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Instructions for replacing a single torsion spring, for replacing garage door extension Replace Springs Standard Garage Door Torsion Springs Assembly. Obviously, these instructions are designed specifically for their own doors. But if you Torsion springs can be very dangerous if they are improperly installed or TORSION SPRINGS. Installation Instructions and Owner's Manual Supplement for Models 5120/5145/9100/9405. NOTE: Use this supplement in conjunction Supplemental Instructions. Torsion Spring Installation. This is a supplement to the Residential Garage Door. Instructions (referred to as the MANUAL). It covers. 10 Jun 2014 for industrial sectional doors with torsion springs . specified or other parts not described in this manual is the responsibility of the end producers of the garage.The installation of a garage door is a considerable job which requires . For torsion springs, always use a solid steel rod of 1?2” X 18” (12 X 457 mm) to. Step-by-step instructions for installing a single torsion spring, shaft, bearing plates, cables and cable drums on a garage door. 29 Aug 2012 3 Dec 2009