In case of wear, damage or destruction of the rubber-metal hinges of the lever and extensions, they are pressed out. For pressing out the rear hinge of the extension, mandrels such as screwdrivers are used, and for pressing in, a tubular mandrel with a diameter of 42 and 45 mm (stepped). The hinge of the lever and the front hinge of the extension are pressed out with tools, respectively 67.7823.9535 (∅ 48 mm) and 67.7823.9540 (∅ 45 mm) - pic. 92.
Pic. 92. Pressing rubber-metal hinges from the suspension arm (A) and an extension bracket (b): 1 - fixture bushing; 2 - suspension arm; 3. 6 - rubber-metal hinges; 4, 5 - mandrels; 7 - tool 67.7823.9540
The hinges of the extension are pressed in, and the lever on the press with the same mandrels (pic. 93). At the same time, before pressing in, generously lubricate the hinge sockets and their outer surface with soapy liquid *. This will make it easier to press the hinges and protect them from damage. When pressing the front hinge of the extension into the bracket, install it with the marked part outward.
* Aqueous solution of triethanolamine soap of oleic acid and soap fraction of fatty acids.
Pic. 93. Pressing rubber-metal joints of the suspension arm (A) and an extension bracket (b): 1, 9 - support bushings; 2 - suspension arm; 3 - guide sleeve; 4,7 - rubber-metal hinges; 5, 6 - mandrels; 8 - extension bracket
When assembling the lever with an extension, the removed adjusting washers are installed in place so that the chamfers on them face the thrust end of the extension. Before tightening the brace nuts 1 (pic. 94), install the lever 2 assembly with the extension on a special device; applying force to the extension, set the distance of 10 mm between the axis of the lever and the center of the extension and fix the extension. In this position, tighten the extension nut with a torque of 16.3-18 kgf-m. Then the lever assembly is removed from the device and shims are installed at the other end of the extension, observing the rules for their installation. After that, the bracket is fixed with a nut, tightening it with the moment specified in appendix. 1.
Pic. 94. Stretch suspension arm assembly