MAINTENANCE
6550D 330330 (5--98)
66
FUEL FILTER
The fuel filter cartridge filters impurities from the
fuel. It is located on the left side of the engine.
Replace the fuel filter element every 400 hours of
operation.
FOR SAFETY: When servicing machine,
keep flames and sparks away from fuel
system service area. Keep area well
ventilated.
FUEL PIPES
Check the fuel pipes every 50 hours of operation.
If the clamp band is loose, apply oil to the screw
of the band, and securely tighten the band.
Made of rubber, the fuel pipes become worn out
whether the engine has been used much or not.
Replace the fuel pipes and clamp bands every
two years.
If the fuel pipes and clamp bands are found worn
or damaged before two years’ time, replace or
repair them at once. Bleed the fuel system after
replacement of any of the fuel pipes, see
TO
PRIME THE FUEL SYSTEM
. When the fuel pipes
are not installed, plug both ends with clean cloth
or paper to prevent dirt from entering the pipes.
Dirt in the pipes can cause fuel injection pump
malfunction.
PRIMING FUEL SYSTEM
Typical diesel fuel systems require priming to
remove pockets of air in the fuel lines and fuel
components. This is usually required after running
out of fuel, changing fuel filter elements or
repairing a fuel system component. Air in the fuel
system prevents smooth engine operation.
This fuel system however is self-priming. The
return line comes from the top of the injector
which causes all air to escape through the return
line.
