'A' MAINTENANCE CHECKS
CHECK LEAKS AND CORRECT
Check for evidence of external air, coolant or oil
leakage. Tighten capscrews, fittings, connections or
replace gaskets as necessary to correct. Check oil
dipstick and filler tube caps. Fig. 2-1. See that they are
If there are indications of air leaks on suction side of
fuel pump, check for air leaks by placing ST-998 Sight
Gauge (1, Fig. 2-2) in the line between fuel filter(s) or
fuel tank and pump. Bubbles or "milky" appearance
indicates an air leak. Find and correct.
CHECK OIL BATH CLEANER OIL LEVEL
ENGINE OIL LEVEL
Daily check oil level in oil bath air cleaner to be sure
oil level in oil cup is at indicated mark. To remove oil
1. Check oil level with dipstick oil gauge located on
cup, loosen wing nuts. During wet weather and in winter
the engine. For accurate readings, oil level should not
months, excessive moisture in air cleaner oil sometimes
be checked until oil has settled into pan after engine
causes cleaner to become flooded and results in oil pull-
shut-down. Keep dipstick with the engine and oil pan
over or plugging of the bottom air cleaner screen. Add
with which it was originally furnished. Keep oil level as
or change oil as necessary.
near "H" (high) mark as possible.
CHECK COMPLETELY FOR DAMAGE
CAUTION: NEVER OPERATE THE ENGINE WITH OIL
LEVEL BELOW THE "L" (LOW) MARK OR ABOVE THE
Visually check fuel system, aneroid (if used), etc. for
misadjustment or tampering, check all systems and
connections for leaks or damage.
2. Add oil as necessary of the same quality and brand
as already in the engine. See Section 3.