Hagie 204SP, Operator'S Manual, Page: 83 / 127

8-6
SECTION 8 –
MAINTENANCE AND STORAGE
A 50/50 ethylene glycol and water mixture
is a conservative mixture, which allows
protection against both overheating and
freezing.
NOTE: If a stronger antifreeze mixture is
required, ensure not to exceed the
engine manufacturer’s guidelines for
antifreeze-water mixing.
The following Ethylene Glycol Table gives
a few examples of ethylene glycol antifreeze/
water mixture protection values.
Coolant concentration should be checked
every 500 hours of operation or at the
beginning of each season, whichever occurs
first. A refractometer should be used to check
concentration.
NOTE: “Floating Ball” type density testers
are not accurate for use with a heavy
duty diesel cooling system.
Changing Coolant
Coolant should be changed periodically to
eliminate the buildup of harmful chemicals.
Drain and replace coolant every other
detasseling season or 1,000 hours of
operation, whichever occurs first. Refill with
soft water only, as hard water contains
minerals, which break down the anti-
corrosion properties of the antifreeze.
Further Information
Refer to the engine manufacturer’s
operation manual for further information.
Engine Fuel
Ethylene Glycol
40%
-23
°
C -10
°
F
50%
-37
°
C -34
°
F
60%
-54
°
C -65
°
F
Radiator Cap
(Located behind the operator’s station)
-Typical View
CAUTION
COOLING SYSTEM REQUIRES
SPECIAL FILL PROCEDURE
• Open cab heater water valve by turning the
cab temperature selector knob to “Heat”
with ignition on.
• Open both cab heater valves on engine.
• Fill radiator to bottom of fill neck using
50/50 EG coolant mixture.
• If radiator is drained completely and
refilled faster than 3 gpm (11.4 l/min),
radiator may need to be topped off.
• Run engine at operating temperature for 5
minutes.
• Shut off engine.
• Wait until coolant is below 122
°
F. before
removing cap to check coolant level.
• Top off cooling system if required.
CAUTION
DIESEL FUEL CAN BE DANGEROUS
• Turn off engine before refueling.
• Do not smoke while refueling.
• Clear off any spilled fuel after refueling.