. Remove the inner extension rod (6) from the shaft
of the piston (2) using two 1/2 inch open-end
wrenches on the wrench flats milled in the swivel
piston shaft.
4. If necessary, remove the extension rod end (7) from
the inner extension rod (6).
Greenlee Textron / Subsidiary of Textron Inc.
17
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Disassembly (cont’d)
Orchard and Shade Tree Pruner
Ram & Piston Actuator
1. Remove jam nut (14) from upper end actuator (59).
2. Use a strap wrench to unscrew cylinder (53) from
upper end (59). The piston and rod assembly (63)
will remain in cylinder (53) when unscrewing and
removing from upper end (59).
3. Remove rod seal (54), seal (47), bushing (57),
piston seal (55) and seal retainer (56) from upper
end (59).
4. Remove piston and rod assembly (63) with seals
(52, 50, 51, 60 & 61) from cylinder (53).
5. Remove the seals (60 & 61) from piston and rod
assembly (63).
6. Remove the 3/4 inch internal retaining ring (52) from
inside of piston and rod assembly (63). Remove
seal retainer (50) and bypass seal (51).
7. Remove O-ring (47) from handle (75). Remove 3/4
inch internal retaining ring (52) which secures return
tube assembly (49) into the handle (75). Remove
return tube assembly. Remove O-ring (48) from
return tube assembly (49).
8. Remove the #10 x 1/4-inch round slotted head
screws (66) and internal tooth lock washers (65).
Remove trigger guard (64).
9. Remove the 5/32 inch external retaining rings (36)
and slide trigger pivot pin (35) out of handle (75).
Remove trigger (34).
10. Remove valve cap (43) from valve handle (75)
opposite trigger side. Also remove spring (42).
Remove valve stem guide (37); valve stem (38) and
spool (40) from trigger side. Remove O-ring (39)
from spool (40). Also remove O-ring (41) from valve
handle (75).
Inspection
1. Cutter Blade (29): Cutting surface must be smooth
and free of grooves, nicks, or gouges. If blade has
minor grooves, nicks, or gouges, remove them and
sharpen blade with a file or the pocket whetstone
provided with tool. If blade has severe damage,
replace the blade. Both holes in blade are pivot
holes. If either hole is out-of-round, replace blade.
2. Cutter Hook (30): The surface of the cutter hook
which mates with the cutter blade (29) must be
smooth and free of nicks or gouges. If hook has
minor blemishes, remove them with a file. The inner
radius of hook’s cutting surface must be beveled
slightly with a pocket whetstone provided with tool.
3. Valve spool (40): All surfaces must be smooth and
free of grooves, nicks, or scratches. If it has grooves,
nicks, or scratches, replace the spool.
4. Piston and Rod Assembly (63): All surfaces must
be smooth and free of grooves, nicks, or scratches.
If either component has grooves, nicks, or scratches,
replace the component.
5. Cylinder (53): All inner surfaces must be smooth
and free of grooves, nicks, or scratches. If either
component has severe grooves, nicks, or scratches,
replace the component.
6. Inner Extension Assembly (6): All components must
be straight and free of damage. Replace if bent or
damaged.
7. O-Rings and Seals: Always replace O-rings and
seals in components that have been disassembled
with new O-rings and seals during assembly. A
packing kit is available that includes all O-rings and
seals.
Greenlee Textron / Subsidiary of Textron Inc.
18
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Assembly
Orchard and Shade Tree Pruner
When assembling parts, refer to Parts illustrations for
correct orientation and placement of parts.
Clean all parts with solvent (take care to protect eyes),
then dry thoroughly. Do not expose O-rings or other
packing components to solvent for long periods of time.
Inspect all parts as they are assembled for signs of
damage, wear, cracks, etc. Do not install any parts
which appear to be damaged.
Apply hydraulic fluid or O-ring lubricant to all O-rings and
all metal surfaces which O-rings must slide over. When
installing an O-ring over a sharp edge, use a rolling
action to avoid damage to O-ring.
Wherever assembled parts cause metal-to-metal
contact, coat the surfaces with hydraulic fluid or O-ring
lubricant.
Handle and Valve
1. Install O-ring (41), spool (40), spring (42), cap (43),
to upper end of insulated valve body handle (75).
2. Install O-ring (39), stem (38) and stem retainer (37)
on lower end of valve body handle (75).
3. Position trigger (34) on valve handle (75), aligning
holes in each component. Install trigger pivot pin
(35) and secure in place with two 5/32 external
retaining rings (36).
