Section II. TROUBLESHOOTING

TM 10-3930-673-34

Section II.

TROUBLESHOOTING

2-4. GENERAL

The Troubleshooting Fault Index (Table 2-1) lists the most common failures experienced during operation of

the forklift. Find the symptom that is closest to the symptom your forklift has and refer to that step for the

troubleshooting procedures. This manual cannot list all malfunctions that may occur, nor can it list all tests,

inspections, and corrective actions. Obvious mechanical failures and damage are not covered. If a malfunction

is not listed or is not corrected by the corrective actions described, notify your supervisor. Additional

troubleshooting procedures are detailed in TM 10-3930-673-20-1.

2-5. TROUBLESHOOTING PROCEDURES

Paragraph 2-8 details common malfunctions which may occur during the operation of the ATLAS. This

section includes troubleshooting procedures for the engine, drivetrain, steering, brakes, and

hydraulics. Table 2-1 lists the symptoms covered.

2-6. INTRODUCTION TO LOGIC TREE TROUBLESHOOTING

a. Page Layout. Troubleshooting procedures are divided into logic tree pages and test pages.

(1) A logic tree page is always a left-hand page, facing the test page on the right. The logic tree page

provides the sequence of steps required to isolate a fault to a failed component. All critical information for

decision making is on the left-hand page. Each logic tree page contains the following information:

(a) INITIAL SETUP This box is located only on the first logic tree page of a fault. INITIAL SETUP

lists tools, materials, references, personnel, and equipment needed to troubleshoot the fault.

(b) KNOWN INFO This box is located in the top left-hand column. KNOWN INFO lists conditions

and information that will eliminate specific components as the cause of the fault.

components that could cause a fault are listed in the POSSIBLE PROBLEMS box. The first component listed

in the POSSIBLE PROBLEMS box is the one that will be tested at that step in the logic sequence. When one

of the components is tested and found to be operational, it is entered at the bottom of the KNOWN INFO box

as OK.

(d) QUESTION Each question, located in the middle column, refers to the first possible problem

listed in POSSIBLE PROBLEMS. If the answer to the question is YES, proceed to the next step. If the answer

is NO, follow the NO arrow to obtain directions for correcting the problem. If the step contains a WARNING

or CAUTION message, a small shadow box is printed above the question. Text for WARNINGS and

CAUTIONS is on the following right-hand page.

(e) TEST OPTIONS This box is located directly below TEST OPTIONS. It explains the purpose

for the question in the middle column.

(f) REASON FOR QUESTION This box is located directly below TEST OPTIONS. It explains the

purpose for the question in the middle column.

2-2