2.6.4 Engine coolant recommendation
In fluid-cooled engines, the cooling fluid must be treated and monitored to prevent engine damage.
Water quality:
An important factor for treating the cooling fluid is the correct water quality.
As a rule, clear and clean fresh water complying with the following analysis values must be used:
Feature
Value
pH value
6.5-8.5
Chlorine (Cl)
[lb/gal]
Max. 0.7
Sulphate (SO
4
)
[lb/gal]
Max. 0.7
Total hardness (CaCO
3
)
[mmol/l]
[ppm]
3.56
356
[°dGH]
356
[°e]
25.0
[°fH]
35.6
Tab. 36 Water quality parameters for cooling water
Contact the local water utilities for information about the water quality. If the water does not meet
the parameters above, it must be treated.
Coolant quality:
The coolant (cooling fluid) is treated by adding anti-freeze with corrosion protection additives on the
basis of ethylene glycol to the water.
The engine coolant must meet the requirements of specification ASTM D4985.
Do not use a common coolant and/or antifreeze that meets only the requirements of
ASTM D3306. Such coolants are intended only for light use in vehicles and could shorten the
useful life of the engine.
2.6.5 Fluid volumes
Description
Fluid volume [gal]
Engine oil
9.0
Fuel
170.0
Coolant
18.0
Tab. 37 Fluid volumes
2.6.6 Batteries
Feature
Value
Voltage [V]
24 (2 x 12)
Capacity [Ah]
2 x 80
2
Technical Data
2.6
Engine
No.: 901765 05 USE
Operator Manual Screw Compressor
M114 SIGMA CONTROL SMART
15
