2-10. LEAKAGE CLASSIFICATION AND DEFINITION.
Equipment operation is allowable with minor leak (Class I or
II). Consideration must be given to the fluid capacity in the
item/system being checked/inspected. When in doubt, notify
the supervisor. When operating with Class I or II leaks,
continue to check fluid levels as required in the PMCS. Class
III leaks should be repaired using tools available, if possible.
If not, use Not Fully Mission Capable column criteria.
If leakage is detected, further investigation is needed to
determine the location and cause of the leak. If there is any
doubt, contact your supervisor or Unit Maintenance.
Diesel engine slobber is an inherent condition of two cycle
diesel engines when engines are allowed to idle for prolonged
periods of time. This characteristic may be incorrectly
interpreted as a Class III leak. Check engine oil level. If there is
any doubt, consult with your supervisor or Unit Maintenance.
Class I. Leakage of fluid as indicated by wetness or discoloration not great
enough to form drops.
Class II. Leakage of fluid great enough to form drops but not enough to
cause drops that fall from item being checked/inspected.
Class III. Leakage of fluid great enough to form drops that fall from the
item being checked/inspected. Try to fix leak using tools available.
2-11. OPERATORS PREVENTIVE MAINTENANCE CHECKS
AND SERVICES TABLES.
Engine must be shut off and parking brake set before
performing PMCS walkaround. Severe injury to personnel
Refer to Tables 2-1 through 2-5 for Operators Preventive Maintenance Checks and
Services (PMCS) for all M1074 and M1075 trucks. This routing diagram (Figure 2-24)
will be of help to complete the PMCS. It shows the general path an operator will follow
to complete the PMCS.