Greenlee Fairmont F20 User manual

INSTRUCTION MANUAL
Read and understand all of the instructions and
safety information in this manual before operating
or servicing this tool.
99944510 REV 13 © 2006 Greenlee Textron Inc. 1/06
F20
Portable Power Unit
Serial Code GFM and GLV
Español; p. 23
Français; p. 45

Greenlee / A Textron Company 24455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
KEEP THIS MANUAL
Table of Contents
Description ..................................................................... 2
Safety ............................................................................. 2
Purpose of this Manual .................................................. 2
Other Publications .......................................................... 2
Important Safety Information .......................................3-4
Identification ................................................................... 5
Specifications ................................................................. 6
Hose Connections .......................................................... 7
Operation ....................................................................8-9
Maintenance............................................................10-12
Troubleshooting ......................................................13-15
Service ......................................................................... 16
Illustrations and Parts List .......................................17-21
Safety
Safety is essential in the use and maintenance of
Fairmont tools and equipment. This manual and any
markings on the tool provide information for avoiding
hazards and unsafe practices related to the use of this
tool. Observe all of the safety information provided.
Purpose of this Manual
This manual is intended to familiarize all personnel with
the safe operation and maintenance procedures for the
Fairmont F20 Portable Power Unit (50458957).
Keep this manual available to all personnel.
Replacement manuals are available upon request
at no charge.
Other Publications
Tool Owners/Users
SAE Standard J1273 (Hose and Hose Assemblies):
Publication 99930323
Description
The F20 Portable Power Unit is a compact unit providing
a variable flow of 18.9 to 37.9 l/min (5 to 10 gpm) and a
maximum pressure of 138 bar (2000 psi). It is a light-
weight power source intended for use with open-center
system hydraulic tools. HTMA couplers are provided for
tool connection.
Its compact size and light weight allow use at remote
work sites that might not be accessible by a larger power
unit or hydraulic truck. The ability to get close to the work
area allows the use of shorter hydraulic hoses, increas-
ing tool efficiency.
The simple design of the hydraulic circuit and reliable
Honda gasoline-powered engine ensure years of
trouble-free operation, when serviced according to the
recommended maintenance schedule. Other features
include a large capacity oil cooler, sight level gauges,
engine hour/rpm meter, pneumatic tires, foldaway
handles, and a sealed lead acid battery.
All specifications are nominal and may change as design improve-
ments occur. Greenlee Textron Inc. shall not be liable for damages
resulting from misapplication or misuse of its products.
Do not discard this product or throw away!
For recycling information, go to
www.greenlee.com.

Greenlee / A Textron Company 34455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
IMPORTANT SAFETY INFORMATION
This symbol is used to call your attention to hazards
or unsafe practices which could result in an injury
or property damage. The signal word, defined below,
indicates the severity of the hazard. The message
after the signal word provides information for prevent-
ing or avoiding the hazard.
Hazards or unsafe practices which, if not avoided,
MAY result in injury or property damage.
Hazards which, if not avoided, COULD result in
severe injury or death.
Immediate hazards which, if not avoided, WILL result
in severe injury or death.
SAFETY
ALERT
SYMBOL
Read and understand all of the
instructions and safety information
in this manual before operating or
servicing this tool.
Failure to observe this warning will
result in severe injury or death.
Fuel is flammable and explosive.
• Stop engine before filling fuel tank.
• Do not fill fuel tank when engine
is hot.
• Do not fill fuel tank near an open
flame, sparks, or when smoking.
Failure to observe this warning will
result in severe injury or death.
Do not run power unit engine in a
confined area.
Engine exhaust fumes are toxic.
If inhaled, exhaust fumes could
cause injury or death.
Wear eye protection when operating
or servicing this tool.
Failure to wear eye protection could
result in serious eye injury from
flying debris or hydraulic oil.
Do not disconnect tool, hoses or fittings while the
power source is running or if the hydraulic fluid is
hot. Hot hydraulic fluid could cause serious burns.
Skin injection hazard:
Oil under pressure easily punctures
skin, causing serious injury, gan-
grene, or death. If you are injured by
escaping oil, seek medical attention
immediately.
• Do not use hands to check for
leaks.
• Do not hold hose or couplers while
the hydraulic system is pressurized.
• Depressurize the hydraulic system
before servicing or disconnecting
hoses.
Wear hearing protection when using
this tool.
Long-term exposure to high noise
levels could result in hearing loss.

