Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: (206)246-2010 Fax: (206)244-9886
358856-REV K 1
SECTION 1.0: INTRODUCTION
This instruction manual contains information on the operation and maintenance of the Medium Brute 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 the manual for future
reference.
If requested, FTI will provide this manual in the language of the end-user.
1.1 ABOUT THE MEDIUM BRUTE PULLER UNIT
The Medium Brute hydraulic puller unit is a powerful, moderately sized, lightweight tool specifically
designed for use with Fatigue Technology Inc. (FTI) patented Split Sleeve Cold Expansion™ (SsCx™)
process. The Medium Brute is designed to pull a mandrel through a hole with the pre-lubricated stainless
steel split sleeves used in this process. The puller is also compatible with other FTI processes including
ForceMate®, FleXmate®, GromEx®, etc.
Medium Brute (MB) pullers have a maximum pull force of 24,000 pounds (1.1 x 10
5
N) at 10,000 psi (689.5
bar) pump pressure. The MB is available in sizes (models) capable of cold expanding holes up to 7 inches
(177.8 mm) deep, and 15/16-inch (23.8 mm) diameter in aluminum, and up to 3/4-inch (19.1 mm) diameter
in steel and titanium.
Larger diameters may be evaluated on a case by case basis, contact FTI Sales for
application assistance.
The Medium Brute is available in various models to accommodate multiple material stack-ups, hose options,
and mandrel adapters:
MB-xx where ‘-xx’ relates to material stack (see Table 1.3-1).
MB-xx-V where ‘-V’ represents high visibility hoses.
MB-xx-Hxx where ‘-Hxx’ represents a unique hose length other than the standard 10 feet.
MB-xxA comes with a MB-CA-8 mandrel adapter.
MB-xxB comes with a MB-CA-11 mandrel adapter.
BMB-10 is a special puller with a BB barrel and BMB-CA-13 mandrel adapter.
The Medium Brute has a fail-safe air control system that causes the puller retraction cycle to be interrupted
and return the puller unit to its original position whenever the operator releases finger pressure on the trigger
or in the event of an air hose failure. All puller units operate in conjunction with either of FTI’s PowerPak
air-hydraulic power units, the standard FT-200D, FT-200C, or portable FT-20 (and are compatible with older
units FT-200B, IW100MF, and IW10MF). The MB has proven to be very reliable and requires minimal
maintenance.
Use the puller unit only with FTI tooling and accessories. Refer to the FTI Tooling Catalog for more
information or contact the FTI Sales department for assistance.
1.2 GENERAL SPECIFICATIONS
Hydraulic Fluid Requirements ......................................... U.S. MIL-Spec #5606
Stackup Capacity (Grip) ................................................. Material up to 7 inches (177.8 mm)
Actuation / Operation ....................................................... Pneumatic / Hydraulic
Compatible PowerPaks .................................................... FT-200D, FTI-200C or FT-20
Replacement Seal Kit ....................................................... Medium Brute Seal Kit (MB-SK)
Emission sound pressure level at the work station
(according to EN ISO 11201:1995) on load ................. 83.1 dB(A)
Weighted hand-arm vibration at the handle
(according to EN 28662-1:1993) on load ..................... <2.5 m.S
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