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YWLA Series Delayed Electro-Hydraulic Drum Brakes
Delayed electro-hydraulic drum brakes can be extensively used on large/middle outdoor cranes, having excellent deceleration braking and storm braking performance. It can also be used on large and middle special cranes, realizing stable deceleration braking and maintenance braking. Ideal braking performance of these series products is also represented on Belt transport vehicles.

■The YWLA series brake is a delayed braking device (the delay time can be adjusted within 1~30 seconds), with bigger braking torque. Its function is the same as YWL, but don't have the first step braking. Emergency braking electromagnetic valve can be installed if needed which can realize emergency braking by handling it to make non-delay close when working machines are attacked by storm suddenly.  The dimension and braking torque parameters of this series brakes comply with JB/T6406-2006 and DIN15435 standard, ED series thrusters which comply with DIN15430 standard are adopted.

Main Design Features:
■Interlocking shoe clearance balancing device (patented technology) and shoe auto-aligning device constantly equalize the clearance of brake shoes on both sides and make adjustment unnecessary, completely avoiding brake lining one side sticking to brake wheel.
■At main hinge points are equipped with self-lubricating bearings, which make higher efficiency of transmission and longer performance life, and lubricating is unnecessary during the course of operation.
■Brake spring is arranged inside square tube and surveyor's rod is placed on one side. It is easy for customers to read braking torque value and then avoid the troubles of measuring and computing.
■Brake lining is of card whole piece shaping structure, which is easy and quick to replace. Brake lining of various materials such as half-metal (non-asbestos) hard and half-hard, soft (include asbestos) substance are available for customer to choose.
■Our company's new types of thrusters are adopted, which work acutely and have long life.

Options:
■Hand released lever.
■Release (open) or close limit switch, which indicates whether brake is properly released or closed and provides interlocking protection.
■Lining-wear limit switch, which indicates signals when wear of lining reaches the limit (Note: self-compensator should be equipped in application) and provides interlocking protection.
■Wear-self-compensation device, which realizes endless self-compensation of shoe clearance and torque when lining wears