Greenlee / A Textron Company 44455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
IMPORTANT SAFETY INFORMATION
Note: Keep all decals clean and legible, and replace
when necessary.
Do not let power unit engine run unattended.
Monitor the engine so that it can be shut down
immediately in case of a malfunction.
Failure to observe this warning could result in
severe injury or death.
• Inspect the hydraulic hoses and couplings every
operating day. Repair or replace if leakage, crack-
ing, wear, or damage is evident. Damaged hoses
or couplers may fail, resulting in injury or property
damage.
• Use this power source for manufacturer’s intended
purpose only. Use other than that which is
described in this manual may result in injury or
property damage.
• Make sure that all bystanders are clear of the work
area when handling, starting, and operating the
power unit. Nearby personnel may be injured by
flying parts in the event of a tool malfunction.
Hydraulic oil may cause skin irritation.
• Handle the tool and hoses with care to prevent
skin contact with hydraulic oil.
• In case of accidental skin contact with hydraulic
oil, wash the affected area immediately to remove
the oil.
Failure to observe these precautions may result in
injury.
Engine, exhaust system, and other
components will be hot during and
after operation. Use care when
working around the power unit. Hot
surfaces could cause serious burns.
• Do not operate power unit without
safety guards in place.
• Keep all parts of the body and
loose clothing away from the
engine fan.
Emergency stop procedure: Switch the engine OFF.
Procedure for connecting or disconnecting hydraulic
hoses, fittings or components:
1. Rotate the flow control knob to the OFF
position.
2. Switch the engine OFF.
3. Follow the sequence under “Hose Connections”
to prevent pressure buildup. In case some
pressure has built up, loosen hoses, fittings, or
components slowly.
Use the lifting eye and appropriate lifting equip-
ment. Make sure all components used to lift this
power unit are rated for 159 kg (350 lb) and are
securely attached to the frame of the power unit.
Inadequate components may fail and cause the
power unit to fall, resulting in injury or property
damage.

Greenlee / A Textron Company 54455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Identification
F20 Portable Power Unit
1. Gasoline Engine, 20 hp
2. Hydraulic Pump
3. Handle
4. Hydraulic Oil Filter
5. Fuel Tank
6. Hydraulic Reservoir
7. Oil Cooler
8. Flow ON /OFF Valve
9. Tool Connection—Pressure
10. Tool Connection—Return
11. Battery
12. Lifting Bracket
13. Hour Meter
14. Oil Fill Cap
15. Oil Fluid Level Gauge
8
12
3
1
13
6
4
5
2
7
10
14
15
11
2
8
9

Greenlee / A Textron Company 64455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Specifications
Hydraulic Schematic
Recommended Hydraulic Fluids
Any non-detergent, petroleum-based, hydraulic fluid
which meets the following specifications or HTMA
specifications may be used.
S.U.S. @
38 °C (100 °F ) .......................................... 140 to 225
99 °C (210 °F) ......................................... 40 minimum
Flash Point ............................. 170 °C (340 °F) minimum
Pour Point ............................... -34 °C (-30 °F) minimum
Portable Power Unit
Weight (dry)............................................ 118 kg (259 lb)
Height
Handles up.......................................... 102 cm (40 in)
Handles down ....................................... 81 cm (32 in)
Length
Handles up.......................................... 107 cm (42 in)
Handles down ....................................... 86 cm (34 in)
Width ......................................................... 79 cm (31 in)
Fuel Capacity .......................................... 12.5 l (3.3 gal)
Hydraulic Oil Capacity ............................. 11.7 l (3.1 gal)
Rated Flow (variable) ......... 19 to 38 l/min (5 to 10 gpm)
Operating Pressure ........................... 138 bar (2000 psi)
Type of Hydraulic System ........................... Open-center
Pressure Port (1/2" NPT) ................. HTMA male coupler
Return Port (1/2" NPT) .................. HTMA female coupler
Filtration .......................................... 10 micron (nominal)
Battery—Automotive Type (sealed lead acid battery)
Honda Air-cooled Gasoline Engine Model GX620
Horsepower (maximum) .....................20 hp @ 3600 rpm
Torque (maximum) .......................... 44.13 Nm (32.5 ft-lb)
@ 2500 rpm
TYPICAL
TOOL
PRESSURE
PORT (P)
RETURN
PORT (T)
RETURN
PORT (T)
PRESSURE
PORT (P)
CONTROL
VALVE
RELIEF
VALVE
(2000 psi)
138 bar
OIL
COOLER
FILTER
(10 micron)
ENGINE
PUMP
POWER
UNIT

