Relay maintenance block is a special hydraulic equipment customized for the relay overhaul of hydroelectric power plant, this equipment can remove the relay, install it, and can transport the relay from the foundation pit, transport in, the relay maintenance pulley has the centering function, the pulley bracket has the lifting function, the relay can realize the movement of the relay on the track under the effect of traction, the maximum load of the relay maintenance pulley is 40 tons, it is composed of a guide rail, a pulley, an adjusting device.

• The relay maintenance block can remove the relay and install it;
• The pulley guide rail has the function of centering adjustment;
• The pulley bolster has a lifting function;
• The rated load is 40 tons.