These lubrication instructions are for unit level maintenance personnel. Lube intervals (on-condition or
hard time) are based on normal operation. Lube more during constant use, and less during inactive
periods. Use correct grade of lubricant for seasonal temperature expected.
Always wipe clean oil filler components before starting your lube service. Use correct type
or grade of oil. Overfilling will cause spillage and harm engine components.
The engine oil filter shall be changed as applicable when:
It is known to be contaminated or clogged.
The prescribed hard time interval has anived.
This heater is not enrolled in the Army Oil Analysis Program (AOAP). Hard time service intervals apply.
For equipment under manufacturer's warranty, hard time oil service intervals shall be followed. Intervals
shall be shortened if lubricants are known to be contaminated or if operation is under adverse conditions
(such as longer than usual operating hours, extended idling periods, or extreme dust).
Table 2. Lubricant Table for Large Capacity Field Heater (LCFH)
Lubrication Mil Symbol
-65F to +40F (-54C to +5C)
3 qts. (2.8 ltrs.) 500 hours 0.25
DRAIN AND SERVICE ENGINE OIL AND FILTER AS FOLLOWS:
Allow the engine to cool for approximately 30 minutes before changing oil.
Engine oil is hot and presents a burn hazard. Coming in contact with hot
engine oil may cause burns and severe injury.
The engine must be standing level and be switched off. Be sure to change the oil when
the engine is warm (not hot) so that the engine oil remains easy to drain. Be sure to
collect the used oil and dispose of in accordance with Unit SOP and local regulations.
1. Remove oil drain hose (1) from spring clamp (2). Loosen and remove oil drain plug (3) and allow
the oil to drain out into an approved container.
2. Clean the oil drain plug (2) and reinstall on oil drain hose (1).
3. Return oil drain hose (1) to spring clamp (2).