Major Maintenance; Preventive Maintenance - Daewoo D1146 Maintenance Manual

2. Major Maintenance

2.1. Preventive Maintenance

The preventive maintenance means that the operator performs the servicing of engine
to obtain long life and best performance from DAEWOO diesel engine.
2.1.1. Cooling Water
Regarding the cooling water that is to be used for engine, the soft water not the hard
water must be used.
The engine cooling water can be used diluting it with antifreezing solution 40% and
the additive for rust prevention (DCA4) 3 ～ 5 %.
The density of above solution and additive must be inspected every 500 hours to
maintain it properly.
NOTE :
The proper density control of antifreezing solution and rust preventing
additive will be able to prevent the rusting effectively and maintain the stable
quality of engine. For the improper control might give the fatal damage to the
cooling water pump and cylinder liners, detail care is needed.
Since D1146, D1146TI and DE08TIS (diesel engine of D1146 series) cylinder liner is
dry type, particularly the cooling water control should be applied thoroughly.
The density of antifreezing solution and additive for rust prevention is able to be
confirmed by the cooling water test kit. (Fleetguard CC2602M or DAEWOO
60.99901-0038)
How to use the cooling water test kit
(1) When the cooling water temp. of engine is in the range of 10 ～ 55 °C,
loosen the plug for cooling water discharge and fill the plastic cup about a half.
NOTE :
In taking the cooling water sample, if the water in auxiliary tank were taken, it
is hard to measure the accurate density. Take the cooling water sample
necessarily loosening the cooling water discharge plug.
(2) At the state of a test paper soaked in the sampled water, after taking the paper
out through water agitation, shake off the water.
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D1146/D1146TI/DE08TIS
MAINTENANCE MANUAL
Printed in Jan. 2001 PS-MMA0415-E1A