Greenlee / A Textron Company 74455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Hose Connections
Connecting Hoses
1. Stop the power unit hydraulic flow.
2. Connect the return (tank) hose from the power unit
port to the tool return port (T).
Note: Return (tank) hose connection should always
be connected before pressure (supply) hose con-
nection to prevent pressure buildup inside the tool.
3. Connect the pressure (supply) hose from the power
unit pressure port to the tool pressure port (P).
Disconnecting Hoses
1. Stop the power unit hydraulic flow.
2. Disconnect the pressure (supply) hose from the
power unit pressure port to the tool pressure port (P).
Note: Pressure (supply) hose connection should
always be disconnected before return (tank)
hose connection to prevent pressure buildup inside
the tool.
3. Disconnect the return (tank) hose from the power
unit return port to the tool return port (T).
4. To prevent contamination, always install dust caps
over the hydraulic ports of the tool, hoses, and
power unit when disconnected.
Do not disconnect tool, hoses, or fittings while
the power unit is running or if the hydraulic fluid
is hot. Hot hydraulic fluid could cause serious burns.
Failure to observe this warning could result in
severe injury.

Greenlee / A Textron Company 84455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Operation
Fuel is flammable and explosive.
• Stop engine before filling fuel tank.
• Do not fill fuel tank when engine
is hot.
• Do not fill fuel tank near an open
flame, sparks, or when smoking.
Failure to observe this warning will
result in severe injury or death.
Do not run power unit engine in a
confined area.
Engine exhaust fumes are toxic.
If inhaled, exhaust fumes could
cause injury or death.
Wear eye protection when operating
or servicing this tool.
Failure to wear eye protection could
result in serious eye injury from
flying debris or hydraulic oil.
Do not disconnect tool, hoses or fittings while the
power source is running or if the hydraulic fluid is
hot. Hot hydraulic fluid could cause serious burns.
Skin injection hazard:
Oil under pressure easily punctures
skin, causing serious injury, gan-
grene, or death. If you are injured by
escaping oil, seek medical attention
immediately.
• Do not use hands to check for
leaks.
• Do not hold hose or couplers while
the hydraulic system is pressurized.
• Depressurize the hydraulic system
before servicing or disconnecting
hoses.
Wear hearing protection when using
this tool.
Long-term exposure to high noise
levels could result in hearing loss.
Do not let power unit engine run unattended.
Monitor the engine so that it can be shut down
immediately in case of a malfunction.
Failure to observe this warning could result in
severe injury or death.
Engine, exhaust system, and other
components will be hot during and
after operation. Use care when
working around the power unit. Hot
surfaces could cause serious burns.
• Do not operate power unit without
safety guards in place.
• Keep all parts of the body and
loose clothing away from the
engine fan.

