Operation and Maintenance Manual SC9DF Electronically Controlled Diesel Engine for Agricultural Equipment
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Lube oil of CH-4 15W-40 is recommended for most areas and lube oil of CH-4 10W-40 for the areas where ambient
temperatures are below -15℃.
Having very good cold starting quality, lube oil of CH-4 5W-50 is recommended for the engines being operated in
freezing cold areas with ambient temperatures below -23 ℃ all the time and not being provided with warm protection
after each operation.
△Caution: Although it is easy for starting engine, low viscosity oil facilities wear. Continuous use of it will
shorten engine service life; which shall be avoided or limited.
△Caution: Use of lube oil with bad quality will cause much high oil consumption, early wear, or even piston
scuffing.
△
Caution: To ensure good lube oil performance during engine operation, the dedicated lube oil provided by
SDEC for the D series engine is recommended.
△Caution: Do not extend the oil replacement interval, or it can affect the service life of the engine due to
corrosion, carbon deposit and abrasion.
2.5.3 Coolant
In order to ensure normal operation and long service life of the engines, use SDEC- designated special organic
coolant (anti-freezing type) for any climate. The coolant is proved to be of antifreeze, anticorrosion, good thermal
conductivity, performance stability, and environmental friendliness.
Name Part No.
Freezing point/℃ Boiling point/℃
SDEC-designated special organic coolant F/LQY-45 -45 108
If using other branded antifreeze liquid, or the mixture of water and ethyleneglycol, the contents of silicate (sodium
silicate anhydrous), oxide and acetic acid shall not exceed 1,000 ppm, 5 ppm and 100 ppm respectively, or there may
produce scale on parts of the cooling system, causing block at the radiator and leakage at the water pump sealing
ring.
Adjusting the ratio of water and ethylene glycol can get antifreeze liquids of different ice points, i.e. freezing points. In
general, the ice point of selected antifreeze liquid shall be about 10℃ lower than the lowest temperature of the area
where the engine is used. For most climates, relation of volume ratio and freezing point of ethylene glycol and water
as follows:
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