TM 5-3820-245-14&P
CHAPTER IV
PREVENTIVE MAINTENANCE
4-1
GENERAL INFORMATION
This section contains all of the recommended procedures, instructions, and technical data which the operator will
need in order to perform necessary preventive maintenance.
4-2
EQUIPMENT LUBRICATION
Determination of when oil changes are made, filter elements are to be cleaned and/or replaced and lubrication of
equipment is required, should be based on the severity of operation. The recommended lubricating instructions
provided herein are based upon normal operation, and should be varied in accordance with the hours of
operation, climate and digging conditions. An equipment lubrication diagram has been included to show the
general location of all points which require periodic lubrication. This chart also lists the various points and
provides data such as quantities, types of lubricants recommended, and the recommended frequency of
lubrication.
4-3
CARE OF LUBRICANTS
Keep all lubricants and oils in closed containers. Store them in a clean, dry place protected from excessive heat.
Make sure no dirt, water or other foreign matter becomes mixed with lubricants. Lubricating equipment and
containers should be kept clean and ready for use.
4-4
LUBRICATION POINT CARE
Before lubricating, or filling hydraulic fluids, the fittings, caps, and filler plugs should be thoroughly cleaned to
prevent contamination. After lubrication and filling, remove any excess spilling. After lubrication and filling,
make a thorough check of all lines, connections and fittings for signs of leaks. Start and operate, so a thorough
inspection can be made of equipment under normal operating pressures in order to check for other damage.
4-5
PREVENTIVE MAINTENANCE
In order that the operator may be sure his digger is ready for operation at any time a regular program of
preventive maintenance should be adopted. A maintenance program should be established on the basis of the
operator and/or maintenance personnel performing specific maintenance work during various periods of
equipment operations, at intervals during which the equipment will be idle, and during extended periods of time
when the equipment
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