Greenlee / A Textron Company 94455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Pre-Start
1. Check engine oil level. Running the engine with a
low oil level can cause engine damage. The oil alert
system will automatically stop the engine before the
engine oil level falls below safe limits. However, to
avoid the inconvenience of an unexpected shutdown,
always check the engine oil level before startup.
Refer to the Engine Owner’s Manual for correct oil
type and checking instructions.
2. Check fuel level. Refer to the Engine Owner’s
Manual for fuel recommendations.
3. Check hydraulic reservoir oil level. Fill to FULL level
as shown on hydraulic fluid level decal. Refer to
“Recommended Hydraulic Fluids” for correct
hydraulic fluid.
4. Check the air filter. A dirty air filter will restrict air flow
to the carburetor, reducing engine performance.
5. Verify that all current maintenance has been per-
formed on the power unit. Refer to the “Maintenance”
section.
Starting the Power Unit
1. If the fuel tank is equipped with a fuel valve, be sure
the valve is in the OPEN or ON position before
attempting to start the engine.
2. To start a cold engine, pull the choke knob out to the
CLOSED position. To start a warm engine, leave the
choke knob in the OPEN position.
Operation (cont’d)
3. Move the throttle lever away from the SLOW posi-
tion, about 1/3 of the way to the FAST position.
4. Turn the engine switch to the ON position.
5. Operate the starter by turning the key to the START
position and holding it there until the engine starts.
If the engine fails to start within 5 seconds, release
the key and wait at least ten
seconds before operating
the starter again.
Note: Using the electric
starter for more than five
seconds at a time will
overheat the starter motor
and can damage it.
6. When the engine starts,
release the key, allowing it
to return to the ON position.
7. If the choke knob has been
pulled to the CLOSED
position to start the engine,
gradually push it to the OPEN position as the engine
warms up.
Stopping the Engine
To stop the engine in an emergency, simply turn the
engine switch to the OFF position. Under normal condi-
tions, use the following procedure.
1. Move the throttle lever to the SLOW position.
2. Turn the engine switch to the OFF position.
3. Turn the fuel valve to the CLOSED or OFF position.
Lifting the Power Unit
Position the power unit on firm level ground.
Use the lifting eye and appropriate lifting equip-
ment. Make sure all components used to lift this
power unit are rated for 159 kg (350 lb) and are
securely attached to the frame of the power unit.
Inadequate components may fail and cause the
power unit to fall, resulting in injury or property
damage.
OFF ON START
ENGINE
SWITCH
Stop the power unit engine before lifting. Take care
when attaching the lifting device (chain, strap, etc.) to
the lifting eye so as not to damage the power unit.
CHOKE KNOB
OPEN
CLOSED
SLOW
FAST
THROTTLE LEVER

Greenlee / A Textron Company 10 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Maintenance
Depressurizing Hydraulic System
Hydraulic system must be depressurized when perform-
ing maintenance or repair on the power unit hydraulic
system. Depressurizing the hydraulic system also makes
tool hose connections/disconnections easier.
1. Stop power unit engine.
2. Move flow ON/OFF lever to the ON position.
System will be depressurized.
3. Before restarting power unit engine, move flow
ON/OFF lever to the OFF position.
Fuel is flammable and explosive.
• Stop engine before filling fuel tank.
• Do not fill fuel tank when engine
is hot.
• Do not fill fuel tank near an open
flame, sparks, or when smoking.
Failure to observe this warning will
result in severe injury or death.
Skin injection hazard:
Oil under pressure easily punctures
skin, causing serious injury, gan-
grene, or death. If you are injured by
escaping oil, seek medical attention
immediately.
• Do not use hands to check for
leaks.
• Do not hold hose or couplers while
the hydraulic system is pressurized.
• Depressurize the hydraulic system
before servicing or disconnecting
hoses.
Do not run power unit engine in a
confined area.
Engine exhaust fumes are toxic.
If inhaled, exhaust fumes could
cause injury or death.
Do not disconnect tool, hoses or fittings while the
power source is running or if the hydraulic fluid is
hot. Hot hydraulic fluid could cause serious burns.
• Inspect the hydraulic hoses and couplings every
operating day. Repair or replace if leakage, crack-
ing, wear, or damage is evident. Damaged hoses
or couplers may fail, resulting in injury or property
damage.
• Use this power source for manufacturer’s intended
purpose only. Use other than that which is
described in this manual may result in injury or
property damage.
• Make sure that all bystanders are clear of the work
area when handling, starting, and operating the
power unit. Nearby personnel may be injured by
flying parts in the event of a tool malfunction.

