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TM 5-4210-220-12
Table 3-1. OPERATOR TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
16f ENGINE WILL NOT REACH WORKING TEMPERATURE
Step 1. Check auxiliary engine cooler is closed off.
Close cooler control valve.
Step 2. Check shutter/fan are in AUTO.
Set to AUTO.
16g ENGINE IS OVERHEATING
Step 1. Check if truck is pumping in structural mode.
Open auxiliary engine cooler control valve to reduce engine coolant temperature.
Step 2. Check if shutters are open.
Set SHUTTER/FAN CONTROL to MANUAL in cab.
Check shutters open (fan will engage also).
Step 3. Check engine coolant level in radiator.
Add coolant if level is low.
NOTE
If on a mission and a leak occurs in the winterization circuit, close all valves on right hand side
of engine to isolate leak from engine. If engine coolant is continually lost, refer to Organizational
Level for repair.
Step 4. Check for debris in front of radiator.
Remove debris.
16h ENGINE FOOT THROTTLE WILL NOT OPERATE
Step 1. Check air pressure is normal.
Wait until secondary air pressure is out of alarm.
Step 2. Check if fire system selected to CFR and pump engaged.
Use brakes to control truck speed.
3-11
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