SYMPTOMS INDEX

TM 55-1730-228-13&P

Troubleshooting charts follow the symptoms index.

Keep in mind that it is not possible to list all malfunctions that may develop. If a problem develops that is not

included in the symptoms index, notify your supervisor who will take the appropriate action.

Each major SPEMS system is listed in the Symptoms Index. Specific symptoms for each symptom are

indented below the appropriate heading. Refer to the page indicated for the proper troubleshooting

procedure.

NOTE

Before you begin troubleshooting, be sure all the preliminary maintenance checks and services (PMCS)

have been done. Refer to Chapter 2, Table 2-1.

When troubleshooting the SPEMS, keep the following in mind:

(1)

Always use the electrical schematic when troubleshooting the electrical system. See Foldouts (back of

this manual).

(2)

Hydraulic pressure varies by design from one branch of the hydraulic system to another. Always refer

to the hydraulic system schematic to determine proper system pressures at various locations to

compare with measures values. See Foldouts (back of this manual).

(3)

A multimeter (VOM) is necessary for checking electrical circuits and components. Refer to para 3-8,

Multimeter Function and Use.

SYMPTONS INDEX

SYSTEM

SYMPTOM

PAGE

ELECTRICAL SYSTEM

SPEMS does not respond to drive control ................................ ................................ ..............

4-4

4-5

Pump does not find or hold neutral ................................ ................................ .........................

4-9

Platform will not traverse ................................ ................................ ................................ ........

4-16

Engine will not stop ................................ ................................ ................................ ................

4-17

DRIVE SYSTEM

SPEMS does not respond to drive control ................................ ................................ ..............

4-4

4-5

Brakes do not release ................................ ................................ ................................ .............

4-6

Brakes do not engage ................................ ................................ ................................ ............

4-7

SPEMS travels at a slow or erratic rate ................................ ................................ ..................

4-4

4-8

SPEMS will travel in one direction only ................................ ................................ ..................

4-4

HYDRAULIC SYSTEM

SPEMS does not respond to drive control ................................ ................................ ..............

4-4

4-5

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4-2