Greenlee / A Textron Company 11 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Sight Gauge Location
Maintenance (cont’d)
The service life of the power unit will be maximized
by proper care and maintenance. The maintenance
schedule below is recommended.
Note: Change engine oil after the first 5 hours of
operation. Thereafter, change engine oil according to
the maintenance schedule below.
Every 5 Hours
1. Check engine crankcase oil level. Fill if necessary.
Refer to the Engine Owner’s Manual.
2. Check fuel tank level. Fill if necessary.
Refer to the Engine Owner’s Manual.
3. Check hydraulic reservoir oil level. Fill to FULL mark
on sight gauge. Do not overfill reservoir. Refer to the
“Recommended Hydraulic Fluids” section.
Every 10 Hours
1. Wipe all power unit surfaces clean of grease,
dirt, and foreign material.
2. Inspect the hydraulic system hoses and fittings
for signs of leaks, cracks, wear, or damage.
Replace if necessary.
Every 25 Hours
Service engine air cleaner/pre-cleaner. Refer to the
Engine Owner’s Manual.
Every 50 Hours
Change engine crankcase oil and oil filter. Refer to the
Engine Owner’s Manual.
Every 100 Hours or Once Yearly
1. Drain hydraulic reservoir oil. Clean and flush reser-
voir. Change hydraulic oil filter. Fill reservoir with
new, clean hydraulic oil. Refer to “Recommended
Hydraulic Fluids” section. Operate power unit to
circulate oil through the hydraulic system. Stop
power unit. Recheck hydraulic oil level. Fill reservoir
to the FULL mark on the sight gauge. Do not overfill
reservoir.
2. Service engine air cleaner cartridge. Refer to the
Engine Owner’s Manual.
3. Perform a detailed inspection of the system
hoses and fittings as stated in 99930323—
SAE Standard J1273. Replace the hoses and/or
fittings if necessary.
Sight Gauge
FLUID LEVEL
ADD FLUID OK FULL

Greenlee / A Textron Company 12 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Maintenance (cont’d)
Stop engine when checking battery
electrolyte level. Do not check or
fill battery electrolyte level near
an open flame, sparks, or when
smoking. Battery fumes are flam-
mable and explosive, and if ignited
will result in severe injury or death.
When working on or around the battery:
• Remove jewelry, wristwatches and any other
conductive items. The current produced by the
battery could cause severe burns.
• Wear eye protection and gloves and handle the
battery carefully. Contact with battery acid could
cause severe burns or blindness.
Failure to observe these warnings could result in
severe injury or death.
Battery Battery Maintenance and Replacement
Battery is a utility style, sealed lead acid type. Clean
battery terminals and cable clamps when required. After
cleaning, coat battery terminals and cable clamps with
grease or other suitable product to reduce corrosion.
When battery replacement becomes necessary, it is
recommended that replacement battery should meet or
exceed original battery specifications; amps, cranking
power, etc.
When disconnecting battery cables, remove the black
cable first from the negative (–) battery post and then the
red cable from the positive (+) battery post.
When connecting the battery cables, attach the red
cable to the positive (+) battery post first and the black
cable to the negative (–) battery post last.
Pneumatic Tires
Inflate power unit tires to the recommended pressure
printed on the sidewalls of the tires. Do not exceed
tire manufacturer’s recommended maximum pres-
sure printed on the sidewalls of the tires or rim
manufacturer’s recommended maximum pressure
stamped on the rim, whichever is lower.

