An elevator installation and a method for lubricating bearings in an elevator hoist machine of the elevator installation ensure that during start-up and subsequent running of the elevator hoist machine the bearings are provided with a mixed film lubrication or an elastohydrodynamic lubrication to optimize bearing life expectation.

Brake systems, vehicles having such brake systems, and methods of operating and installing the brake systems on vehicles. Such a brake system operates one or more brakes to reduce the speed of the vehicle through the operation of a brake pedal. The system includes a hydraulic circuit functionally coupled to the one or more brakes and configured to apply a braking force with the brake(s) that is in relation to a change in pressure of hydraulic fluid within the hydraulic circuit, and an air circuit functionally coupling the brake pedal to the hydraulic circuit. The air circuit is configured to convert manual actuation of the brake pedal to a change in the pressure of the hydraulic fluid within the hydraulic circuit and thereby apply a braking force in relation to a degree of actuation of the brake pedal.

A winch brake device that is used for a work machine and generates a braking force on the basis of a brake manipulation, includes a pressing member that brings braking members into pressure contact with each other to generate the braking force, a first brake cylinder that applies a first pressing force for bringing the braking members into pressure contact with each other to the pressing member, and a second brake cylinder that applies a second pressing force different from the first pressing force to the pressing member. The first brake cylinder and the second brake cylinder are capable of applying the first pressing force or the second pressing force independently of each other.