Table 4-1. Unit Preventive Maintenance Checks and Services (continued)
W - Weekly
M - Monthly
Q - Quarterly
Item to be
Inspect for loose screws, nuts, or bolts.
Service hand brake in accordance with LO 55-
2210-224-12 Check for proper operation.
Check emergency brake valve for proper
operation and security of mounting. Test to
see that valve operates properly.
Check heater for proper operation. Check
for loose or missing hardware.
a. Check throttle for proper operation.
Move handle from IDLE to position 8
while listening for roller switches to
snap into each notch.
b. Check reverser for proper operation.
Check gages and instruments for proper
Section IV. UNIT TROUBLESHOOTING
This section contains testing and troubleshooting information for locating and correcting most of the
operating troubles which may develop in the locomotive. Each malfunction for an individual
component, unit, or system is followed by a list of tests or inspections which will help you determine
corrective actions. You should perform the test/inspections and corrective actions in the order listed.
4-8 TROUBLESHOOTING PROCEDURES.
The symptom index lists the common malfunctions which you may find during the operation or
maintenance of the locomotive or its components. Use the symptom index for quick access to the
troubleshooting procedures in table 4-2.
This manual cannot list all possible malfunctions that may occur, nor all tests or inspections and
corrective actions. If a malfunction is not listed (except where malfunction and cause are obvious) or
is not corrected by listed corrective actions, notify intermediate direct support maintenance.