PAST
The method of disposal and installation of components on heavy machinery in the early days is still very simple. At that time the special equipment used or the standard procedure is still very little. “The purpose of removing and installing components is to remove components as quickly as possible, repair them as needed and reinstall them for use again.” The main component discharge and installation equipment consists of open end wrenches, hammers and lever rods and chains.
The importance of hygiene factors in the process of repairing heavy equipment rarely gets attention. Determining and repairing the cause of the damage is an unfamiliar concept. Refine instructions and procedures are provided briefly and simply.
Major improvements are often done without unpacking components from the machine. The advance repair manual contains explanations of service procedures performed under ideal conditions of the day. So the severity of the contamination and the actual damage of the repair can not be known for sure.
Figure 3.1 Ancient machines
In the late 1950s, machine tools and repair procedures were far more complex and sophisticated. Rapidly advanced machine technology makes guidebooks, training and equipment more qualified. With this advancement, the more complex components can be repaired quickly and effectively. However, the main focus remains on how to make repairs as quickly as possible to minimize the time and so the machine can be operated again.
Attempts to fix components of disposal and installation, finding sources of component malfunction or extending service life are not getting much attention.
Figure 3.2 A more modern machine
PRESENT TIME
The mining industry plays a major role in changing the focus of machine repairs, from reduced rest periods to reducing operating costs. A reduction in production costs is a necessary step in order to survive in a tightly competitive business.
Since production machinery is the largest component of capital investment, its utilization must be maximized and cost per ton must be suppressed. The availability of machines is an important factor that determines performance, but the important thing is to manage the main component life cycle cost so that the cost per ton can be optimal.