FTI LB-10 Operating instructions

57429 Revision L, Log #01151
FTI OPERATIONS, MAINTENANCE, AND REPAIR MANUAL
Little Brute Puller Unit
FTI Part #2720-006, Log #01151
Revision L
May 4, 2022
401 Andover Park East
Seattle, Washington 98188-7605
USA [phone]
Original Instruction

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L
ABOUT FATIGUE TECHNOLOGY INC.
Fatigue Technology Inc. (FTI) is a world-leading aerospace engineering and manufacturing company. FTI
pioneered Cold Expansion (Cx™) technology (which provides solutions to fatigue problems associated with holes
in metal structures) back in 1969 and has advanced this science to develop innovative bushing and fastener
products. These proprietary products and associated tooling may be covered by patents or agreements owned by, or
exclusively licensed to, Fatigue Technology Inc. Use of tooling procured from other than a licensed source may
constitute patent infringement.
The detailed tooling information in this manual was compiled and written by FTI. The tooling was designed
specifically for use with FTI’s Cold Expansion systems. FTI cannot be held responsible for damage or injury as a
result of operating this equipment if it is used for other than the process intended, with any other tooling not
provided by FTI, or not used in accordance with the instructions contained in this manual. To avoid personal
injury, please observe all safety precautions and instructions. FTI reserves the right to change specifications or
configurations of equipment detailed in this manual as part of our ongoing technical and product improvement
programs. If you have any questions about the use or serviceability of this equipment, please contact our Sales
Department.
FTI’s Cold Expansion systems and processes are the subject matter of one or more of the following patents:
4,809,420; 4,885,829; 4,934,170; 5,083,363; 5,096,349; 5,103,548; 5,127,254; 5,129,253; 5,218,854; 5,245,743;
5,305,627; 5,341,559; 5,380,136; 5,405,228; 5,433,100; 5,468,104; 6,077,010; 6,183,180; 6,487,767; 6,792,657;
6,990,722; 7,024,908; 1,061,276; 513,898; 692015124; 581,385; 69310828; 468,598; 69105390; 643,231;
69414946; 696,686; 785,366; 1032769; and other patents pending. These systems and processes are tooling critical
and must be performed in accordance with FTI’s specifications or controlling documents. To ensure proper results
from FTI’s Cold Expansion systems and to be licensed to use FTI’s patented processes, it is essential that FTI’s
complete integrated system of tooling be purchased and utilized. The use of tooling purchased from other than a
licensed supplier could jeopardize fatigue life enhancement and may constitute patent infringement.
Fatigue Technology Inc. (FTI) has provided innovative solutions to fatigue problems in metal structures since 1969.
Complete systems of tooling are used worldwide to enhance the fatigue life of holes in airframes, turbine engines,
and other critical structures.
The FTI staff of professionals provides a full range of support services including:
•Application engineering
•Detailed project planning, implementation, and management
•On-site assistance, including training and tool room setup
The Sales Department is always available to assist with special fatigue enhancement requirements. Please contact
FTI with questions at any time.
This manual can be made available in other languages. Please contact the Sales Department to request a copy.

Fatigue Technology 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1.0 Introduction......................................................................................................................................... 1
1.1 About the Little Brute Puller Unit ........................................................................................... 1
1.2 General Description................................................................................................................. 1
1.3 General Specifications............................................................................................................. 2
2.0 Safety .................................................................................................................................................. 4
3.0 Puller Unit Operating Instructions ...................................................................................................... 6
3.1 Puller Unit Setup Procedure and Operation............................................................................. 6
3.2 Activation of Puller Unit ......................................................................................................... 6
4.0 Puller Unit Maintenance ..................................................................................................................... 7
4.1 General Cleaning..................................................................................................................... 7
4.2 Lubrication .............................................................................................................................. 7
4.3 Inspection ................................................................................................................................ 7
4.4 Disassembly............................................................................................................................. 7
4.5 Re-Assembly ........................................................................................................................... 9
5.0 Troubleshooting ................................................................................................................................ 10
6.0 Illustrated Parts Breakdown.............................................................................................................. 14
6.1 Little Brute Rework Kit; Parts List and Diagram.................................................................. 15
6.2 Little Brute Seal Kit; Parts List and Diagram........................................................................ 16
6.3 Previous Little Brute Trigger Assembly; Parts List and Diagram......................................... 17
6.4 Little Brute Puller Assembly; Parts List and Diagram .......................................................... 18
7.0 Shipping/Receiving Bill of Materials ............................................................................................... 21
FIGURES
Figure 1.3-1 Little Brute Puller Unit Parts .............................................................................................................. 2
Figure 1.3-2 Little Brute Specifications .................................................................................................................. 3
Figure 2.0-1 Safety Stickers .................................................................................................................................... 4
Figure 2.0-2 Location of Air Disconnect................................................................................................................. 4
Figure 5.0-1 FT-20 PowerPak ............................................................................................................................... 10
Figure 5.0-2 FT-200 PowerPak ............................................................................................................................. 10
Figure 5.0-3 Hydraulic Quick Coupler.................................................................................................................. 11
Figure 5.0-4 Location of Hydraulic Quick Coupler (FT-200)............................................................................... 11
Figure 5.0-5 Location of Hydraulic Quick Coupler (FT-20)................................................................................. 11
Figure 5.0-6 Enerpac CT-604 Pressure Relief Tool .............................................................................................. 11
Figure 5.0-7 Trigger Response Valves .................................................................................................................. 12
Figure 5.0-8 Pressure Gage (FT-200).................................................................................................................... 13

