Design for Maintainability

Assignment No3 Unit GEG7064

Design for maintainability

The item which has been selected to be examined using the Bretby Maintainability Index is the R2900G Underground Load Haul Dump, commonly described as a “Bogger” which is the underground term for a loader; the particular machines have the operator positioned on the L/H side of the machine facing sideway. They are located on the very L/H side or the machine these machines are industry specific and are manufactured in Burnie Tasmania by Caterpillar Underground Mining Machines. The environment that these machines operate is classed as severe and quite harsh, these machine quite often spend most of their time being operated on remotes as the areas they work in are to dangerous for personnel to enter.

The particular part that I have chosen is the preventative maintenance activities that are carried out on this particular machine, I have used what is in the manufactures guidelines and what is also included in the on-site service checklist that are filled out when the machines receive their daily services, currently there is a push to have the machines fitted with automatic lubrication systems as we have just ordered a new R2900G and it will be fitted with automatic lubrication system.

I hope through the use of this unit I have helped to strengthen the case for the installation of automatic lubrication systems.

No 2. See attached spreadsheet for the examination of the preventative maintenance for R2900G.

Note due to size of spreadsheet it has been attached as a linked file

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Also included in the above spreadsheet is the modifications, suggested changes combined with the benefits, costs, the advantages to be had from having these modifications done and also included is the cost justifications calculated using the BMI index referring to the BMI analysis after and before modification were carried out.

SUMMARY

It is clearly demonstrated that the two biggest savings to be had are the change in...