Maintenance of Dry Organic Fertilizer Mixer Machine of Tobacco Agriculture

The purpose of this study was to make a preventive maintenance plan for the dry organic fertilizer mixing machine for tobacco farming with the Inspection, Small repair, Medium repair, Overhaul which is called ISMO method. The steps of the study carried out were data collection by observation and literature studies, then component identification, maintenance schedules, maintenance procedure plans and expert validation. The results of the study are the preventive maintenance schedule for the mixer machine consisting of a monthly schedule and an annual schedule using the ISMO method. The total time required for inspection maintenance activities is 240 minutes, small repair is 210 minutes, and medium repair is 20 minutes. Based on the validation results, the maintenance schedule has been feasible to be applied to a dry organic fertilizer mixer machine for tobacco farming and total maintenance time used along a year are inspection 240 minutes, small repair 214 minutes and medium repair as 20 minutes.


INTRODUCTION
In agriculture, organic fertilizers are needed for the growth process of plants to be cultivated.Organic fertilizer is made from the Tobacco farmers in Subang regency are still experiencing difficulties in the processing of organic fertilizers because the process of mixing the ingredients is still stirred manually using a hoe and tarpaulin.This process takes a long time and is exhausting to get good result.
Along with advances in appropriate technology, many farmers' tools are found that aim to ease the work.Based on the description above, in the process of mixing organic fertilizers, a machine that can work optimally and efficiently is needed, such as a mixer, this mixer machine is useful for mixing organic fertilizer ingredients.
Maintenance is an activity to maintain and protect existing facilities as well as In the use of an organic fertilizer mixer machine, it is necessary to carry out preventive maintenance to maintaining the quality of production that also increases the life of the machine.ISMO method is usually done when engine performance begins to decline, the history of the machine is limited and lack of information from the machine manual [13].Therefore, a maintenance schedule and procedures or work steps are made to carry out maintenance according to the ISMO method (Inspection, Small Repair, Medium Repair and Overhaul) on the organic fertilizer mixer machine dry farming to maintain the quality of machine production and also increase service life or minimize major damage that will occur to the machine.
The aim of this study was to make preventive maintenance using inspection, small repair, medium repair and overhaul or ISMO method for the dry organic fertilizer mixer machine of tobacco agriculture.

RESEARCH METHOD
The farmers with planting locations in several areas including Dusun Pasir Malang, Hamlet Cupunagara, Hamlet Gandasoli, Hamlet Panyongsong, Hamlet Sukakerti Cisalak, and Hamlet Kata Jaya.
Subang State Polytechnic, along January 2021 -July 2021.The stages of this study consisted of data collection techniques through observation and literature study, then component identification, writing maintenance schedule using the ISMO method which is one of preventive maintenance according to schedule consist of Inspection, Small repair, medium repair, and Overhaul.The next step was validation the schedule by experts.The validated schedule was implemented and the results of the schedule implementation were Volume 6, Number 2, November 2021 ISSN 2528-2611, e-ISSN 2528-2700 analyzed descriptively.The stages of the research can be seen in Figure 1.

Figure
Figure 1.Flowchart of mixer machine action after an inspection is carried out in the form of repairing the components on the Tobacco Farming Dry Organic Fertilizer Mixer Machine due to damage or wear found during the inspection.This action is carried out periodically according to the schedule with the aim of restoring the function of components that are damaged or worn so that they can work again according to their functions and do not hinder the operation process.Small repairs (S) carried out on the frame when the welding connection has problems, small repairs (S) on the blades when the welding connection is problematic, small repairs (S) on the drive system component of the reducer component oil filling routinely according to the maintenance schedule, small repairs on the driving motor parts such as filling gasoline and oil according to a predetermined maintenance schedule [15].

Table 1 .
Component list

Table 2 .
Inspection maintenance time

Table 5 .
Below is a Monthly period

Table 5 .
Monthly period maintenance schedule January-December

Table 6 .
Monthly period maintenance schedule January-December

Table 7 .
Monthly period maintenance schedule January-December