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 Table 4-1. Preventive Maintenance
Checks and Services
Q - Quarterly
Total manhours, .5
Sequence
Item to be inspected
Work
No.
procedure
time M/H
1
SUCTION STRAINER
.1
Inspect strainer for holes, dirt, and other damage. Inspect gaskets for damage. Service
as required. Inspect cap for loose mounting.
2.
TRAILER FRAME AND MOUNTING HARDWARE
.1
Inspect for damage. Tighten all loose components and mounting hardware.
3.
.1
Inspect for broken lens or insecure mounting.
4.
DRAWBAR
.1
Inspect for insecure mounting and bent or broken parts.
5.
PINTLE HOOK
.1
Inspect for insecure mounting, bent, broken or missing parts, and for improper operation.
Section V. TROUBLESHOOTING
4-13. Troubleshooting
4-12. General
Refer to table 4-2 for troubleshooting.
This section describes the malfunctions which might
occur during operation of the pump assembly along with
the tests and inspections to be performed so that the
malfunction can be isolated and corrective actions
taken.
Table 4-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
PUMP ASSEMBLY FAILS TO PRIME
Step 1. Inspect for leak in suction line or connections.
Tighten or replace hose or piping.
Step 2. Check to see if suction line is clogged.
Remove and clean line and strainer.
2.
PUMP FAILS TO DELIVER TO CAPACITY
Step 1. Inspect lines of suction hose, to see if it has collapsed.
Replace suction hose.
Step 2. Inspect impeller to see if it is clogged with sediment.
Clean and flush the pump assembly.
Clean and replace suction strainer if damaged.
3.
NOISY PUMP OPERATION
Inspect suction strainer to see if it is clogged.
Remove and clean strainer.
4.
NOT ENOUGH PRESSURE
Step 1. Inspect for leak in hose.
Replace hose.
Step 2. Inspect suction line for loose connection.
Tighten connection.
Note. Suction and discharge hoses, valves, fittings and connections must be free of leaks to attain rated capacities.
Section VI. RADIO INTERFERENCE SUPPRESSION
Refer to TM 5-2805-259-14 for radio interference
suppression.
4-3
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