Clarke C32H User Manual

35
coolant temperature sensor monitors coolant
temperature and will set an alarm at 210º F (103º C).
3.4.2 Engine Coolant
The following information is provided as a guide for
Caterpillar Engine users in the selection of a suitable
coolant.
The water/ethylene glycol/inhibitor coolant mixture
used in Caterpillar engines must meet the following
basic requirements:
 Provide for adequate heat transfer.
 Provide protection from cavitation damage.
 Provide a corrosion/erosion-resistant
environment within the cooling system.
 Prevent formation of scale or sludge deposits
in the cooling system.
 Be compatible with engine hose and seal
materials.
 Provide adequate freeze and boil over
protection.
WARNING
A water and anti-freeze solution is required for
pump installations. Premixing this solution prior to
installing is required. This prevents possible pure
anti-freeze chemical reactions to block heater
elements which can burnout the element. Please see
the I&O section (see Page 5) for proper cooling
system capacities of each model.
3.4.3 Water
Water can produce a corrosive environment in the
cooling system, and the mineral content may permit
scale deposits to form on internal cooling surfaces.
Therefore, inhibitors must be added to control
corrosion, cavitation, and scale deposits.
Chlorides, sulfates, magnesium and calcium are among
the materials which make up dissolved solids that may
cause scale deposits, sludge deposits, corrosion or a
combination of these. Chlorides and/or sulfates tend to
accelerate corrosion, while hardness (percentage of
magnesium and calcium salts broadly classified as
carbonates) causes deposits of scale. Water within the
limits specified in the following table is satisfactory as
an engine coolant when properly inhibited. Use of
distilled water is preferred.
Materials
Milligram
per Liter
Grains
per
Gallon
Chloride (Max.)
40
2.
4
Sulfates (Max.)
100
5.
9
Total Dissolves Solids
(Max.)
340
20
Total Hardness (Max.)
170
10
3.4.4 Coolant Capacities
Ethylene Glycol or Propylene Glycol are acceptable:
IMPORTANT:
Do not use cooling system sealing additives or
antifreeze that contains sealing additives.
Do not mix ethylene glycol and propylene glycol base
coolants.
Use an ethylene glycol coolant (low silicate
formulation) that meets the standard of ASTM E1177
or propylene glycol that meets ASTM D6210
requirements. Use of propylene glycol requires
addition of CAT SCA (Supplemental Coolant
Additive) to prevent liner cavitation.
A 50% coolant water solution is recommended. A
concentration over 70% is not recommended because
of poor heat transfer capability, adverse freeze
protection and possible silicate dropout.
Concentrations below 30% offer little freeze, boil over
or corrosion protection.
IMPORTANT
Never use automotive-type coolants (such as those
meeting only ASTM D3306 or ASTM D4656).
These coolants do not contain the correct additives
to protect heavy-duty diesel engines. They often
contain a high concentration of silicates and may
damage the engine or cooling system.
ENGINE
MODEL
COOLANT
CAPACITY
QUARTS (LITERS)
C32H-All Models 83 (78.5)
3.4.5 Coolant Inhibitors
The importance of a properly inhibited coolant cannot
be over-emphasized. A coolant which has insufficient
or no inhibitors at all, invites the formation of rust,
scale, sludge and mineral deposits. These deposits can

Clarke C32H Specifications

General

Brand	Clarke
Model	C32H
Category	Engine
Language	English