EATON Airflex WSB 11210 WCSB3 Installation Operation and Maintenance E-CLCL-11001-E October 2013
14
WCSB3 Brakes
Table 10
Maximum Outlet Coolant Temperature
Water/
Maximum
Maximum
Ethylene Inlet
Outlet
Maximum Minimum
Glycol Coolant Coolant Ambient Ambient
Mixture % Temperature Temperature Temperature Temperature
Size
by Volume °F (° C)
°F (°C)
°F (°C)
°F (°C)
36WCSB3 100/0
100 (38)
150 (66)
110 (43)
0 (-18)
36WCSB3 50/50
100 (38)
170 (77)
110 (43)
0 (-18)
2.4.11 Using flexible connecting hose to each tensioner
coolant section will allow axial travel of the pressure
plate (116), reaction plate (30) and end plate (117)
during tensioner operation without restricting the
movement of components. When determining hose
lengths, consideration should be given to movement
and location of the pressure plate and reaction plate
as friction material wears. Hose lengths running
between the manifolds and the inlet or outlet ports
should be equal in length, if possible. Reductions in
the recommended line diameter should be avoided to
prevent excessive line pressures.
Caution
Short or excessively rigid hoses may restrict proper
movement of the pressure plate and reaction plates.
2.4.12 Avoid the use of sharp bends and elbows that will
restrict water flow. Loops and bends in the lines may
create air pockets, which substantially reduce the
flow of coolant and can contribute to overheating.
2.4.13 Coolant and coolant supply lines should be free of
foreign material (a 500 micron water filter is
recommended). In the event that contaminated water
is used as a coolant (not generally recommended),
use of a multi-stage filter/strainer may be desirable to
avoid the need for frequent cleaning of fine mesh
filters.
2.4.14 Figure 5 illustrates a typical closed loop liquid to liquid
coolant system. The heat exchanger and temperature
control would be replaced with a radiator, fan and
motor in a liquid to air system
2.4.14.1 The schematic in Figure 5 illustrates a four disc
tensioner (436WCSB3). Eight coolant supply lines
feed the ports at the 3 o’clock and 9 o’clock position.
Eight coolant return lines drain or recirculate coolant
from the ports at the 12 o’clock and 6 o’clock
position. Reference Table 9 for the quantity of hoses
required for the 436WCSB3. Reference Table 6 for
the percentage flow required at the outlet for the
436WCSB3.
2.4.14.2 Figure 5 illustrates the supply lines & hoses and the
return lines & hoses are equal in length and flow
controls are located on the return lines to balance
flow.
2.4.15 The maximum coolant supply temperature at the
inlet should be 100°F (38°C) or lower. The coolant
outlet temperature should not exceed the values
given in Table 10. However, in no event should
there be more than a 50°F (28°C) temperature
rise between inlet and outlet. See Table 10 for
maximum allowable outlet coolant temperature with
various water/ethylene glycol mixtures and other
cooling media.
2.4.16 Open Loop Systems
2.4.16.1 For efficient operation of the WCSB3, an adequate
supply of filtered fresh water is required. Excessive
water hardness promotes the formation of scale
deposits, which in time, will affect the service life of
the WCSB3 unit. Water of high acidity or high in
corrosive salts may cause electrolytic corrosion
between the dissimilar metals used in the water
cavities. Water treatment should be considered if the
properties of the water exceed the following:
Equivalent calcium carbonate content hardness;
Maximum = 100 ppm.
pH value = 7.0 to 9.0
Caution
Open loop systems should be thoroughly flushed
with clean fresh water after operation to reduce the
corrosive effects of contaminants on internal
components.
2.4.17 Closed Loop Systems
2.4.17.1 For efficient operation of the WCBD3 in a closed
loop system, ethylene glycol coolant conforming
to SAE Standard J1034 should be used. For
preparation of the proper concentration of a water/
ethylene glycol mixture, use make-up water which is
low in corrosive ions such as chlorides and sulfates.
Recommended pH value of the water ethylene glycol
mixture is 7.5 to 10.5
3.0 OPERATION
3.1
Conditions of Operation
The following HAZARD Warnings shall be followed
for proper WCSB3 functioning.
Table 9
Quantity of Cooling Water Hoses Required
Quantity of
Quantity of
Description
Inlet Hoses*
Outlet Hoses**
Reaction Plate (30)
2
2
Pressure Plate (116)
2
2
Pressure Plate (116)
2
2
End Plate (117)
2
2
* Inlet hoses are located at the 3 o’clock & 9 o’clock position.
** Outlet hoses are located at the 12 o’clock & 6 o’clock position. Supply & Drain hoses must
have an ID equal to or larger than the port orifice.
