JCB EcoMAX Engine Installation Manual
© JCB Power Systems Ltd. 320/A9164-1 Page 13 of 64
3. Cooling System
WARNING
The cooling system is pressurised when the coolant is hot. Hot coolant can spray out on removal
of the cap when the coolant is hot with the risk of causing burns injuries; ensure that the engine
is cool before working on the cooling system.
WARNING
Antifreeze can be harmful. Obey the manufacturer’s instructions when handling full strength or
diluted antifreeze.
WARNING
Do not work on the cooling pack while the engine is running. There are rotating parts in the
vicinity of the cooling pack that can cause injury. Ensure that the engine cannot be started when
the fan and FEAD guarding are removed for the purpose of working on the cooling system.
CAUTION
Fans are a significant source of Off-Highway equipment noise.
3.1 Introduction
With an IPU the JCB EcoMAX engine is cooled using the supplied liquid cooling system to
maintain the correct operating temperature. The engine installer must ensure the cooling
performance of the unit is maintained when installed in the finished equipment. There are
maximum limits for coolant and lubricating oil temperature which must not be exceeded. See
the Technical Data Sheet for specific values.
The cooling pack is a combination cooler and incorporates both the radiator and charge air
cooler. The coolant expansion volume is incorporated within the moulded plastic header tank
which also has a filler neck fitted with a pressure control cap of 1 bar. The relief flow from the
pressure cap is routed down the side of the cooling pack. The engine installer should ensure
this is a safe position on the equipment or is routed to a separate reservoir and that good
access can be gained to fill the cooling system.
A port is available in the header tank for the fitment of an optional coolant level switch – it is
recommended that this is fitted. Particularly in static machine applications where the operator
may not always be available to shut the machine down should the unit loose coolant the
OEM should utilise this switch to automatically shut the engine down. .
IPUs are shipped from the factory without coolant and the engine installer must ensure that
the system is filled with coolant of a minimum concentration of 30% antifreeze/corrosion
inhibitor. Antifreeze and corrosion inhibitor must be ethylene glycol based to specification
ASTM D6210. Failure to use the correct specification and concentration of coolant could
invalidate warranty.
3.2 System Performance
The Cooling system is designed to provide a Limiting Ambient Temperature of 46
0
C
providing sufficient air flow is provided in the installed arrangement. The cooling system must
be tested during machine development and appraisal trials to ensure the required LAT is
achieved for the most onerous machine duty and operating environment. To ensure cooling
performance is achieved canopy/enclosure design and machine components should be such
that the air flow through the cooling pack isn’t restricted and canopy depressions don’t
exceed the figures stated on the technical data sheet. Canopy design should also be such
that recirculating air can’t occur.
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