Bolts & Pins
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LiftMaster K75-39337 LA500 Trolley Nut Kit
LiftMaster has created the K75-39337, Trolley Service Kit with all the necessary parts and provides instructions on how to replace a damaged travel nut within an LA500 arm. LiftMaster advises the travel nut replacement to be conducted in a controlled environment such as on a bench in a workshop, due to its complexity and the opportunity of dirt/debris being trapped within the transmission of the arm.liftmaster:k7539337