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L
TABLE OF CONTENTS (Continued)
SECTION DESCRIPTION PAGE
Figures (Continued)
Figure 6.1-1 Diagram of Little Brute Rework Kit Parts (LB-CT-RK) .................................................................. 15
Figure 6.2-1 Diagram of Little Brute Assembly (LB-SK)..................................................................................... 16
Figure 6.3-1 Diagram of Previous Little Brute Trigger Assembly........................................................................ 17
Figure 6.4-1 Little Brute Assembly....................................................................................................................... 18
TABLES
Table 6.0-1 Trigger Assembly Conversion .......................................................................................................... 14
Table 6.1-1 Parts List for Little Brute Rework Kit .............................................................................................. 15
Table 6.2-1 Little Brute Seal Kit (LB-SK)........................................................................................................... 16
Table 6.3-1 Previous Little Brute Trigger Assembly ........................................................................................... 17
Table 6.4-1 Little Brute Parts List........................................................................................................................ 19

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L 1
SECTION 1.0: INTRODUCTION
This instruction manual contains information on the operation and maintenance of the Little Brute (LB) Puller Unit.
To obtain optimum performance and many years of trouble-free service, operate the puller unit properly and
carefully follow maintenance procedures.
Read this manual before operating the puller unit and retain it for future reference.
1.1 ABOUT THE LITTLE BRUTE PULLER UNIT
The Little Brute hydraulic puller unit is a powerful, small, lightweight tool specifically designed for use with
Fatigue Technology Inc. (FTI) patented Split Sleeve Cold Expansion™ (SsCx™) process. The Little Brute
Puller Unit is designed to pull a mandrel through a hole with the pre-lubricated stainless steel split sleeves used
in this process.
The Little Brute puller has a maximum pull force of 8,000 pounds (35,584N) at 10,000 psi (68.95MPa) pump
pressure. The Little Brute is available in six sizes (models) for cold expanding holes up to 1/2 inch (12.7 mm) in
diameter and 3-1/2 inches (88.9 mm) deep in aluminum, and 3/8 inch (9.53 mm) in diameter and 3-1/2 inches
(88.9 mm) deep in steel and titanium.
The Little Brute is available in various models to accommodate multiple material stack-ups, hose options, and
mandrel adapters.
LB-xx where ‘-xx’ relates to material stack (see Figure 1.3-2)
LB-xx-V where ‘-V’ represents high visibility hoses
LB-xx-Hxx where ‘-Hxx’ represents a unique hose length other than the standard 10 feet
LB-xxA comes with a LB-CA-4 mandrel adapter
LB-xxB comes with a LB-CA-6 mandrel adapter
LB-xx-SH where ‘-SH’ represents short hose length of 4 inches
LB-15-20D4 is an LB-15 puller with an LB-20 front barrel
LB-xx-4K is designed for the reduced pressure PowerPak (FT-20-4K) with 4,000 maximum psi
The Little Brute has a fail-safe air control system that causes the puller retraction cycle to be interrupted
whenever the operator releases finger pressure on the trigger or in the event of air or hydraulic hose failure. All
puller units operate in conjunction with either of FTI’s PowerPak air-hydraulic power units: the standard
FT-200 or portable FT-20 (and compatible with older units IW100MF and IW10MF). The Little Brute has
proven to be very reliable and requires minimal maintenance.
1.2 GENERAL DESCRIPTION
NOTE: Specifications are the same for all Little Brute pullers LB-10 through LB-35.
Hydraulic Fluid Requirements...................... U.S. MIL-SPEC #5606
Operating Hydraulic Pressure....................... 10,000 psi (68.95MPa)
Pull Force Capacity....................................... 8,000 pounds (35,584N)
PowerPak Air Line Requirements ................ 3/8 inch to 1/2 inch (9.53 to 12.70 mm) ID (FT-200)
PowerPak Air Flow Requirements ............... 90 to 120 psi (0.621 to 0.827MPa), 50 cfm (1.42m3/min) (FT-200)
Actuation....................................................... Pneumatic
Operation ...................................................... Hydraulic
Compatible PowerPaks................................. FT-200 or FT-20
Fail-Safe........................................................ Air logic safety circuit halts mandrel retraction when trigger is
released
Replacement Seal Kit.................................... LB Seal Kit (LB-SK)

