Original Date: 04/07/1997
Revision Date: 04/14/2003
Information : Contact Maintenance Truck Humvee
The Contact Maintenance Truck Humvee (CMTH) project was initiated to provide a heavy duty maintenance ground vehicle to perform assorted repairs in the field. The vehicle itself is the High Mobility Multipurpose Wheeled Vehicle, referred to as a Humvee. This now famous military vehicle is stronger and durable for rough terrain travel, and provides greater safe clearance over ground obstacles than other trucks. The Humvee’s strength allows for larger shell design which in turn, allows for greater equipment carrying capacity. The configuration provides Army field personnel with the necessary tools and other equipment to perform on-the-spot field repairs. A number of innovative improvements have been implemented for this configuration:
The truck tool box locking system is now more efficient by the elimination of four hardware pieces, and by the use of the new locking system which is uniform to all tool boxes carried by the truck, allowing for significant savings in fabrication and installation times.
The roll-up door locking system was modified to eliminate right and left handed parts with replacement by a universal part assembly; fabrication and installation time was reduced by 0.8 hours.
All hardware is now in accordance with the Society of Automotive Engineers’ standards vice Government specifications; this allows for hardware interchangeability with less inventory required.
Door seals, which were separately installed items, were converted to subassemblies; a local supplier now provides these items.
The overly sophisticated air compressor was replaced with one which requires no holding tank, is lighter, uses less power, and takes up less space; it also requires less wiring and piping so that installation is simpler and less time consuming.
An off-the-shelf toolbox which required modification and repainting was changed to one which met requirements with a corresponding saving of installation time of four hours per vehicle.
Tool preservation was reduced to minimal levels eliminating a cleaning requirement prior to shipment and reducing premature tool corrosion.
Process improvements include: Shop orders (work instructions) are now issued for the entire CMTH process which provide written detailed instructions and measurable standards for each individual work operation.
Each work operation is subject to inspection which is documented to ensure proper installation and function.
Employee empowerment is established through teaming, with each team member responsible for individual quality assurance through the new inspection process.
Computerized parts listings have been established to identify shortages and to more effectively meet monthly quotas.
Many parts are now subassembled rather than requiring separate piece part installation.
These improvements have resulted in less operator downtime due to the inventoried parts system and resultant smooth parts flow; improved parts tracking; greater consistency in truck performance due to application of uniform shop orders; and significant reduction in labor hours required.
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