TM 55-2210-224-34
Table 3-1. INTERMEDIATE DIRECT SUPPORT AND INTERMEDIATE GENERAL SUPPORT
TROUBLESHOOTING (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
SANDING SYSTEM
48. SANDING SYSTEM WILL NOT FUNCTION.
Step 1. Check for obstruction in sandboxes, sander hoses, and/or sand controllers.
Remove obstructions in sandboxes, sander hoses, and/or sander controller valves.
Step 2. Check for defective sander control valve.
Repair or replace sander control valve (para 3-17).
Step 3. Check for defective sander switch.
Replace sander switch (TM 55-2210-224-12).
SPEED-SENSING CIRCUIT
49. LOCOMOTIVE DOES NOT TRANSITION OR TRANSITIONS AT WRONG SPEED.
Step 1. With locomotive in motion, check for no Hertz at TB1-M.
Repair or replace speed-sensing alternator (para 3-35).
Step 2. With locomotive in motion, check for no Hertz at TB1-L.
Remove transition relay panel and notify intermediate general support personnel (para 4-6).
THROTTLE CONTROLLER MECHANISM
50. THROTTLE CONTROLLER MECHANISM DOES NOT RESPOND.
Step 1. Check for improper operation of throttle control valves.
Repair or replace control valves (TM 5-2815-233-14).
Step 2. Check for defective controller mechanism.
Repair or replace controller mechanism (para 3-34).
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