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
257429 – Rev L
1.3 GENERAL SPECIFICATIONS
The LB-20 Puller Unit is the preferred model by most customers since material stack-ups rarely exceed 2 inches
(50.8 mm) in the applicable diameter range.
Nosecap Selection: The Little Brute is compatible with both the standard nosecap and the flush nosecap. See
FTI’s comprehensive Tooling Catalog for more information.
Mandrel Selection: The Little Brute is directly compatible with standard Type 1, 7/16-20 threaded mandrels.
The LB may also be adapted to tang or pintail mandrels using LB-CA and LB-PC chuck assemblies,
respectively. See FTI’s comprehensive Tooling Catalog for more information.
Figures 1.3-1 and 1.3-2 show the parts and specifications of the Little Brute Puller Unit.
Figure 1.3-1
Little Brute Puller Unit Parts
Housing
Barrel
Handle
Trigger
Hose
Assemblies
Threaded
Adapter
End Cap
Figure 1.3-1
Little Brute Puller Unit Parts

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57429 – Rev L 3
Model
Number
Maximum
Material
Stackup
(inch)
L
(inch)
F
(inch)
Weight
(lb.)
Stroke
(inch)
LB-10
1.0
(25.4 mm)
9.2
(233.7 mm)
4.0
(101.6 mm)
10.75
(47.8N)
2.0
(50.8 mm)
LB-15
1.5
(38.1 mm)
10.2
(259.1 mm)
4.5
(114.3 mm)
11.00
(48.9N)
2.6
(66.0 mm)
LB-20
2.0
(50.8 mm)
11.2
(284.5 mm)
5.0
(127.0 mm)
11.25
(50.0N)
3.1
(78.7 mm)
LB-20-FVC
2.0
(50.8 mm)
11.2
(284.5 mm)
5.0
(127.0 mm)
11.25
(50.0N)
3.1
(78.7 mm)
LB-20-FVS
2.0
(50.8 mm)
11.2
(284.5 mm)
5.0
(127.0 mm)
11.25
(50.0N)
3.1
(78.7 mm)
LB-25
2.5
(63.5 mm)
12.2
(309.9 mm)
5.5
(139.7 mm)
11.50
(51.2N)
3.6
(91.4 mm)
LB-30
3.0
(76.2 mm)
13.2
(335.3 mm)
6.0
(152.4 mm)
11.75
(52.3N)
4.1
(104.1 mm)
LB-35
3.5
(88.9 mm)
14.2
(360.7 mm)
6.5
(165.1 mm)
12.00
(53.4N)
4.6
(116.8 mm)
Figure 1.3-2
Little Brute Specifications
L (ref)
F (ref)
1.5

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
457429 – Rev L
SECTION 2.0: SAFETY
When used in accordance with these instructions, the puller unit is safe and easy to use. All general safety
precautions associated with hydraulic and pneumatically operated power tools should be observed. Many of these
are noted in this section.
Ultimately, operators are responsible for their own safety; however, the following general safety precautions should
be observed.
1. Wear eye protection when operating the puller unit. Safety stickers are shown in Figure 2.0-1.
Read manual before using Always wear eye protection Always wear ear protection
Figure 2.0-1
Safety Stickers
2. Disconnect the air supply when:
- Maintenance is to be performed
- Hydraulic hose is disconnected
- PowerPak is not in use
3. In the event of a ruptured or leaking hydraulic hose,
IMMEDIATELY RELEASE THE TRIGGER AND
DISCONNECT THE AIR LINE at the air coupler from the
PowerPak (see Figure 2.0-2). Never use your hands to grasp a
leaking hose under pressure. The force of escaping hydraulic
fluid could cause serious injury.
4. Keep hands away from the nosecap assembly when actuating the
puller unit.
5. Release the puller unit trigger when the mandrel clears the
workpiece or becomes
stuck.
6. The end cap must always be in place while in use. Injury may occur if the end cap is removed during
operation. All new Little Brute Puller Units have been modified to ensure operator safety. However, rework
instructions are available from FTI for any Little Brute Puller Units that do not have a roll pin and air seal
adapter (shown in Figure 6.4-1).
Figure 2.0-2
Location of Air Disconnect