Greenlee / A Textron Company 13 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Troubleshooting
Before You Begin
1. Any tool used with this power unit must be an
open-center system type tool.
2. Verify that the pressure and return hoses are
connected properly to the power unit and tool ports.
3. Power unit reservoir must be filled to the FULL mark
with hydraulic fluid.
4. Start the power unit hydraulic oil flow. All separate
shut-off devices must be opened (ON/OFF valves,
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 power unit, tool, or hoses and the
problem area. The following steps will help to
determine the problem area.
Determine the Problem Area
1. Stop the power unit hydraulic oil flow. Disconnect
the existing tool from the hoses and power unit.
2. Connect a known working tool to the hoses and
power unit. Refer to the tool’s operator’s manual for
correct hookup procedure. Start the power unit
hydraulic oil flow.
• If the known working tool operates, the problem
is in the disconnected tool. Refer to the tool
operator’s manual for troubleshooting.
• If the known working tool does not operate, the
problem is likely to be in the hoses or the power
unit. Proceed to Step 3.
3. Stop the power unit hydraulic oil flow. Disconnect
the existing hoses from the known working tool and
power unit.
4. Connect a different set of hoses to the known
working tool and power unit. Start the power unit
hydraulic oil flow.
• 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 unit. Refer to the
troubleshooting charts in this manual.

Greenlee / A Textron Company 14 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Troubleshooting (cont’d)
Engine does not turn over. Battery weak or dead. Recharge or replace battery.
Battery cables corroded. Clean battery cable terminals or
replace cables.
Electrical short, broken wire, or loose Check wires and connections.
connection. Repair or replace.
Engine starter inoperative. Repair or replace starter.
Refer to the engine operator’s manual.
Engine turns over, but does No fuel in tank. Fill fuel tank.
not start.
Flow ON/OFF handle in the ON Move handle to the OFF position.
position.
Electrical short, broken wire, or loose Check wires and connections.
connection. Repair or replace.
Refer to the engine operator’s manual.
Engine lacks power, runs Refer to the engine operator’s manual.
rough, backfires, etc.
Tool used with power unit is Flow ON/OFF valve in the OFF position. Move flow ON/OFF valve to ON
inoperative. position.
Tool is a closed-center system type. Use only open-center system tools.
No hydraulic fluid in system or fluid Check fluid level. Fill to FULL mark.
level low. Check system for leaks.
Incorrect hydraulic fluid viscosity. Use fluid viscosity recommended.
Refer to “Recommended Hydraulic Fluids.”
Hydraulic filter needs service. Replace hydraulic filter.
Power unit components (pump, valve, Repair or replace components.
etc.) worn or damaged.
Engine output insufficient. Engine Refer to the engine operator’s manual.
needs adjustment, tune-up, etc.
Problem Probable Cause Probable Remedy

Greenlee / A Textron Company 15 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Troubleshooting (cont’d)
Tool used with power unit Hydraulic fluid cold. Viscosity of oil may be too high at
operates erratically. 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.
Hydraulic fluid level low. Check fluid level. Fill to FULL mark.
Check system for leaks.
Incorrect hydraulic fluid viscosity. Use fluid viscosity recommended.
Refer to “Recommended Hydraulic Fluids.”
Air in system. Check pump suction line for damage
or loose clamps. Tighten clamps or
replace components if necessary.
Fill reservoir.
Hydraulic oil flow (gpm) incorrect for Adjust engine rpm to achieve
tool being used. correct flow (gpm) for tool being used.
Hydraulic filter needs service. Replace hydraulic filter.
Power unit components (pump, valve, Repair or replace components.
etc.) worn or damaged.
Engine output insufficient. Engine Refer to the engine operator’s manual.
needs adjustment, tune-up, etc.
Tool used with power unit Hydraulic fluid level low. Check fluid level. Fill to FULL mark.
feels hot. Check system for leaks.
Hydraulic fluid viscosity too light. Use fluid viscosity recommended.
Refer to “Recommended Hydraulic Fluids.”
Hydraulic fluid dirty. Drain reservoir, flush and fill with
clean fluid. Change filter.
Hydraulic oil flow (gpm) incorrect Adjust engine rpm to achieve
for tool being used. correct flow (gpm) for tool being
used.
Tool used with power unit Hydraulic flow to tool reversed. Reverse flow to tool. Check for
operates backward. valve in system that has reversed
flow. Check hoses for proper flow.
Hydraulic pressure and return lines Disconnect hoses. Reverse
connected to incorrect power unit or couplers. Reconnect hoses to
tool ports. proper power unit and tool ports.
Problem Probable Cause Probable Remedy

