PREVENTIVE MAINTENANCE
SECTION V
Perform `A', `B' and `C' Maintenance Checks each time the
DRAW OIL SAMPLE
following checks are performed.
The engine oil and torque converter are provided with oil
PERFORM QUARTERLY LUBRICATION
sampling valves (see Figure 5D-2). At quarterly intervals
draw an oil sample from the engine and torque converter
Refer to the lubrication charts, in Section III, and lubricate
and have it analyzed. Remove the caps from the valves,
the quarterly lubrication points with the type of lubricant
depress the valve plunger and draw a sample of oil. See
specified.
Supplemental Operating, Maintenance and Repair Parts
CHECK CONDITION OF COOLING
Instructions (SOMARPI) for specific instructions on using
SYSTEM HOSES
the oil sampling valves.
Inspect all of the engine, torque converter, and propel cool-
ing system hoses at least once every 500 hours for signs of
deterioration. Replace the hoses if necessary.
CHANGE PROPEL AND CONTROL
FILTER ELEMENTS
The propel and control filters are located on top of the hy-
draulic reservoir. To replace the filter elements, proceed as
follows (see Figure 5D-1):
1. Remove the six capscrews that hold the filter caps to the
head.
2. Pull the filter element and spring assembly from each
filter head.
Figure 5D-2. Engine and Torque Converter
3. Discard the paper elements and clean the filter interior
Oil Sample Valves
with a lint free rag.
4. Inspect and lubricate the O-rings and gaskets.
CHECK AIR SYSTEM
Check all air system connections in the air system to be sure
5. Replace the filter elements and spring assemblies.
they are tight. Check all hoses for punctures or other dam-
6. Install the filter caps and secure with the capscrews.
age and replace, if necessary.
CHECK EXHAUST SYSTEM
Check the exhaust manifold retaining nuts, exhaust flange
clamp and other connections for tightness. Check for proper
operation of the exhaust pipe rain cap.
CHECK THERMOSTATS AND SEALS
Check the thermostats and seals (preferably at the time the
cooling system is prepared for winter operation). Replace
the seals if necessary.
CHECK FAN HUB
If the fan bearing hub assembly is provided with a grease
fitting, use a hand grease gun and lubricate the bearings
with one shot of multi-purpose grease (see Section Ill) every
20,000 miles (approximately 700 hours}.
Every 4000 hours clean, inspect and repack the fan bearing
hub assembly with the above recommended grease.
At a major engine overhaul, remove and discard the bear-
ings in the fan hub assembly. Pack the hub assembly, using
Figure 5D-1. Propel and Control Filters
new bearings, with multi-purpose grease (see Section III).
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