02
.0
8.
GB
F 8
7
Coolant specification
The quality of the coolant used can have a major impact on the efficiency and service
life of the cooling circuit. The recommendations listed below are useful for servicing
a good cooling circuit with anti-freeze and/or anti-corrosion.
Always use clean, soft water.
If anti-freeze is not necessary, it is still advantageous to use an approved anti-freeze
mixture as this offers protection against corrosion and increases the boiling point of
the coolant. A minimum concentration of 25% anti-freeze is necessary, however we
recommend a 50% concentration.
– If an anti-freeze solution is used to prevent frost damage, it must be ethylene-glycol
based. An anti-freeze agent below the stated norm or which corresponds to a
similar one is acceptable if the pH value ranges from 7.0 - 8.5.
– When using an anti-freeze agent, note the correct mixture of anti-freeze and water.
The anti-freeze must comply in full with the above standards.
The quality of the anti-freeze must be checked at least annually, e.g. at the start of
the cold season.
If the correct procedures are not applied, the manufacturer cannot be held liable for
frost or corrosion damage.
F
Anti-freeze contains ethylene-glycol and other components which are poisonous if
swallowed and can be absorbed in poisonous quantities through persistent, repeated
contact with the skin.
U.S.A. ASTM D4985 or SAE J1941
Ethylene—glycol based motor coolant
Lowest temperature
required for protection
% volume of anti-freeze
Volume ratio
of anti-freeze:
water
-37°C
50
1:1
02
.0
8.
GB
F 8
7
Coolant specification
The quality of the coolant used can have a major impact on the efficiency and service
life of the cooling circuit. The recommendations listed below are useful for servicing
a good cooling circuit with anti-freeze and/or anti-corrosion.
Always use clean, soft water.
If anti-freeze is not necessary, it is still advantageous to use an approved anti-freeze
mixture as this offers protection against corrosion and increases the boiling point of
the coolant. A minimum concentration of 25% anti-freeze is necessary, however we
recommend a 50% concentration.
– If an anti-freeze solution is used to prevent frost damage, it must be ethylene-glycol
based. An anti-freeze agent below the stated norm or which corresponds to a
similar one is acceptable if the pH value ranges from 7.0 - 8.5.
– When using an anti-freeze agent, note the correct mixture of anti-freeze and water.
The anti-freeze must comply in full with the above standards.
The quality of the anti-freeze must be checked at least annually, e.g. at the start of
the cold season.
If the correct procedures are not applied, the manufacturer cannot be held liable for
frost or corrosion damage.
F
Anti-freeze contains ethylene-glycol and other components which are poisonous if
swallowed and can be absorbed in poisonous quantities through persistent, repeated
contact with the skin.
U.S.A. ASTM D4985 or SAE J1941
Ethylene—glycol based motor coolant
Lowest temperature
required for protection
% volume of anti-freeze
Volume ratio
of anti-freeze:
water
-37°C
50
1:1
Summary of Contents for DFG 425
Page 1: ...Operating Instructions 52025727 DFG TFG 425 430 435 G 07 04 02 08 ...
Page 3: ......
Page 5: ...0108 GB 0108 GB ...
Page 9: ...0106 GB I 4 0106 GB I 4 ...
Page 11: ...0104 GB A 2 0104 GB A 2 ...
Page 27: ...0207 GB B 16 0207 GB B 16 ...
Page 31: ...0704 GB C 4 0704 GB C 4 ...
Page 77: ...0106 GB E 42 0106 GB E 42 ...