PREVENTIVE MAINTENANCE
SECTION V
Perform `A', `B', `C' and `D' Maintenance Checks each time
the following checks are performed.
CLEAN CRANKCASE BREATHER
Remove the crankcase breather from the top of the engine
every 1,000 hours and wash the steel mesh pad in fuel oil
and dry it with compressed air. This cleaning period maybe
reduced or lengthened according to the severity of service.
CLEAN COOLING SYSTEM
Never fill a hot engine with cold coolant. This
could damage the radiator and/or engine.
Clean the cooling system (engine and radiator) using a good
quality radiator cleaning compound in accordance with the
instructions on the container. After the cleaning operation,
rinse the cooling system thoroughly with fresh water; then
fill the system with soft water, adding a good grade of rust
inhibitor or high boiling point type antifreeze as specifiedin
the Engine Manufacturer's Manual. With the use of a
proper antifreeze or rust inhibitor, this interval may be
lengthened until this cleaning is done only in the spring or
fall. The length of this Interval will. however, depend upon
Figure 5E-1. Drain Chain Case
an inspection for rust or other depositson the internal walls
of the cooling system. When a thorough cleaning of the
reaches the bottom of the oil level opening. Replace the
cooling system is required, it should be reverse flushed.
breather and oil level plug.
CHANGE CHAIN CASE OIL
CHANGE PROPEL AND CONTROL
SYSTEM FLUID
To change the oil in the chain case, proceed as follows (see
To change the oil in the hydraulic reservoir, proceed as fol-
lows (see Figure 5E-2):
1. Engage the engine clutch and run the engine until the oil
in the chain case is warmed to normal operating temper-
1. Warm the oil in the system to its normal operating tem-
ature.
perature. Place the propel brake switch in the ON position
and shut down the engine.
2. Remove the drain plug as shown in Figure 5E-1. Re-
move the other drain plug located between the hoist and
swing shafts on the right side of the case.
3. Attach a suction hose to the drain ports and drain the oil
The oil in the reservoir is HOT. Therefore, take
from the case. Clean and replace the plugs.
precautions when removing the reservoir drain
plug to prevent oil burns.
4. Flush the chain case with kerosene to clean out any par-
ticles remaining in the gear case.
2. Position a container, having a capacity of approximately
25 gallons under the drain plug located under the left rear
5. Remove the drain plugs and drain the kerosene into a
side of the upper. Drain the contents of the reservoir. Clean
suitable container. Replace the drain plug after all the
the drain plug and replace it after the oil has been drained
kerosene has been drained from the gear case.
from the reservoir.
6. Remove the breather at the top of the gear case, wash it
3. Remove the reservoir filler screen, wash it in kerosene
in kerosene, and dry it with compressed air
and dry it with compressed air. Fill the reservoir using a 10
7. Clean the area around the oil level plug opening, and
micron filtering screen, up to the sight gauge high level
then remove the oil level plug. Add oil, of the type specified
mark with the type of fluid specified in Section III. Install the
in Section Ill. through the breather opening until the oil
filler screen and cap.
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