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Table 5-1. System Symptom Index-continued
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Table 5-2. Direct Support Troubleshooting-continued -706880677
TM 5-4210-233-14&P-1
Table 5-2. Direct Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AUXILIARY POWER UNIT
1
APU ENGINE LOW POWER
Step 1. Check governor adjustment and linkage.
Adjust governor and/or replace linkage (see para 5-79).
Step 2. Check engine adjustments.
Check valve adjustment (see para 5-80), decompression release adjustment (see
para 5-73), injector opening pressure adjustment (see para 5-77), and injection pump
adjustment (see para 5-78).
Step 3. Test compression with gauge.
If compression is below 350 - 400 psi (2415 - 2760 kPa) at 1800 rpm, refinish or replace
valves and seats (see para 5-72), and/or replace piston rings (see para 5-74).
Step 4. Governor worn or damaged:
Repair governor (see para 5-79).
WATER PUMP AND PIPING
1
PUMP WILL NOT ENGAGE
Step 1. Check pump switch and shift linkage.
Step 2. Check power and ground connections at transmission lock up solenoids.
2
PUMP CASING LEAKS WATER WHILE PUMPING
Step 1. Check location of leak.
Repair pump as required (see para 6-6).
RADIATOR
1
OIL IN RADIATOR COOLANT
Sample radiator coolant and determine whether oil is from engine or transmission.
Overhaul engine or transmission as required (see Chapter 6).
5-6

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