Greenlee / A Textron Company 16 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Disassembly
Loosen clamps (74) on suction hose (75). Loosen
elbow (76) and rotate to disconnect from suction hose.
Remove hose assembly (16) from discharge side of
pump. Remove cap screws (69) and washers (33),
holding pump onto pump adapter (86). Slide pump out
of coupling (85).
Assembly
Slide pump (84) up into the coupling (85), lining up key
and key slot in pump shaft and coupling I.D. Install
washers (33) and cap screws (69) through pump flange
and into pump adapter (86) and tighten. Rotate elbow
(76) into suction hose (75) and tighten clamps (74) onto
reservoir tube and elbow. Install hose assembly (16)
onto the discharge side of the pump and tighten. Ensure
hose assembly does not touch other hoses or parts of
the power unit that could cause wear due to vibration.
Service
Complete disassembly of the power unit is not neces-
sary or recommended. Any service requirements that
need to be addressed with the engine or its components
will be covered in the engine manufacturer’s Owner’s
Manual.
It is anticipated that only two other items could require
servicing on this unit—the hydraulic pump and the relief
valve. This section will cover the removal and replace-
ment of these items.
Relief Valve
If the system relief pressure settings cannot be adjusted
to obtain the maximum system pressure as identified in
Specifications, the relief valve (80) needs to be removed
from the manifold block (83), and replaced.
Hydraulic Pump

Greenlee / A Textron Company 17 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Illustration—Decal Locations
10
31
11
12
95
29
13
96
72
108

Greenlee / A Textron Company 18 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Illustration—F20
8
87
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109
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619
101
46 100
46
75
69 33 84
78
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71 73 74 15
103
85
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63
59
57
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6933
76
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109
102
25
27
28,92
26
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51
39
43
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40
42 8
6
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44
48
50
33
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94
35
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34 35
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49
49
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7
6
41

Greenlee / A Textron Company 19 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Key Part No. Description Qty
1 50458680 Handle ............................................................................................. 1
2 50458663 Plate, adapter .................................................................................. 2
3 50458434 Engine, 20 hp .................................................................................. 1
4 50458736 Muffler ............................................................................................. 1
5 50458515 Bracket, lift ...................................................................................... 1
6 F024673 Screw, cap, 1/4-20 x 1-3/4, button head ....................................... 28
7 90527070 Washer, flat, 1/4 ............................................................................ 36
8 F013588 Nut, 1/4-20, Nylok ......................................................................... 30
9 F012147 Clamp, hose .................................................................................... 4
10 50462466 Decal, Fairmont ............................................................................... 1
11 50455206 Decal, warning ................................................................................ 1
12 50462300 Decal, ON/OFF ............................................................................... 1
13 50458930 Decal, identification F20 .................................................................. 1
15 50456247 Hose, cooler to filter ........................................................................ 2
16 50458590 Hose assembly, pump..................................................................... 1
17 F024695 Elbow, 90°....................................................................................... 3
18 F024678 Cap, gas .......................................................................................... 1
19 50458744 Tank, fuel ........................................................................................ 1
21 50462806 Elbow, 90°....................................................................................... 1
22 F016087 Fitting, hose..................................................................................... 1
23 F030032 Clamp, hose .................................................................................... 2
24 F011580 Plug, 1/2 pipe, square head ............................................................ 1
25 50458523 Cartridge, filter................................................................................. 1
26 50458507 Reservoir, hydraulic ........................................................................ 1
27 50458531 Adapter, filter cartridge .................................................................... 1
28 50498495 Hose, gas line, 42" .......................................................................... 1
29 50462407 Decal, knob ..................................................................................... 1
30 F016578 Wrap, tie .......................................................................................... 7
31 50458710 Decal, rpm vs gpm .......................................................................... 1
32 F002831 Screw, cap, 5/16-18 x .87 hex head ............................................... 6
33 90514343 Washer, 3/8 flat ............................................................................. 14
34 F004635 Nut, 5/16 Nylok.............................................................................. 12
35 90553497 Knob ................................................................................................ 2
36 F030027 Meter, tach/hour .............................................................................. 1
37 90505727 Screw, cap, #8-32 x .500 socket head ............................................ 2
38 50458671 Frame, right ..................................................................................... 1
39 F001753 Washer, flat, 3/4 .............................................................................. 6
40 90552989 Pin ................................................................................................... 2
41 50462474 Tube, side ....................................................................................... 2
42 50458752 Axle ................................................................................................. 1
43 90553730 Wheel .............................................................................................. 2
44 50458655 Base, frame ..................................................................................... 1
45 50458485 Foot, front ........................................................................................ 2
46 90553489 Pad, foot .......................................................................................... 2
47 90508777 Screw, cap, 1/4-20 x 1-1/4 hex head .............................................. 2
48 90505352 Screw, cap, 3/8-16 x 2.00 hex head ............................................... 4
Parts List

