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 TM 55-1925-273-10-2
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
TROUBLESHOOTING INDEX
USE OF THE INDEX
Troubleshooting begins by identifying the equipment and the malfunction. Table 1 contains the operator troubleshooting
procedures. The equipment list is contained in the left column of the tables, and the malfunctions are listed in the center
column of the tables. Once the correct equipment and malfunction are located, look immediately to the right for the work
package and procedure that correspond to the malfunction. After locating the appropriate work package and procedure, turn
to that procedure, and follow the instructions in the paragraph below to implement the procedure.
USE OF TROUBLESHOOTING PROCEDURES
Functional flow logic tree troubleshooting procedures are used for all troubleshooting procedures in this manual. In this
troubleshooting style, a pill shaped symbol (figure 1) is used to depict the beginning or end point of a procedure. Decision
points are depicted by diamond shaped symbols (figure 2). Action points, as well as warnings, cautions, and notes are
contained in rectangular symbols (figure 3). Procedures that are too large for one page are joined together by the circular
shaped connector symbols (figure 4). The connector symbol will denote which page and step to go to (or come from) on
another page. Finally, when flowchart lines cross, the technician must ensure that the correct path is followed. Crossing
lines (figure 5) indicate that the points connect. Lines that cross with a jump symbol in the center (figure 6) indicate that the
points do not connect. The technician must correctly follow the arrows to complete the troubleshooting procedure.
Look for the pill shaped beginning symbol in the upper left corner of the procedure. This symbol should contain the
identified malfunction or symptom. Starting from this point, follow the arrowed lines through the procedure. Remember
that the diamond shaped symbols denote a decision step. At each of these points you will be required to make a decision and
to follow the appropriate line for that decision. Continue to follow the arrowed lines through the procedure until the
malfunction or symptom is corrected.
Figure 1. Pill Shaped Symbol
Figure 2. Diamond Shaped Symbol
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