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57429 – Rev L 5
7. Before operating the pump, tighten all hose connections using the proper tools. Do not over tighten the
connections. Connections need only be tightened securely and leak-free. Over tightening may cause
premature thread failure or high-pressure fittings to split at pressures lower than their rated capacities.
8. Operators must read this manual in its entirety before using the Little Brute. Eye and ear protection must be
worn while operating the Little Brute. Three safety stickers on the Little Brute act as a reminder to these
instructions. The symbols are defined in Figure 2.0-1.
9. Do not use in potentially explosive atmospheres.
Hydraulic Hose Safety
10. Inspect hydraulic hose for signs of wear (cuts, abrasions, or kinks) to the outer shell material. Pump clean oil
through the entire length. Pressurize the hose and check for leaks at the crimped connectors, between the hose
material and the fitting, and between the fitting and the coupler.
11. DO NOT attempt to disconnect the hydraulic hose while it is under pressure.
12. DO NOT expose hoses to potential hazards such as extreme heat or cold, sharp surfaces, or heavy impact.
13. DO NOT allow hoses to kink, twist, curl, or bend so tightly that the oil flow within the hose is blocked or
reduced. Periodically inspect the hose for wear or damage that could cause premature failure of the hose and
possibly result in injury. Damaged hoses must be replaced immediately.
14. DO NOT use the hose to move attached equipment.
15. DO NOT remove strain reliever from hoses.
16. Hose strain relievers must be placed around hose fittings during use. Hoses with damaged strain relievers must
be replaced immediately.
17. Hose material and coupler seals must be compatible with hydraulic fluid that meets the requirements of
US MIL-SPEC #5606.
18. Hoses must not come in contact with toxic materials such as creosote-impregnated objects and some paints.
Keep couplers and hoses clean and free of paint. Hose deterioration due to chemical degradation may cause
the hose to fail under pressure. Damaged hoses must be replaced immediately.
19. Before operating pump, make sure all hose connections are tightened securely. DO NOT over tighten.
20. If hoses require replacement, contact FTI’s Sales Department.
IMPORTANT: FTI completed a risk assessment on this unit at our factory. Any modifications done by a
third party or the final user are excluded from that risk assessment. As a result, modifications done by a
third party or the final user nullify the CE marking.

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
657429 – Rev L
SECTION 3.0: PULLER UNIT OPERATING INSTRUCTIONS
Become familiar with these instructions before operating the puller.
3.1 PULLER UNIT SETUP PROCEDURE AND OPERATION
Refer to Section 6 (Illustrated Parts Breakdown) for parts identification.
1. Inspect all threads and fittings for signs of wear or damage and replace them if necessary.
2. Install the appropriate mandrel in the threaded adapter. Install the proper chuck assembly in place of the
threaded adapter if a tang or pintail mandrel is to be used.
3. Install the appropriate nosecap assembly over the mandrel and thread it into place.
4. Uncoil the hose assembly of the puller unit and inspect all threads, couplings, and hoses for damage and
degradation. Any damaged component must be replaced immediately.
5. Remove thread protectors from the hydraulic fittings and thread the hydraulic hose fitting from the puller
unit (male) onto the hydraulic fitting of the FTI PowerPak (female). Wipe fittings clean prior to connecting.
6. Thread couplers completely together. There should be positive contact (no space) between the PowerPak
coupler and the hose fitting flange. See Section 5, Problem 2 for more information. Failure to completely
tighten the coupler will cause the puller piston to become stuck in the retracted position. Strain relievers
must be placed on hose fittings during operation. If strain relievers are worn or damaged, they must be
replaced immediately.
7. Connect the male/female air quick disconnects from the puller unit to the FTI PowerPak.
8. Test shop air to ensure that the air is clean, dry, and between 90 and 120 psi (0.621 and 0.827MPa) at
50 cfm (1.42m3/min).
9. Connect the female quick disconnect of a 1/2-inch (12.7 mm) ID shop air line onto the male air inlet of the
PowerPak.
3.2 ACTIVATION OF PULLER UNIT
1. The puller unit can be activated only when connected to an FTI PowerPak.
2. Activate the puller unit by depressing the trigger on the handle. Hydraulic pressure is transmitted through
the hose to the cylinder of the puller, which then retracts the hydraulic piston that performs the cold
expansion procedure.
3. Releasing the trigger changes pressure at the pilot valve and stops the pull cycle. Air pressure returns the
puller to original position.
4. If the puller fails to operate as detailed above, refer to Section 5 (Troubleshooting).