Greenlee / A Textron Company 20 4455 Boeing Dr. • Rockford, IL 61109-2988 • 815-397-7070
F20 Portable Power Unit
Parts List (cont’d)
49 50462814 Spacer, threaded............................................................................. 2
50 90555198 Nut, 3/8-16 Nylok ............................................................................ 4
51 50458698 Frame, left ....................................................................................... 1
52 50458604 Shroud, fan...................................................................................... 1
53 90542967 Nut, #8-32, Nylok ............................................................................ 2
54 50458477 Fan, cooler ...................................................................................... 1
55 50458450 Cooler, hydraulic ............................................................................. 1
56 50458612 Shroud, control panel ...................................................................... 1
57 90555350 Screw, carriage, 1/4-20 x 1/2 .......................................................... 2
58 90521080 Nut, 1/4 hex ..................................................................................... 2
59 90553470 Cover, battery terminal .................................................................... 1
60 50458574 Cover, terminal ................................................................................ 1
61 50458566 Cable unit, starter ............................................................................ 1
62 50458558 Cable unit, ground ........................................................................... 1
63 91868254 Battery, 12V .................................................................................... 1
64 50462822 Tie-down, 10" .................................................................................. 1
65 50459392 Wire assembly, fan.......................................................................... 1
66 50459406 Wire assembly, fan.......................................................................... 1
67 91870879 Connector, bullet-female ................................................................. 2
68 F011243 Fitting, 1/2 nipple ............................................................................. 2
69 F010324 Screw, cap, 3/8-16 x 1.00 socket head ........................................... 6
70 905 53748 Bracket, mounting ........................................................................... 4
71 504 58795 Cap, breather .................................................................................. 1
72 504 95356 Decal, hydraulic level ...................................................................... 1
73 504 58426 Sight, hydraulic fluid level................................................................ 1
74 F022989 Clamp, hose .................................................................................... 2
75 50458620 Hose, suction .................................................................................. 1
76 F024677 Elbow, 90°....................................................................................... 1
78 50462849 Connector, straight .......................................................................... 1
79 50121413 Fitting, hose, 1/2 NPTF, 3/4-16 UNF (serial code GLV).................. 1
F030031 Fitting, hose, 1/2 NPTF (serial code GFM) ..................................... 1
80 F022687 Valve, relief ..................................................................................... 1
81 90549252 Coupler, QD female, 3/4-16 SAE (serial code GLV) ....................... 1
F020196K Coupler, QD female, 1/2-14 NPSF (serial code GFM) .................... 1
82 90549236 Coupler, QD male, 3/4-16 SAE (serial code GLV) .......................... 1
F020197K Coupler, QD male, 1/2-14 NPSF (serial code GFM) ....................... 1
83 50121421 Block, manifold (serial code GLV) ................................................... 1
50458493 Block, manifold (serial code GFM) .................................................. 1
84 90550129 Pump ............................................................................................... 1
85 50458760 Coupling .......................................................................................... 1
86 90550064 Adapter, pump................................................................................. 1
87 F022549 Screw, cap, 1/4-20 x 1/2 button head ............................................. 2
88 90555171 Washer, split lock, 1/4 ..................................................................... 2
89 F018357 Plug, pipe, 1/8 ................................................................................. 2
90 50458582 Valve, control .................................................................................. 1
Key Part No. Description Qty.