Which component assists in the side frame width adjustment of the MHU-83 lift truck?

The correct component that assists in the side frame width adjustment of the MHU-83 lift truck is the offset bracket. The offset bracket plays a critical role in allowing operators to adjust the side frames effectively to accommodate different munitions configurations. This adjustment is essential for stabilizing the load during transport and ensures proper alignment when handling various munitions.

The lift boom, while an integral part of the lift truck for raising and lowering loads, does not specifically assist in adjusting the side frame width. Its primary function is to provide the lifting capability for the truck and does not have a direct role in the configuration of the truck's framework.

In the context of the other components, the extension arm also does not relate directly to the width adjustment of the side frame. It is involved in providing additional reach or support but does not facilitate side frame adjustments. The roller adjustment knob serves a different function as it is typically associated with adjusting the height or positioning of other components but does not influence the width of the side frame.

Therefore, it is clear that the offset bracket is the component specifically designed for the task of adjusting the width of the side frame on the MHU-83 lift truck, making it essential for proper function and operation.