ITEM TO BE INSPECTED
With the engine cold, open the radiator access cover on top the engine housing and remove the radiator
cap. If the coolant level is low, check for coolant leaks. Some leaks are evident only when the engine is
hot, and the coolant system is fully pressurized.
Inspect the fan belt for glazing, cracks, or other wear. The belt must deflect 3/4 to 1 inch with thumb
pressure at midpoint of the longest belt span. Adjust belt as described in paragraph 4-31.
HOSES AND PIPING
Inspect fuel lines, fuel pump, coolant hoses, water pump, and pump gage lines for leakage, Tighten fuel
line fittings as necessary. Replace leaking parts.
Inspect pump suction and discharge assemblies for loose mounting or damage. Check that the pump is
firmly mounted to the chassis. The pump must be aligned carefully with the engine. Align and tighten a
Inspect engine shrouds and chassis frame for cracks or damage. If damage is extensive, refer to direct
support maintenance for repair.
Fill tires to 40-psi air pressure and inspect them for cuts, bruises or blisters. Tire repair is described in
Turn grease cup on tachometer drive clockwise two full turns to provide grease to the gear teeth. When
the grease cup is turned down all the way, refill it with automotive grease and reinstall it. Add grease at
RADIO SUPPRESSION EQUIPMENT.
Inspect spark plug cable shields for wear or breaks. Replace if necessary. Tighten engine ground
straps as required.
Check magneto breaker point gap. Adjust magneto breaker point gap to 0.015 inch (para 4-35).
STARTING MOTOR OPERATION
Follow starting procedure described in paragraph 2-3. While starting motor is engaged, listen for
unusual noises or sluggish operation. Replace if defective (para 4-42).
Note the alternator charging rate indicated on the ammeter. For the first few minutes after the engine is
started, the charging rate should be high, but it should level off to a lower value within 10 minutes, if
batteries were properly charged at startup. If the alternator or regulator is visibly damaged. replace as
required (para 4-38 and 4-39).
Clean governor linkage and lubricate with light engine oil. With the engine running at operating
temperature, push throttle control all the way in and note engine speed on tachometer. Maximum no-
load governed speed must not exceed 2450 rpm. Governor adjustment is described in paragraph 4-27.
Section VI. TROUBLESHOOTING
a. This section contains troubleshooting or
may find during the operation or maintenance of Pump,
Centrifugal or its components. You should perform the
malfunction information and tests for locating and
tests/inspections and corrective actions in the order
correcting most of the troubles which may develop in the
Pump, Centrifugal. Each malfunction or trouble
symptom for an individual component, unit, or system is
4-13. Organizational Maintenance Troubleshooting
followed by a list of tests or inspections necessary for
you to determine probable causes and suggested
corrective actions for you to remedy the malfunction.
Refer to table 4-2 for troubleshooting which is allocated
b. This manual cannot list all possible malfunctions
to organizational maintenance levels.
that may occur or all tests or inspections, and corrective
actions. If a malfunction is not listed, or is not corrected
by listed corrective actions, you should notify higher
Before you use this table, be sure you have
performed all applicable operating checks.