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Installation and Maintenance Manual, Compact CA
3.1.9 Installation of MDA hydraulics
Activation time of brake.
Flushing of brake cylinder lines before start up of system is necessary to have a quick action of
the brake especially when used as a emergency brake, see example of flushing below.
For winch applications, hanging loads and other applications where quick activating times are
necessary sizing of return lines becomes important.
Higher viscosity, cold outside temperature, long drain lines and smaller tube diameters affects the
activation time of brake. This must be taken in to account when designing systems and where multi
disc brake MDA will be used. Please see figure 3.24.
Opening pressure
To secure correct opening pressure:
Use hydraulic scheduling according to figure 3.23 when using external pressure (system pressure)
as control pressure to open and close the brake.
Pressure reduce valve (set at 20 bar) and pressure relief valve (set at 25 bar) in line.
Air in the brake results in slow function. Vertical installation with motor shaft pointing upwards not
allowed.
The hydraulic connection must be on top of the brake, to avoid air. Air gives a slow function for
the brake.
Pressure reduce valve
Pressure relief valve
Figure 3.23
Installation
If the brake is used in cold environment
as emergency brake, it must be flushed.
Installed close to brake
Piping system to be heated
Figure 3.24
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