What is necessary when raising machinery for repairs?

When raising machinery for repairs, securely blocking the machinery is crucial for ensuring safety. Blocking provides a stable support system that prevents the machinery from accidentally falling during maintenance activities. This is essential not only for the safety of the personnel involved but also for protecting the equipment from damage.

When machinery is elevated, it can shift or tumble if not properly supported, leading to possible injuries or accidents. Therefore, securely blocking the machinery allows workers to perform repairs with assurance that the equipment remains in a fixed position, thus facilitating a safer work environment.

While using a hoist is a common practice for lifting heavy machinery and disconnecting the power source is important for electrical safety, blocking is the primary safety measure that directly addresses the risk of movement during repairs. Having a safety observer can provide an additional layer of oversight, but it does not replace the necessity of securely blocking the machinery.