|
| |
listing of preventive maintenance services which must
be performed by the operator. The item numbers are
listed consecutively and indicate the sequence of
minimum requirements. Refer to figure 3-2 for the daily
preventive maintenance services.
3-7. Quarterly Preventive Maintenance Services
a.
This paragraph contains all illustrated tabulated
listing of preventive maintenance services which must
be performed by organizational maintenance personnel
at quarterly intervals. A quarterly interval is equal to
three calendar months or 250 hours of operation,
whichever comes first.
b.
The item numbers are listed consecutively and
indicate the sequence of minimum requirements. Refer
to figure 3- for quarterly preventive maintenance
services.
Section IV. OPERATOR'S MAINTENANCE
3-8. General
Instructions in this section are published for the
information and guidance of the operator to maintain the
fire truck.
a.
Chassis (Government furnished TM 9-2320-209-
10).
b.
Daily preventive maintenance service (para 3-
6).
Section V. TROUBLESHOOTING
3-9. General
This section provides information used in diagnosing
and correcting unsatisfactory operation or failure of the
fire truck and its components. Each trouble system
state is followed by a list of probable causes. Any
trouble beyond the scope of organizational maintenance
will be reported to direct support maintenance.
3-10. Fire Pump Capacity Drops
Probable cause
Possible remedy
Engine RPM too low...... Adjust throttle, (pare 3-45)
Fire pump loses prime .. Check for air leaks.
Submerge suction at
deeper supply point.
Reprime pump.
Fire truck too high to
permit pump suction.. Change position of fire
truck.
3-11. Fire Pump Fails to Deliver Water Upon
Starting
Probable cause
Possible remedy
Lift required beyond
pumps capacity ......... Draw supply from different
source or change post
tion of fire truck.
Water discharge valve
closed ....................... Open water discharge valve,
Discharge head required
higher pump speed.... Increase engine speed.
3-12. Pump Clutch lever is Hard or Impossible to
Engage
Probable cause
Possible remedy
Improper linkage or
clutch adjustment ...... Adjust clutch or linkages
as necessary. (para 3-90)
Disconnected, worn, or
bent linkage............... Connect, repair or replace
faulty parts, (para 3-90)
3-13. Fire Pump Vibrates or Becomes Noisy
Probable cause
Possible remedy
Cavitation occurring ...... Check suction pressure, re-
locate suction strainers
when pumping from
draft. Reprime the pump.
Pump vapor bound and
not fully loaded.......... Temporarily reduce speed
or partially close dis-
charge valve.
3-14. Foam Pump Fails to Deliver Adequate Foam
Discharge
Probable cause
Possible remedy
Foam concentrate supply
is exhausted.............. Refill foam tank. (pare 2
Foam concentrate tank
13)
valve is in closed
position ..................... Open valve. (pare 2-13)
Improperly adjusted
foam metering valve .. Adjust foam metering
valve. (pare 2-13)
3-9
|
