5-8 OM 28Z3 US – Edition 2.0 * * 28Z3b510.fm
Maintenance
5.4 Engine and hydraulics cooling system
The hydraulic fluid cooler and engine coolant radiator are located in the engine compart-
ment next to the engine. The cooling system maintains the optimum operating temperature
in the hydraulic work and propulsion systems as well as the diesel engine.
Checking / filling up coolant
NOTICE
Improperly maintaining the cooling system can cause engine damage.
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Dirt on the radiator fins reduces the cooler's heat dissipation capacity.
• Clean the outside of the radiator at regular intervals. Use oil-free com-
pressed air (2 bar = 29 psi max.) to clean. Maintain distance from the radi-
ator to avoid damage to the radiator fins. Refer to the maintenance plans
for the cleaning intervals.
• In dusty or dirty work conditions, clean more frequently than indicated in
the maintenance plans.
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An insufficient coolant level reduces the heat dissipation capacity as well
and can lead to engine damage:
• Check the coolant level at regular intervals. Refer to the maintenance
plans in the appendix for the intervals.
• If coolant must be added frequently, check the cooling system for leaks
and/or contact your dealer.
• To avoid potential mechanical damage to the system, do not add cold
water or coolant to the engine radiator unless the system components are
cool.
• After filling the expansion tank, make a test run with the engine and check
the coolant level again after switching off the engine.
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The use of the wrong coolant can destroy the engine and the cooler.
• Add enough antifreeze compound to the coolant – but never more than 50
%. If possible use brand-name antifreeze compounds with anticorrosion
additives.
• Observe the coolant compound table – see chapter 6.10 Coolant com-
pound table on page 6-5.
• Do not use cooler cleaning compounds if an antifreeze compound has
been added to the coolant – otherwise this causes sludge to form, which
can damage the engine.
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Follow the procedure below after filling the expansion tank:
• Test run the engine.
• Stop the engine.
• Let the engine cool down.
• Check the coolant level again.
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Never add cold water/coolant if the engine is warm!
Environment!
Use a suitable container to collect the coolant as it drains and dispose of it in an environ-
mentally friendly manner!
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