4. Position trigger guard (64) on handle (75) and
secure with 1/4-inch round slotted head cap screws
(66) and internal tooth lock washers (65).
5. Install O-ring (47) onto handle (75).
6. Install O-ring (48) on return tube assembly (49).
Install return tube assembly in handle and secure in
place with 3/4-inch internal retaining ring (52).
7. Install rod seal support (54), bushing (57), O-ring
(55) and seal (56) and O-ring (47) on upper end (59).
8. Clamp upper end (59) in a vise and thread cylinder
(53) onto upper end (59). Tighten with a strap
wrench.
9. Install piston seals (61) and back-up washers (60)
on piston and rod assembly (63).
10. Install bypass seal (51), seal retainer (50) in bottom
end of piston and rod assembly (63) and secure into
place with 3/4" internal retaining ring (52).
11. Slide piston and rod assembly (63) in cylinder and
upper end.
12. Thread handle assembly (75) onto cylinder (53).
Thread nut (14) onto upper end (59).
Outer Extension Tube and Inner Pull Rod
1. Apply Loctite 242-05 (F015774) or equal, onto both
threaded ends of the inner extension rod assembly
(6). Follow the manufacturer’s instruction for curing.
2. Thread the extension rod end (7) onto the inner
extension rod (6). Thread the swivel assembly (1)
onto the lower end of the inner extension rod (6).
Thread the other end of swivel (1) into the shaft of
piston rod (63). Tighten everything securely, using
two 1/2 inch open-end wrenches on the wrench flats
milled in both components.
3. If removed, install the hand grip (11) onto the outer
extension tube (10). The nearest end of the hand
grip (11) must be 5 inches from the end of the outer
extension tube (10).
4. Slide the extension connector nut (16), tapered end
first, onto the outer extension tube (10). Install the
upper collet ring (13), beveled end first, and clamp
collet (12) onto the outer extension tube (10). Install
the clamp ring (9) to secure the components to the
tube. Slip the lower collet ring (8) onto the end of
the outer extension tube (10).
5. Apply a liberal amount of grease (F015437) onto the
extension rod end (7) and inner extension rod (6).
Slide the outer extension tube (10) over the rod and
rod end (6 & 7). Thread the extension connector nut
(15) onto the upper end (59). Tighten securely.
Cutter and Mounting Unit
1. Mount the cutter brace (2) and cutter hook (30) onto
the cutter mounting bracket (18). Loosely thread the
two 1/4 - 28 x 7/8 inch hex head cap screws (17)
and 1/4 inch lock washers (20). The cap screws
(17) must be installed through the brace (21), then
the mounting bracket (18), and finally into the
threaded holes in the hook (30).
2. Install the cutter blade (29) and brass washer (67)
between the brace (2) and hook (30). Align the
holes of all these components and insert the cutter
bolt (22). Thread the 3/8 - 24 hex nut (33) onto the
cutter bolt (22). Tighten the 3/8 - 24 hex nut (33)
until some drag is felt when the blade is opened or
closed. The cutter blade (29) should pivot around
the cutter bolt (22) with slight tension.
Note: The cutter hook (30) and cutter blade (29) must
fit together snugly. If they are too tight, the cutter
will not perform properly. If the fit is too loose, the
tool will not cut cleanly, and damage to the tool
may occur. Wood may jam in-between the hook
and cutter blade, springing them apart and
permanently bending one or the other.
Greenlee Textron / Subsidiary of Textron Inc.
19
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Assembly (cont’d)
3. Install the lock (31) onto the cutter hook (30) and
secure with the #10 x 1/4 inch socket head cap
screw (32) and #10 lock washer (24).
Note: If the slot in the lock (31) does not align with the
threaded hole in the cutter hook (30), turn the
lock over. This will allow the lock to be positioned
so that the slot will line up with the threaded hole
in the cutter hook, allowing the #10 x 1/4 inch
socket head cap screw to secure it in place.
4. Securely tighten the two 1/4 x 7/8 inch hex head
cap screws (17) that secure the brace (21) and
hook (30) to the mounting bracket (18).
5. Slide the cutter and mounting assembly onto the
extension tube (10).
6. Connect the cutter hook (29) and rod end (7)
together with the link arm (25 & 28) and lock pins
(27). Insert the spacer (26) between the two link
arms (25 & 28). Secure the link arms (25 & 28) with
the #10 - 32 x 5/8 inch hex head machine screw
(23) and #10 lock washer (24). Tighten securely.
