SM01-001-0
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Vacuator Valve.
Check the condition of the v alv e and lips frequently
and keep them clean. The v alve lips should be open
only when the engine is shut down, or running at low
Vacuator v alves are designed to expel loose dust
idle speed. If the v alv e is turned inside out, check for
and dirt accumulations from the air cleaner body
a clogged air cleaner inlet. Malfunction of this v alve
automatically, thus lengthening the element service
does not reduce the air cleaner effectiveness, but
life. The v alv e lips must point straight down to
does allow the element to get dirty faster and
operate effectively, and must be kept free from
reduces serv iceable life. If a v alve is lost or
debris. Mud and chaff can lodge in these lips
damaged, replace it with a new v alve of the same
periodically and hold them open during engine
part number.
operation.
Duct Work.
1. Check the intake pipe cap and screen for ac-
cumulation of leav es, trash, and other debris that
could restrict air flow. Repair the screen or replace
the cap if any large holes are found in the screen.
2. Check all mounting hardware for security to
eliminate possible vibration of intake piping. Such
vibration leads to early failure of hoses, clamps, and
mounting parts, and can cause hoses to slip off the
connecting pipes, allowing unfiltered air into the
engine air intake.
3. Check hoses for cracks, chafing, or deteriora-
tion, and replace at the first sign of probable failure.
0252-5
