Replace fan belt.
Drain sludge from fuel
SLUDGE
tank. See Section 7-7.
Blow out or vacuum inside. During
heavy service, clean monthly.
Replace fuel lines and clamps on
in-line booster fuel pump.
7-2. Maintenance Label For Isuzu Engine
FUEL
Check valve
clearance.*
500 h
Change coolant and
flush radiator. See
Section 7-11.
Repair or replace
cracked cables.
800 h
1000 h
OR
2000 h
Change radiator coolant
and hoses. See Section
7-11.
OM-4408 Page 25