7. Move the blade (29) and the connecting linkage to
the fully-closed position. When the blade is fully
closed, it should cover about 1/3 of the surface of
the hook (30).
8. When proper closure is attained, install the two
1/4 - 28 x 7/8 inch hex head cap screws (17) and
1/4 - 28 hex lock nuts (19) which secure the cutter
and mounting assembly to the extension tube (10).
Tighten securely.
Greenlee Textron / Subsidiary of Textron Inc.
20
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Greenlee Textron / Subsidiary of Textron Inc.
21
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Orchard and Shade Tree Pruner - Exploded View
29
28
27
26
25
24
23
22
21
20
17
67
30
33
32
24
31
56
55
57
59
47
54
69
17
7
6
19
18
16
15
14
13
12
10
11
53
70
52
49
48
47
75
63
61
60
51
50
52
66
65
1
10
9
8
Greenlee Textron / Subsidiary of Textron Inc.
43
42
36
35
34
37
22
40
39
38
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
41
64
Orchard and Shade Tree Pruner
Orchard and Shade Tree Pruner - Parts List
Key Part No. Description Qty.
1 L060032 Swivel ..........................................................................1
6 L060025 18" Extension Rod.......................................................1
L060026 24" Extension Rod .......................................................1
L060027 36" Extension Rod .......................................................1
L060028 54" Extension Rod .......................................................1
7 L060064 Extension Rod End......................................................1
8 L060021 Lower Collet Ring ........................................................1
9 L089007 Clamp Ring..................................................................1
10 L060015 18" Extension Tube .....................................................1
L060016 24" Extension Tube .....................................................1
L060017 36" Extension Tube .....................................................1
L060018 54" Extension Tube .....................................................1
11 F022985 Rubber Grip .................................................................1
12 L060022 Clamp Collet ................................................................1
13 L060023 Upper Collet Ring ........................................................1
14 L060062 Jam Nut .......................................................................1
15 L060061 Extension Connector Nut ............................................1
16 F017948 Wiper Ring ...................................................................1
17 F023497 Bolt Mounting Bracket .................................................4
18 L060063 Cutter Mounting Bracket..............................................1
19 F011691 Lock Nut.......................................................................2
20 L084005 Lock Washer................................................................2
21 L060033 Cutter Brace ................................................................1
22 L060013 Cutter Bolt....................................................................1
23 L083014 Link Screw ...................................................................1
24 L084001 Lock Washer................................................................2
25 L060035 Link Arm.......................................................................1
26 L060036 Spacer .........................................................................1
27 L060020 Link Pin ........................................................................2
28 L060034 Link Arm.......................................................................1
29 L060066 Cutter Blade.................................................................1
30 L060065 Cutter Hook..................................................................1
31 L060689 Lock .............................................................................1
32 L083028 Lock Screw ..................................................................1
33 F016820 Cutter Nut ....................................................................1
34 L060106 Trigger .........................................................................1
35 L060058 Pivot .............................................................................1
36 L085019 Retainer Ring...............................................................2
37 L055221 Valve Stem Guide........................................................1
Greenlee Textron / Subsidiary of Textron Inc.
23
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Orchard and Shade Tree Pruner - Parts List (cont’d)
Key Part No. Description Qty.
38 L060055 Valve Stem ..................................................................1
39 F017078 O-Ring, Valve Plug ......................................................1
40 L060042 Valve Plunger ..............................................................1
41 F010894 O-Ring .........................................................................1
42 L089019 Spring ..........................................................................1
43 L060057 Valve Cap ....................................................................1
47 L080035 Seal..............................................................................2
48 F010777 O-Ring .........................................................................1
49 L060059 Return Tube.................................................................1
50 L060054 Seal Retainer ...............................................................1
51 L060053 By-Pass Seal ...............................................................1
52 F017595 Retaining Ring .............................................................2
53 L060048 Cylinder........................................................................1
54 L081007 Rod Seal ......................................................................1
55 F010894 Piston Seal...................................................................1
56 L060012 Seal Retainer ...............................................................1
57 L060007 Bushing ........................................................................1
59 L043095 Upper End....................................................................1
60 L081005 Piston Seal...................................................................2
61 L081006 Backup Ring ................................................................2
63 L043100 Piston/Rod ...................................................................1
64 L060107 Trigger Guard ..............................................................1
65 L084015 Lock Washer................................................................2
66 F018077 Screw...........................................................................2
67 62593 Washer ........................................................................1
68 F020833 Plug..............................................................................2
69 128067 Decal............................................................................1
70 138663 Decal............................................................................1
71 48243 Decal............................................................................1
72 128011 Decal............................................................................1
73 48301 Tag, CAUTION ............................................................1
74 F018229 Ty, Plastic ....................................................................1
75 L060190 Handle .........................................................................1
Greenlee Textron / Subsidiary of Textron Inc.