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L 7
SECTION 4.0: PULLER UNIT MAINTENANCE
The puller requires routine checking and periodic preventative maintenance to ensure safe, trouble-free operation.
No special maintenance is required. The following maintenance actions are suggested.
CAUTION: Before attempting any maintenance operations on the puller unit, disconnect the PowerPak from the
air supply or disconnect the puller from the PowerPak or hand pump.
4.1 GENERAL CLEANING
1. Periodically clean the outer surfaces of the puller unit and PowerPak.
2. When not in use, ensure thread protectors are re-installed.
3. Keep all hose connections free of dirt and grime. Doing so will dramatically extend the life of pumps and
puller seals.
4.2 LUBRICATION
1. There is no internal lubrication requirement for the puller unit.
2. Whenever the puller is to be stored for any length of time, maintain a thin coat of 10-weight oil on the
outside of black oxide surfaces.
4.3 INSPECTION
1. Periodically inspect threaded fittings, hoses, and strain relievers for cracks, leaks or other damage. Repair
and replace immediately.
4.4 DISASSEMBLY
Refer to Section 6.4 for parts lists unless otherwise noted. For Little Brute Puller Units below Serial #406,
Step 7 will not be possible since the air seal adapter is adhered to the piston rod. These two parts and the
required seals are referred to as the piston rod assembly.
1. Unthread and remove the nosecap assembly.
2. Unthread and remove the mandrel from the threaded adapter (8).
3. Loosen the lockring (10) to remove tension from the end cap (9).
4. Unthread and remove the end cap (9).
5. Unscrew and remove the barrel (4) from the housing (2).
6. Unthread and remove the threaded adapter (8) or chuck assembly if so equipped; use the flats on the back of
the threaded adapter (8) and mating air seal adapter (7).
7. Remove the spring pin (26) (if present, see Figure 6.4-1). Unthread and remove the air seal adapter (7).

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857429 – Rev L
NOTE: Since it is necessary to hold the piston rod stationary to remove the threaded adapter (10), use a
screwdriver in the slot (some models may have a hex wrench hole) in the back end of the piston to
keep the piston rod from turning. DO NOT scratch the piston shaft during disassembly.
8. Remove the piston rod assembly (3, Figure 6.4-1) by pushing on the threaded end (nosecap end) of the
piston rod until threads engage the sleeve (5, Figure 6.4-1). Thread the piston rod threads through the
sleeve (5, Figure 6.4-1) and remove the piston rod assembly from the unit.
9. Using the pin wrench supplied, remove the sleeve retainer (6, Figure 6.4-1).
10. Remove the brass sleeve (5, Figure 6.4-1).
11. Remove the handle assembly (11, Figure 6.4-1) by removing the four hex-head bolts.
Normal replacement of seals requires the use of Little Brute Seal Kit (LB-SK). Refer to Section 6.2.
12. Remove and replace the O-ring on the top face of the handle (4, Figure 6.2-1).
13. Remove the hydraulic adapter (6, Figure 6.1-1); replace the O-rings (3, Figure 6.2-1) and backup rings (2,
Figure 6.2-1).
14. Replace the hydraulic adapter (6, Figure 6.1-1) in the handle (11, Figure 6.4-1).
15. Remove and replace the O-ring (6, Figure 6.2-1) and backup ring (7, Figure 6.2-1) on the outside diameter
of the sleeve (5, Figure 6.4-1).
16. Remove and replace the O-ring (8, Figure 6.2-1) and backup ring (9, Figure 6.2-1) on the inside diameter of
the sleeve.
17. Replace the omni seal (10, Figure 6.2-1) on the air seal adapter (1, Figure 6.1-1).
18. Remove and replace the O-ring (6, Figure 6.2-1) and backup ring (7, Figure 6.2-1) on the piston rod
assembly.
19. Remove and replace the O-ring (5, Figure 6.2-1) on the barrel.

