33
NOTE: Do not attempt this while engine is running.
NOTE: Do not over oil the reusable element
Engine model
Air filter
restriction limit
(inches of water)
C18H0-UFAD12
25
C18H0-UFAD12-D
C18H0-UFAD22
C18H0-UFAD22-D
C18H0-UFAD32
C18H0-UFAD32-D
C18H0-UFAD42
C18H0-UFAD42-D
C18H0-FMAD12-S
C18H0-FMAD12-DS
C18H0-FMAD22-S
C18H0-FMAD22-DS
C18H0-FMAD32-S
C18H0-FMAD32-DS
C18H0-FMAD42-S
C18H0-FMAD42-DS
Figure #14
Note: Intake Air Shutoff Valve - Engine may
include an intake air shutoff valve as an optional
feature that is activated by an overspeed event and
provides a positive shutoff of combustion air to the
engine. The optional air intake shutoff valve has
not been evaluated by UL as part of a UL Listed
fire pump driver.
3.2.4 Crankcase Ventilation
Vapors that form within the engine are removed from
the crankcase and gear train compartment by a
continuous, pressurized ventilation system. A slight
pressure is maintained within the engine crankcase
compartment. Vapors are expelled through a vent pipe
attached to the rocker cover. Ref. Figure #15. Contact
Clarke for an optional breather kit if vapors accumulate
in your pump room.
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