- Caterpillar Products
This Special Instruction describes the basic outline of a Visualization Service Procedure (VSP). The Special Instruction explains the use and layout of graphics contained within one of these VSP Publications.
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Service graphics are used to identify component locations and points of repair. In a VSP primary service step, action steps are communicated using one or more graphic symbols.
Reference: Refer to Special Instruction, M0066576, "Visual Service Procedures: Colors and Symbols" for a list of the graphic colors and symbols used.
Graphic Color Description
Color-coding of targeted components, or sections of a part, is used to communicate a required action.
This table shows the different colors and what is represented when used in a graphic.
Note: Magenta is not to be used for hose ends. Hoses should be colored either all blue or yellow depending upon the action being applied to the hose assembly.
(Blue) The primary component of focus for a particular step. Target or primary component to be installed or removed. Installation implied unless otherwise noted with a symbol.
(CAT® Yellow) Description of parts.
(Yellow) Components placed aside for access, but not removed. Highlighted areas of adjustment, inspection, or special attention.
(Cyan) Special tools or other equipment required for use in a particular step.
(Light Gray) Components used for reference.
(Magenta) Any fastener, retainer, or electrical connector used to install or remove the primary component.
Graphic Symbol Description
This section includes all the symbol graphics used throughout the VSP, along with a brief description of what the symbol represents. The symbols will be listed in alphabetical order for ease of navigation. For example:
Clean - To remove foreign or undesired material.
Loosen - To make less tight. To set free. To release.
This section includes a table of the parts required for the procedure along with an exploded view of those parts for better identification. For example:
The procedure that follows will be outlined using graphics. Each graphic will represent a step, with the number shown in the bottom right. Multiple steps can be required within each step. The order in which to conduct each step will be given with sequence numbers at the top left of the symbols. Any type of special tooling needed to compete the step will be provided in a table and will be denoted in the applicable graphic at the bottom left of the symbol. If an action needs to be performed more than one time, a repetition number will be denoted at the bottom right of the symbol. General notes about the action, such as torque specifications or object weight, will be listed at the bottom of the symbol.
Sequence number steps that only contain a single symbol.
When a succession of events is needed per sequence number, symbol chains may be used. Perform the tasks is an order proceeding from left to right.
Decision Tree Symbols
Some service actions require a measurement or observation to perform the appropriate service action from two or more alternative responses. Service actions that can result in two or more alternative responses can be communicated as shown in 56, and 7. Examples actions include, but are not limited to, performing adjustments to achieve a specified fluid level, pressure, voltage, torque, and clearance.
Alternative Service Actions with Selection Criteria|
Alternative Service Actions with Measured Selection Criteria|
In both figures, a white filled rectangle with a white halo surrounding the rectangle's lines encloses all of the symbols communicating, the service action.
The symbol in the upper-left corner of the rectangle communicates the action to be performed. The action area is separated from the action(s) by a solid, horizontal line across the entire rectangle. Service action(s) results are separated by a dashed, horizontal line. The actions and results are read from left to right, beginning at the top.
Service action results are documented via a vertical list. Each service action result includes, from left to right: the following elements:
- The conditions or specifications for which the service action result. This element is optional and only shown if the requirements for selecting the action are not obvious.
- The service action result to be performed.
- Supplemental information about the service action result; such as the specification to be achieved, number of repetitions of the action and etcetera. This element is optional.
In cases where the service action refers to other steps, identify the location using a step label. Refer to Illustration 7.
Alternative Service Action Results with Identification to Other Information Steps|