Terex TR60 Maintenance Manual page 273

MAINTENANCE
Refer to Section 210-0000, COOLING SYSTEM for
recommended preventive maintenance procedures,
service intervals and coolant selection procedures.
Internal Cleaning - Water Tubes
If scale deposits are present inside the water tubes of
the radiator, it is necessary to use a suitable scale
remover such as 'Powdered Scale Solvent', or
equivalent. This material is a free-flowing powder,
inhibited to prevent attack on the cooling system
materials.
WARNING
Take care to avoid contact of skin or eyes with
the solvent. If contact is made it should be
washed off immediately with clean water and
medical advice should be taken.
For general cleaning use it is recommended to use a
concentration of 50 - 100 kg/m³ of water at a
temperature of up to 60° C. Rapid circulation or
agitation with compressed air will reduce the time for
cleaning.
Note: If scale deposits within the radiator are
exceptionally heavy, concentrations up to 200 kg/m³
may be used.
The most convenient method of use is to prepare a
concentrated solution by mixing the powder in hot
water in a tank and then adding the concentrated
solution to water contained in the radiator.
Note: The solvent must always be added carefully to
water, not water to solvent.
External Cleaning
Note: If a build up of dirt is apparent during routine
inspection, the following cleaning procedure should
be adopted.
WARNING
To prevent possible injury when using
compressed air or steam jet, wear adequate
eye protection and do not exceed pressure
values stated.
SM 1588 Rev 1 1-00
Cooling System - Radiator, Header Tank and Mounting
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1. Direct a steam jet at 100 - 300 kN/m², or
compressed air at 500 - 700 kN/m² on to the faces of
the radiator core assembly.
2. Liberally brush a liquid detergent on to those
surfaces which were not satisfactorily cleaned at
step 1. Leave to soak for at least 1 hour.
3. Apply a high pressure steam jet at 100 - 300 kN/
m², or compressed air at 500 - 700 kN/m² on to the
treated surfaces, forcing the fouling material out from
the radiator core assembly.
4. Leave radiator core assembly to dry before
reinstalling the cooling equipment.
Note: In the case of grossly fouled surfaces which
are not cleaned adequately in steps 1 through 4, the
following procedure may be used.
5. Ensure that the radiator core assembly is dry.
6. Liberally brush on to both sides of the radiator core
assembly an emulsifying cleaner such as 'Gunk', or
equivalent, and leave to soak for at least 1 hour.
7. Apply a high pressure steam jet at 100 - 300 kN/m²,
or compressed air at 500 - 700 kN/m² on to the treated
surfaces, from several different angles, forcing the
fouling material out from the radiator core assembly.
8. For surfaces with stubborn deposits, it may be
necessary to repeat steps 5 through 7, brushing the
surfaces between stages using a stiff bristle brush.
9. Leave radiator core assembly to dry before
reinstalling the cooling equipment.
SPECIAL TOOLS
There are no special tools required for procedures
outlined in this section. Refer to Section 300-0070,
SERVICE TOOLS, for part numbers of general
service tools required. These tools are available from
your dealer.
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Section 210-0040
7