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57429 – Rev L 9
4.5 RE-ASSEMBLY
Refer to Section 6.0 for parts lists. All numbers below refer to location numbers in Figure 6.4-1.
IMPORTANT: 1. Thoroughly clean all parts prior to reassembly.
2. Check to see if O-rings are installed toward the hydraulic flow with Teflon backup rings
behind.
1. Place the sleeve (5) into front of housing (2) as shown (note the orientation).
2. Replace the puller unit sleeve retainer (6) and tighten until snug.
3. Install the piston assembly (3) into the housing (2) by gently threading the piston through the sleeve (5).
Then push the piston (3) to the full forward position. Lubricating the piston rod and threads with hydraulic
oil will help prevent damage to the sleeve seals.
4. Install the handle assembly (11) with hydraulic adapter onto the housing (2) using four hex-head bolts. The
Teflon backup rings (2, Figure 6.2-1) may be partially sheared off during the installation process. Remove
the bolts and handle assembly to remove any Teflon material sheared off during the installation process. Re-
install the handle assembly (11) onto the housing (2) using four hex-head bolts.
5. Install the air seal adapter (7) on the piston rod assembly (3). Install the spring pin (26) if present.
6. Install the threaded adapter (8) or chuck assembly.
7. Reassemble the barrel (4) to the housing (2).
8. Install the end cap (9) and tighten the lockring (10).
9. Select the appropriate mandrel/nosecap combination and install.

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10 57429 – Rev L
SECTION 5.0: TROUBLESHOOTING
This section provides solutions to some basic trouble spots. If you cannot solve your operational problems with the
information provided in this section, please contact your nearest FTI representative.
NOTE: Should difficulties originate in the PowerPak, consult the specific PowerPak Operations, Maintenance
and Repair Manual. Remember, always disconnect the PowerPak main air supply before performing any
repair or maintenance.
PROBLEM
CAUSE
SOLUTION
1. PowerPak will not build full
hydraulic pressure.
(a) The hydraulic pressure valve
has not been properly adjusted.
(a) Refer to Problem 4 for
resolution.
(b) One or more of the key air or
hydraulic lines has not been
securely connected.
(b) Check the following hose
connections:
(1) Main air line quick
disconnect fitting from
shop air system to
PowerPak.
(2) Hydraulic quick couplings
connecting the hoses to the
PowerPak manifold and
the puller to the hydraulic
hoses. See Figures 5.0-1
and 5.0-2.
(3) Two male/female air line
quick disconnect fittings
connecting the puller to the
PowerPak manifold.
(c) Inadequate external pressure.
(d) Inadequate air pressure.
(c) On FT-200, adjust external
pressure regulator.
(d) Check the main air supply has
not been interrupted and meets
minimum flow requirements
(90 psi (.621MPa), 50 cfm
(1.42m
3
/min)).
CAUTION:
Hydraulic oil under extreme pressure may cause serious injuries if not handled carefully. For
technical assistance, please contact FTI’s Sales Department.
Main
Air Input
Puller Unit Air
Hose Couplers
Puller Unit
Hydraulic
Hose Coupler
Trigger
Response Valve
Puller Unit Air
Hose Couplers
Puller Unit Hydraulic
Hose Couplers
Figure 5.0-1 Figure 5.0-2
FT-20 PowerPak FT-200 PowerPak

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57429 – Rev L 11
PROBLEM
CAUSE
SOLUTION
2. Puller retracts on first trigger
actuation but will not return to
start position. The hydraulic
hose is difficult to bend or coil
(indicating unrelieved pressure
built up in the hose).
(a) The hydraulic quick coupler
line has not been completely
tightened at the PowerPak
manifold (there should be no
space between the PowerPak
coupler and the hose fitting
flange). See Figure 5.0-3.
(a) Once hydraulic pressure has
been introduced to the
hydraulic hose, the pressure
must be relieved before the
coupler can be sufficiently
tightened.
Figure 5.0-3
Hydraulic Quick Coupler
Puller Unit
Hydraulic Hose
Couplers
Procedure for relieving
hydraulic pressure:
(1) Disconnect the main air
supply.
(2) Disconnect coupler from
PowerPak. See Figures
5.0-4 and 5.0-5 for the
locations of the hose
couplers.
(3) Connect Enerpac CT-604
to the coupler and bleed
off hydraulic oil to relieve
the built-up pressure.
Figure 5.0-6 shows the
Enerpac CT-604 Pressure
Relief Tool.
(4) Once pressure is relieved,
coupler may be tightened
and reinstalled onto
PowerPak.
(5) Reattach air lines to get
puller to return.
(6) Check oil level in
PowerPak Reservoir.
Figure 5.0-4
Location of Hydraulic Quick Coupler (FT-200)
Hydraulic Quick
Coupler
Figure 5.0-5
Location of Hydraulic Quick Coupler (FT-20)
PowerPak Coupler
Hose Fitting Flange
No Space
Hydraulic Quick
Coupler Line
Figure 5.0-6
Enerpac CT-604
Pressure Relief Tool

