Gravely Pro-Ride 254 Owner's/Operator's Manual page 35

IMPORTANT: To prevent excessive engine
wear, do not run the engine without the air
cleaner installed.
IMPORTANT: The engine is air cooled and
requires a large amount of air intake when
running. Reduced air intake can cause
overheating. Always keep air intake screen
and cooling fins clean. Always keep the
covers and screens in place.
4
6
Figure 24
The Unloader Valve (1) will allow for the
removal of fine dirt and dust from the canister
body (3) without disassembly. While in
operation, this valve will suck closed at 1/3 to
1/2 throttle.
• With the engine shut off, squeeze the
valve by hand to release dust and
debris.
• In very dusty operating conditions, the
valve may have to be opened every 2
to 3 hours.
Remove the air cleaner cover and make a
general inspection of the entire assembly. If it
is unusually dirty or if dirt build-up is easily
visible on the inside of the canister body, the
entire assembly, including the inlet hose,
must be removed from the carburetor and
engine.
With the air cleaner removed from the engine,
and with the cartridges and gaskets removed,
wash the hard parts with cleaning solvent and
blow them dry with compressed air. DO NOT
wash the air cleaner cartridges.
NOTE: If canister gaskets are broken or
missing, BOTH air cleaner elements MUST
be replaced.
Inspect and clean the primary air cleaner
cartridge (5) assembly every 25 hours.
Replace the paper element yearly or every
250 hours, whichever comes first.
The outer cartridge is cleaned by rolling and
"tapping" it on a hard surface. If the paper
pleats are punctured or torn, the element
must be replaced.
3
5
1
Replace the inner cartridge (6) yearly or
every 250 hours whichever comes first.
IMPORTANT: DO NOT attempt to clean the
secondary element. This filter element must
be replaced if it is unusually dirty or
damaged.
NOTE: Operation in dusty conditions may
require more frequent maintenance of the
primary and secondary air cleaner cartridges.
CAUTION: Do not use
pressurized air to clean paper
element.
2
FUEL SYSTEM SERVICE
CAUTION: Fuel vapors are
explosive and flammable. Do not
smoke while handling fuel. Keep
fuel away from flames or sparks.
Shut off engine before servicing.
Always work in a well-ventilated
area. Clean up spilled fuel
immediately.
Be sure the engine is stopped, the
steering control levers are in the
park position and the key is
removed before making these
repairs.
Be sure to inspect the fuel lines
periodically. The lines are subject
to deterioration and wear. Fuel
could leak out onto a running
engine and cause a fire.
WARNING: Improper use of
solvents can result in fire or
explosion. Do not use gasoline or
low flash point solvents to clean
the fuel filter and/or the fuel pump.
Clean only in a well-ventilated
area away from sources of sparks
or flame, including any appliances
with a pilot light.
IMPORTANT: Special care should be taken
when the fuel lines are removed for
maintenance or repair. Close both ends of the
fuel line with a piece of paper or a clean cloth
to prevent dust or dirt particles from
contaminating the fuel. Even a small amount
of dust or dirt can cause premature wear or
failure of fuel components.
The fuel line connections are composed of
rubber and they will age regardless of the
service period. If there is any deterioration of
the fuel lines or clamps, replace them.
Check the fuel filter regularly. If it is clogged
by debris or contaminated with water, replace
it.
GB - 35