Usage:
In the future all new measuring and diagnostic tools will be available in metric (Systeme Internationale) units only. All existing measuring and diagnostic tools will be replaced by metric tools gradually as current parts stock is depleted and new stock reordered. Some of the service tools affected by this change are gauges, micrometers, hydraulic flow meters, engine pressure groups and test benches. See Illustrations 1 and 2. Total changeover may require from five to seven years.
The change to metric tools is the latest step in Caterpillar's commitment to adopt the metric system. The conversion has been gradual. The first step was to establish the ability to use both measurement systems. Support literature published specifications in non-metric units first with the metric equivalent following in parentheses. That sequence was later reversed. This provision for "dual capability" allows use of either measuring system during service work. Service Publications will continue to furnish specifications in both systems.
Illustration 1. Example of a metric gauge.
Illustration 2. Metric Dial Indicator.
Dual capability also allows design and manufacturing to replace equipment and machinery gradually as new products and new facilities dictate. This process of evolution has now reached the point where new products and service tools are designed either entirely or primarily in metric units of measure.
Any change brings questions. The following information summarizes several concerns about the use of metric measuring and diagnostic tools.
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- 1. Won't use of these new tools require making a lot of conversions?
On the contrary, because Caterpillar publications already list all specifications in metric units, the need for conversions will almost be eliminated. A serviceman can simply compare the measurement on the tool with the metric specification given in the literature. Of course, conversions will be necessary in a few situations, for instance, if a serviceman is using a very old Service Manual or a Service Magazine article published prior to the use of metric units.
For these circumstances, conversion tables will be made available. A conversion calculator is another readily available and relatively inexpensive method of converting metric units to non-metric units or vice versa. Only the number to be converted and the function need to be entered. The calculator makes the conversion automatically.
- 2. Won't using metric-only tools be confusing?
No. In fact, use of metric-only instead of dual scaling on gauges can help prevent the possibility of reading the wrong number. As tools are replaced, the metric-only tools will gradually eliminate the confusing variety of non-metric only, dual scaling and metric-only combinations now occurring, even within a single tool group.
- 3. Will I have to buy all new tools?
No. The adoption of metric units for measuring and diagnostic tools does not make any existing dealer tools obsolete. Simply replace tools as they become broken or worn as you normally would.
- 4. What about hand tools and fasteners like nuts and bolts?
- 1. Won't use of these new tools require making a lot of conversions?
No changes will be made to hand tools or fasteners. Caterpillar will continue to use unified-inch fasteners. Servicemen will not need to purchase new hand tools.