Tennant 235D, Руководство пользователя

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MAINTENANCE
3-17
235 MM331 (3--93)
Use soft, clean water mixed with permanent-type,
ethylene glycol antifreeze in a one-to-one ratio to
fill the cooling system. Deposits of sludge, scale,
and rust prevent normal heat transfer. Flush the
radiator and the cooling system after every
200 hours of operation with a dependable
cleaning compound. Follow the mixing procedure
recommended by the compound manufacturer.
This is important because of the difference in
concentration and composition of the cleaning
compounds. After cleaning, flush the system with
clean water.
A
B
03504
RADIATOR
A. Radiator
B. Pre-Screen
Whenever a cooling system is badly rust-clogged,
as indicated by overflow loss or abnormally high
operating temperatures, corrective cleaning by
reverse flow flushing will most effectively remove
the heavy deposits of sludge, rust, and scale. The
reverse flow flushing should be performed
immediately after draining the cleaning solution.
Flush the radiator first, then the engine, to allow
the engine to cool as much as possible.
Engine overheating may also be caused by dirty
radiator fins or pre-screen. The exterior fins of the
radiator can be cleaned with an air or water hose.
Clean or replace the radiator pre-screen after
every 75 hours of operation.
FOR SAFETY: When Servicing Machine, Wear
Eye And Ear Protection When Using
Pressurized Air Or Water.
A pressure cap is used on each radiator to
prevent overflow loss of water during normal
operation. A spring-loaded valve in the cap closes
the outlet to the overflow pipe of the radiator and
thus seals the system.
Pressure developing within the system raises the
boiling point of the coolant and allows higher
temperatures without overflow loss from boiling.
One pressure valve opens at 13 psi (90 kPa),
allowing steam and water to pass out the overflow
pipe into the coolant tank. The other pressure
valve opens at 17 psi (115 kPa).
FOR SAFETY: When Servicing Machine, Avoid
Contact With Hot Engine Coolant.
ATTENTION! Never pour cold water or cold
antifreeze into the radiator of an overheated
engine. Allow the engine to cool to avoid
cracking the cylinder head or block. Keep the
engine running while adding water.
AIR INTAKE SYSTEM
The importance of maintaining an air filter cannot
be overemphasized. Dirt ingested through
improperly installed, improperly serviced, or
inadequate air filter elements wears out more
engines than long hours of operation. Even a
small amount of dirt will wear out a set of piston
rings in just a few hours. Operating with a clogged
air filter element also causes the fuel mixture to
be richer, which can lead to formation of harmful
sludge deposits in the engine. Always cover the
air intake when the air filter is removed for
servicing. Do not neglect servicing the air filter.
Use only approved replacement parts. Keep all
other air intake components such as hoses and
clamps secure and in good condition to prevent
entrance of unfiltered air.
Over maintenance can cause more damage than
good. Removing the air filter element more often
than is needed allows contaminants to enter the
engine unnecessarily. Clean or replace the air
filter element only when it is scheduled.