Fatigue Technology Inc. 401 Andover Park East Seattle, WA • USA 98188-7605 Tel: (206)246-2010 Fax: (206)244-9886
358856-REV K 39
APPENDIX A: LEGACY UNITS
Various design changes and improvements have been made to the Medium Brute series. These older units can be
upgraded or refurbished to the new configuration if desired.
A.1 TRIGGER REWORK (FTI-CT-RK AND MB-CT-RK)
FTI has redesigned the puller unit trigger assembly, built with serial number 810 or higher, to a cartridge trigger
assembly. The new design reduces the occurrence of trigger air leaks, performs more reliably (better pump actuation),
and is easier to maintain.
The previous trigger design detailed in Section A.2 can be easily replaced with this improved trigger assembly detailed
in Section A.1. Two part numbers are needed for replacement:
• Either the Cartridge Trigger Assembly Kit (FTI-CT-RK) or the Medium Brute Rework Kit (MB-CT-RK) – (see
kit differences in Table A.1-2 and A.1-3), and
• Puller Trigger Rework Tool Kit (FTI-CT-RKT) – (see kit in Table A.1-1).
One FTI-CT-RK or MB-CT-RK kit is required for each puller unit converted. Only one tool kit (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 A.1-1
FTI-CT-RKT Trigger Assembly Replacement Tool Kit
Hex Head Cap Screw, fully threaded, 3 inches long, 1/2-13UNC
Flat washer, 9/16 inch ID, 1 3/16 inches OD
Metal Tubing, 1.5 inches long, 7/8 inch ID
Hand tap, 1/2 x 13UNC, HSS, Class H2, Plug
Hand punch, piloted, .35 inch pilot dia.
Puller Trigger Replacement Instructions (DM #160918) – not shown
Figure A.1-1
FTI-CT-RKT Tool Kit Pieces
Table A.1-2
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