Detroit Diesel 60 Series Operator's Manual page 38

ings and brackets. At the same time,
check the seal in the fuel tank cap, the
breather hole in the cap and the condi-
tion of the flexible fuel lines. Repair or
replace the parts, as necessary.
NOTICE:
Galvanized steel fuel tanks, fittings, or
supply lines should never be used
because the fuel oil reacts chemically
with the zinc coating to form powdery
flakes which can quickly clog the fuel
filters and damage the fuel pump and
injectors.
Item 3 — Fuel Lines, Flexible Hoses
Pre-Start Inspection—Make a visual
check for fuel leaks at all engine-mount-
ed fuel lines and connections, and at the
fuel tank suction and return lines. Since
fuel tanks are susceptible to road haz-
ards, leaks in this area may best be
detected by checking for accumulation
of fuel under the tanks. Check hoses
daily as part of the pre-start inspection.
Examine hoses for leaks, and check all
fittings, clamps, and ties carefully. Make
sure that hoses are not resting on or
touching shafts, couplings, heated sur-
faces including exhaust manifolds, any
sharp edges, or other obviously haz-
ardous areas. Since all machinery
vibrates and moves to a certain extent,
clamps and ties can fatigue with age. To
ensure continued proper support,
inspect fasteners frequently and tighten
or replace them as necessary.
If fittings have loosened or cracked or
if hoses have ruptured or worn through,
take corrective action immediately.
Leaks are not only potentially detrimen-
tal to machine operation, but they can
also result in added expense caused by
the need to replace lost fluids.
CAUTION:
To avoid injury from fire, contain
and eliminate leaks of flammable
fluids as they occur. Failure to
eliminate leaks could result in fire.
Service life—A hose has a finite service
life. With this in mind, all hoses should
be thoroughly inspected at least every
500 operating hours (1,000 hours for
fire-resistant fuel and lubricating oil
hoses) and/or annually. Look for cover
damage and/or indications of twisted,
worn, crimped, brittle, cracked, or leak-
ing lines. Hoses with their outer cover
worn through or damaged metal rein-
forcement should be considered unfit for
further service.
All hoses in and out of machinery
should be replaced during major over-
haul and/or after a maximum of five
years of service. Fire resistant fuel and
lube oil hose assemblies do not require
automatic replacement after five years
service or at major overhaul, but should
be inspected carefully before being put
back into service.
Item 4 - Cooling System
CAUTION:
To avoid injury from the expulsion
of hot coolant, never remove the
cooling system pressure cap while
the engine is at operating temper-
ature. Remove the cap slowly to
relieve pressure. Wear adequate
protective clothing (face shield or
safety goggles, rubber gloves,
apron, and boots).
28