24
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Closed Center Conversion for LHFS Pruners
Key Part No. Description Qty.
Remove:
49 L060059 Return Tube.................................................................1
48 F010777 O-Ring .........................................................................1
51 L060053 By-Pass Seal ...............................................................1
50 L060054 Seal Retainer ...............................................................1
52 F017595 Retaining Ring (was L058001) ....................................2
Add:
1 L060060 Return Tube.................................................................1
2 L080003 O-Ring .........................................................................1
3 L080036 O-Ring .........................................................................1
4 L060052 Seal Body ....................................................................1
5 F010777 O-Ring .........................................................................1
52 F017595 Retaining Ring (was L058001) ....................................2
52
1
Greenlee Textron / Subsidiary of Textron Inc.
49
48, 5
25
2
51
50
52
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
3
4
Orchard and Shade Tree Pruner
Appendix A
SELECTION, INSTALLATION AND MAINTENANCE OF
HOSE AND HOSE ASSEMBLIES
- SAE J1273 MAY 1986*
SAE RECOMMENDED PRACTICE
The following recommendations on selection, installation
and maintenance of hose and hose assemblies was
established by the S.A.E. in 1979 and reaffirmed May
1986. Please read these general instructions carefully.
1. SCOPE
Hose (also includes hose assemblies) has a finite life and
there are a number of factors which will reduce its life.
This recommended practice is intended as a guide to
assist system designers and/or users in the selection,
installation, and maintenance of hose. The designers and
users must make a systematic review of each application
and then select, install, and maintain the hose to fulfill the
requirements of the application. The following are general
guidelines and are not necessarily a complete list.
Improper selection, installation or maintenance
may result in premature failures, bodily injury, or
property damage.
2. SELECTION
The following is a list of factors which must be considered
before final hose selection can be made.
2.1 Pressure - After determining the system pressure,
hose selection must be made so that the recommended
maximum operating pressure is equal to or greater than
the system pressure. Surge pressures higher than the
maximum operating pressure will shorten hose life and
must be taken into account by the hydraulic designer.
2.2 Suction - Hoses used for suction applications must be
selected to insure the hose will withstand the negative
pressure of the system.
2.3 Temperature - Care must be taken to insure that fluid
and ambient temperatures, both static and transient, do
not exceed the limitations of the hose. Special care must
be taken when routing near hot manifolds.
2.4 Fluid Compatibility - Hose selection must assure
compatibility of the hose tube, cover, and fittings with fluid
used. Additional caution must be observed in hose selection for gaseous applications.
2.5 Size - Transmission of power by means of pressurized fluid varies with pressure and rate of flow. The size of
the components must be adequate to keep pressure
losses to a minimum and avoid damage to the hose due to
heat generation or excessive turbulence.
2.6 Routing - Attention must be given to optimum routing
to minimize inherent problems.
2.7 Environment - Care must be taken to insure that the
hose and fittings are either compatible with or protected
from the environment to which they are exposed. Environmental conditions such as ultraviolet light, ozone, salt
water, chemicals, and air pollutants can cause degradation and premature failure and, therefore, must be considered.
2.8 Mechanical Loads - External forces can significantly
reduce hose life. Mechanical loads which must be considered include excessive flexing, twist, kinking, tensile or
side loads, bend radius, and vibration. Use of swivel type
fittings or adapters may be required to insure no twist is
put in the hose. Unusual applications may require special
testing prior to hose selection.
2.9 Abrasion - While a hose is designed with a reasonable level of abrasion resistance, care must be taken to
protect the hose from excessive abrasion which can result
in erosion, snagging and cutting of the hose cover.
Exposure of the reinforcement will significantly accelerate
hose failure.
2.10 Proper End Fitting - Care must be taken to insure
proper compatibility exists between the hose and coupling
selected based on the manufacturer’s recommendations
substantiated by testing to industry standards such as
SAE J517d (November, 1976).
2.11 Length - When establishing proper hose length,
motion absorption, hose length changes due to pressure,
as well as hose and machine tolerances must be considered.