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
12 57429 – Rev L
PROBLEM
CAUSE
SOLUTION
3. PowerPak will not generate
constant pressure (or hiccups).
(a) Trigger response valve
requires adjustment. Figure
5.0-7 shows the trigger
response valves.
***(For pullers with a cartridge
trigger assembly (see Section 6.2),
the trigger response valve should be
closed.)***
(a) Adjustment procedure:
(1) Loosen locknut on trigger
response valve.
(2) Using a screwdriver, open
screw counterclockwise
until PowerPak will not
start when puller trigger is
depressed.
Trigger Response Valve
Trigger Response Valve
(3) Turn screw clockwise until:
- PowerPak generates
constant pressure when
puller trigger is depressed,
and
- PowerPak starts instantly
when puller trigger is
depressed and stops
instantly when released.
When the puller trigger is
depressed, the PowerPak
should be run at the pre-set
pressure until the trigger is
released.
(4) Hold set screw in position
and tighten locknut until
snug.
4. PowerPak will not operate or
maintain sufficient pressure
(6,000 psi (41.37MPa).)
(a) Hydraulic pressure requires
adjusting (applicable to
FTI-200 PowerPak only).
(a) Adjust PowerPak pressure valve:
(1) Squeeze trigger on puller unit
to activate PowerPak.
(2) If pressure does not reach
6,000 psi (41.37MPa), loosen
lockring and turn hydraulic
pressure control clockwise
until pressure reaches 6,000
psi (41.37MPa).
(3) Tighten lockring to secure
available shop air.
Figure 5.0-7
Trigger Response Valves

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L 13
PROBLEM
CAUSE
SOLUTION
b)
5. Threaded adapter/chuck
assembly will not unthread
from piston assembly.
(a) Torque required to unthread
threaded adapter/chuck
assembly is high enough to
spin the piston assembly.
(a) See disassembly procedures in
Section 4.4-6 (use flats on back of
threaded adapter and mating air
seal adapter).
(b) Inadequate air supply.
6
0
0
0
Figure 5.0-8
Pressure Gage (FT-200)
(b) Increase pressure or flow of
available shop air.
- If PowerPak will not generate or
maintain sufficient pressure, the
main air line pressure is too low
or the PowerPak hydraulic
pressure requires adjustment.
- Air pressure requirements:
1/2-inch (12.7mm) ID air line
with 90 to 120 psi (.621 to
.827MPa) for the FT-200.
3/8-inch (9.525mm) ID air line
with 90 to 120 psi (.621 to
.827MPa) for the FT-20.
- Flow requirements:
40-50 cfm (1.13-1.42m3/min) for
the FT-200.
20 cfm (.57m3/min) for the
FT-20.
6. The mandrel sticks in the hole
when the puller is activated.
(a) Not enough pressure used to
generate pull forces.
(a) Use the following procedure to
analyze the problem:
(1) Actuate the puller and observe
pressure reading on PowerPak
pressure gage (FT-200
PowerPak only, Figure 5.0-8).
(2) Pressure gage should read
6,000 psi (41.37MPa). (Note:
FT-20 PowerPak is factory set
at 10,000 psi (68.95MPa).) If
any increase in pressure is
required, refer to the solution
for Problem 4 in this section
for instructions.
(3) Actuate puller again. If
mandrel remains stuck,
increase pressure to 10,000 psi
(68.95 MPa).
(4) If mandrel remains stuck at
10,000 psi (68.95MPa),
disengage the mandrel from
the puller. Push the mandrel
out. Contact FTI’s Sales
Department for additional
assistance.

