2-11. OPERATION IN EXTREME HEAT.
a. General. Accumulated dirt on engine reduces radiation of heat. Keep the unit clean to avoid overheating.
b. Cooling System.
(1) Keep the engine cooling fans clean.
(2) Keep all exposed cylinder blocks and flywheel surfaces of the engine clean.
(3) Remove all obstructions to the flow of air across the engine.
c. Lubrication. Refer to the current lubrication order (fig. 3-1).
d. Electric Motor. Hot, dry periods subject connectors, receptacles, and binding posts to damage from dust and
dirt. If possible, operate electric motor in the shade. Do not remove front panel or chassis components unless re-
quired. Make more frequent PMCS.
2-12. OPERATION AT HIGH ALTITUDES.
The unit is designed to operate at 8000 feet (2438.4 meters) above sea level without special adjustments. However,
at higher altitudes, the carburetor may require adjustment. Refer to figure 4-19 for adjustment procedures.
2-13. OPERATION IN DUSTY OR SANDY AREAS.
a. Protection. Take advantage of natural barriers that will afford some protection against blowing sand and dust,
or if necessary, erect artificial barriers.
b. Air Cleaner. Service the air cleaner frequently. Refer to figure 3-2 for servicing procedures.
c. Filter/Separator Element. Service the filter/separator frequently. Refer to figure 3-5 for servicing procedures.
d. Cleaning. Keep the tanks, and areas around the discharge valve and controls free from sand and dust.
Ensure all open parts of the tank and pump unit are protected
2-14. OPERATION UNDER RAINY OR HUMID CONDITIONS.
When the unit is outside and not operating, protect it with a canvas or other waterproof cover. Remove the cover
during dry periods to allow the unit to dry out. Keep the fuel tank full to prevent the forming of condensate. Give special
care to keeping all components free from moisture. Clean and paint all surfaces not otherwise protected.