2.12 Specifications and Standards - When selecting hose,
government, industry, and manufacturer’s specifications
and recommendations must be reviewed and applicable.
2.13 Hose Cleanliness - Hose components vary in
cleanliness levels. Care must be taken to insure that the
assemblies selected have an adequate level of cleanliness for the application.
2.14 Electrical Conductivity - Certain applications require
that the hose be non-conductive to prevent electrical
current flow. Other applications require the hose to be
sufficiently conductive to drain off static electricity. Hose
and fittings must be chosen with these needs in mind.
Greenlee Textron / Subsidiary of Textron Inc.
26
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Orchard and Shade Tree Pruner
Appendix A (cont’d)
3. INSTALLATION
After selection of proper hose, the following factors must
be considered by the installer.
3.1 Pre-Installation Inspection - Prior to installation, a
careful examination of the hose must be performed. All
components must be checked for correct style, size, and
length. In addition, the hose must be examined for cleanliness, I.D. obstructions, blisters, loose cover, or any other
visual defects.
3.2 Follow Manufacturers’ Assembly Instructions.
3.3 Minimum Bend Radius - Installation at less than
minimum bend radius may significantly reduce hose life.
Particular attention must be given to preclude sharp
bending at the hose/fitting juncture.
3.4 Twist Angle and Orientation - Hose installations must
be such that relative motion of machine components
produces bending of the hose rather than twisting.
3.5 Securement - In many applications, it may be necessary to restrain, protect, or guide the hose to protect it from
damage by unnecessary flexing, pressure surges, and
contact with other mechanical components. Care must be
taken to insure such restraints do not produce additional
stress or wear points.
3.6 Proper Condition of Ports - Proper physical installation
of the hose requires a correctly installed port connection
while insuring that no twist or torque is put into the hose.
3.7 Avoid External Damage - Proper installation is not
complete without insuring tensile loads, side loads, kinking,
flattening, potential abrasion, thread damage, or damage
to sealing surfaces are corrected or eliminated.
3.8 System Check Out - After completing the installation,
all air entrapment must be eliminated and the system
pressurized to the maximum system pressure and checked
for proper function and freedom from leaks.
Note: Avoid potential hazardous area while testing.
4. MAINTENANCE
Even with proper selection and installation, hose life
may be significantly reduced without a continuing maintenance program. Frequency should be determined by the
severity of the application and risk potential.
A maintenance program should include the following as a
minimum.
4.1 Hose Storage - Hose products in storage can be
affected adversely by temperature, humidity, ozone,
sunlight, oils, solvents, corrosive liquids and fumes,
insects, rodents and radioactive material. Storage areas
should be relatively cool and dark, and free of dust, dirt,
dampness and mildew.
4.2 Visual Inspection - Any of the following conditions
requires replacement of the hose:
(a) Leaks at fitting or in hose. (Leaking fluid is a fire
hazard).
(b) Damaged, cut or abraded cover. (Any reinforcement
exposed).
(c) Kinked, crushed, flattened or twisted hose.
(d) Hard, stiff, heat cracked or charred hose.
(e) Blistered, soft degraded or loose cover.
(f) Cracked, damaged, or badly corroded fittings.
(g) Fitting Slippage on hose.
4.3 Visual Inspection - The following items must be
tightened, repaired, or replaced as required:
(a) Leaking port conditions.
(b) Clamps, guards, shields.
(c) Remove excessive dirt buildup.
(d) System fluid level, fluid type, and any air entrapment.
4.4 Functional Test - Operate the system at maximum
operating pressure and check for possible malfunctions
and freedom from leaks.
Note: Avoid potential hazardous areas while testing.
4.5 Replacement Intervals - Specific replacement inter-
vals must be considered based on previous service life,
government or industry recommendations, or when
failures could result in unacceptable down time, damage,
or injury risk.
Greenlee Textron / Subsidiary of Textron Inc.
*Reprinted with permission© 1990 from the Society of
Automotive Engineers, Inc. Handbook.
27
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
Greenlee Textron / Subsidiary of Textron Inc.
4455 Boeing Drive, Rockford, IL 61109-2988 USA
Customer Center and Field Service: 800/435-0786
Fax (24 Hour) Customer Center: 800/451-2632 • 815/397-1865
Canada Fax (24 Hour) Customer Center: 800/524-2853
General Offices: 815/397-7070
Printed in the U.S.A.
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