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
14 57429 – Rev L
SECTION 6.0: ILLUSTRATED PARTS BREAKDOWN
Fatigue Technology has redesigned the trigger assembly for Little Brute Series Puller Units. All Little Brute Puller
Units with serial numbers equal to or greater than the serial numbers in Table 6.0-1 have the new cartridge trigger
assembly. The new design will reduce the occurrence of trigger air leaks, perform more reliably (better pump
actuation), and be easier to maintain.
The previous trigger design detailed in Section 6.3 can be easily replaced with this improved trigger assembly
detailed in Section 6.1. Two part numbers are needed for replacement:
•Either the Cartridge Trigger Assembly Kit (FTI-CT-RK) or the Little Brute Rework Kit (LB-CT-RK) (see kit
differences in Section 6.1), and
•Puller Trigger Rework Tool Kit (FTI-CT-RKT).
One FTI-CT-RK or LB-CT-RK kit is required for each puller converted. Only one FTI-CT-RKT is required
regardless of the number of pullers converted. The FTI-CT-RKT kit includes the tools (punch, tap, etc.) required
and detailed instructions on how to perform the modification.
Table 6.0-1
Trigger Assembly Conversion
FTI Model Number FTI Part Numbers FTI Serial Number
LB-10
2327-001, 2885-001, 2305-001, 2305-013,
2885-013, 2305-007, 2307-020, 2885-007
0707
LB-15
2305-002, 2305-008, 2885-014, 2885-002,
2885-019, 2305-019, 2305-014, 2885-008
FTI-424
LB-20
2885-015, 2885-003, 2885-009, 2305-009,
2305-003, 2305-021, 2305-015
3109
LB-25
2885-010, 2885-016, 2305-004, 2305-010,
2305-016, 2885-004
0424
LB-30
2305-022, 2305-017, 2885-017, 2305-011,
2305-005, 2885-011, 2885-005
0713
LB-35
2885-006, 2305-018, 2885-018, 2305-012,
2305-006, 2305-023, 2885-012
2057
LB-20-AT 2785-003 1091
LB-30-AT 2785-005 0508
LB-35-AT 2785-006 0427

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
57429 – Rev L 15
6.1 LITTLE BRUTE REWORK KIT; PARTS LIST AND DIAGRAM
All Little Brute Puller Units with serial numbers equal to or higher than the serial numbers in Table 6.0-1 have a
cartridge trigger assembly, as shown in Figure 6.1-1. This trigger configuration can be readily identified by the
brass pushbutton (the previous trigger assembly is identified by an aluminum pushbutton - see Section 6.3).
A diagram of the Little Brute Puller Unit is shown in Figure 6.1-1, with parts for the Rework Kit corresponding
to Table 6.1-1.
Table 6.1-1
Parts List for Little Brute Rework Kit
Piece Number
Quantity
Description
Part Number
Included in Kit
1
1
Adapter, LB Air Seal (seal and fitting)
2339-001
LB-CT-RK
2
4
Screw, SHC (8-32UNCX 3/8)
1026-002
LB-CT-RK
3
1
Pushbutton, Brass
1187-623
LB-CT-RK and FTI-CT-RK
4
1
Retaining Ring, Internal
1187-624
LB-CT-RK and FTI-CT-RK
5
1
Sleeve, Puller Handle Trigger
3196-001
LB-CT-RK and FTI-CT-RK
6
1
Adapter, LB Hydraulic
2039-001
LB-CT-RK
7
1
Valve, Cartridge Trigger
1187-622
LB-CT-RK and FTI-CT-RK
8
1
O-Ring
1046-012
LB-CT-RK
See Section 6.2
1
Kit, LB Seal (LB-SK)
8000-484
LB-CT-RK
Figure 6.1-1
Diagram of Little Brute Rework Kit Parts (LB-CT-RK)
7
8

Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: [phone] Fax: [phone]
16 57429 – Rev L
6.2 LITTLE BRUTE SEAL KIT; PARTS LIST AND DIAGRAM
All Little Brute Puller Units with serial numbers less than the serial numbers on Table 6.0-1 will use Piece
Number 2 to replace the seal in the trigger assembly (see Section 6.3). A diagram of the Little Brute Puller Unit
is shown in Figure 6.2-1, with parts for the seal kit corresponding to Table 6.2-1.
Table 6.2-1
Little Brute Seal Kit (LB-SK)
Piece Number
Description
Part Number
Quantity
1
Valve, Cartridge Trigger
1187-622
1
See Section 6.3, pc. 2
Seal, LB Handle
2040-001
1
2
Ring, Backup
1046-044
2
3
O-Ring
1046-045
2
4
O-Ring
1046-012
1
5
O-Ring
1046-016
1
6
O-Ring
1046-002
2
7
Ring, Backup
1046-003
2
8
O-Ring
1046-014
1
9
Ring, Backup
1046-015
1
10
Seal, Omni
1046-017
1
11
O-Ring
1046-112
1
Figure 6.2-1
Diagram of Little Brute Assembly (LB-SK)