When Engine Overheats; When Engine Must Be Stopped Immediately - Rayco Super Jr RG27 Operator, Service, Maintenance Manual

When engine overheats

Cause
Engine oil ►Check oil level. Refill as necessary
insufficient
Fan belt broken ►Change belt or adjust belt tension.
or elongated
Coolant insuf- ►Replenish coolant.
ficient
Excessive ►Add water only or change to coolant with the
concentration specified mixing ratio.
of antifreeze
Radiator net ►Carefully clean net or fin.
or fin clogged
with dust
Inside of radia- ►Clean or replace radiator and parts.
tor or coolant
flow route
corroded
Fan, radiator, ►Replace defective parts.
or radiator cap
defective
Thermostat ►Check thermostat and replace if necessary.
defective
temperature ►Check temperature with thermometer and
gauge or sen- replace if necessary.
sor defective
Overload ►Reduce load.
running
Head gasket ►Replace parts.
defective or
water leakage
Incorrect injec- ►Adjust to proper timing.
tion timing
Unsuitable fuel ►Use the specified fuel.
used

When engine must be stopped immediately

Cause
Engine revolu- ►Check the adjustments, injection timing, and
tion suddenly fuel system.
increases or
decreases
Unusual sound ►Check all moving parts carefully..
is heard sud-
denly
Color of ex- ►Check the fuel injection system, especially
haust suddenly the fuel injection nozzle.
turns dark
Bearing parts ►Check the lubricating system.
are overheated
Oil lamp lights ►Check the lubricating system.
up during ►Check to see engine bearing clearances are
operation within factory specs.
►Check the function of the relief valve in the
lubricating system.
►Check the pressure switch.
►Check the filter base gasket.
800.392.2686
Countermeasures
Countermeasures
RG27/35/37 Operation • Service • Maintenance
Service
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