TM 5-3825-225-14&P
Section IV. UNIT TROUBLESHOOTING PROCEDURES
4-5. GENERAL.
a.
This section contains the troubleshooting procedures assigned to water distributor unit maintenance personnel.
b.
Possible water distributor malfunctions are listed in the Troubleshooting Symptom Index (see paragraph 4-6).
The Troubleshooting Table (Table 4-2) lists the malfunction, the probable cause and the corrective action to be taken.
c.
Before performing unit troubleshooting, ensure that all applicable operator/crew troubleshooting has been
performed.
d.
If any of the following malfunctions cannot be corrected or their cause cannot be found, notify direct support
maintenance personnel.
4-6. TROUBLESHOOTING SYMPTOM INDEX.
Troubleshooting
Procedure
Page
Engine Fails to Crank ............................................... .................................................................... ....
4-8
Engine Cranks But Does Not Start ......................................................... ...................................... ....
4-9
Engine Does Not Develop Full Power ........................................................................................... ....
4-10
Exhaust Is Smoky ........................................................................ ................................................ ....
4-10
Oil Pressure Is Lost ...................................................................... ................................................ ....
4-10
Engine Overheats ........................................................................ ................................................ ....
4-10
Water Distributor Pump Will Not Prime .................................................... .................................... ....
4-11
Pump Stops Pumping Until Engine Is Stopped and Restarted ...................................................... ....
4-11
Auxiliary Throttle Control Valve Does Not Operate .......................................... ............................. ....
4-11
Sprinkler Valves Do Not Operate .......................................................... ....................................... ....
4-12
4-2. Unit Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE FAILS TO CRANK.
Step 1.
Check the battery cables for fraying, chafing, corrosion, or looseness.
Replace, clean, or tighten battery cables as necessary (see paragraph 4-20).
Step 2.
Test the battery for low charge (see paragraph 4-20).
Replace the battery as necessary (see paragraph 4-20).
Step 3.
Test the ignition switch and the starter switch. Turn ignition switch to ON and check the voltage across
the switch with a multimeter. It should read 12V. Push the starter switch and check the voltage across it
with a multimeter. It should read 1 2V. Check all the ignition wire terminals for damage or looseness.
Replace switches as necessary. Replace or tighten wires and terminals as necessary (see paragraph
4-21).
4-8
