ABSTRACT
Heavy duty tasks such as engine replacement and dropping, involves engine rebuilds or upgrades, repairs, engine bay rehabs, and other complex operations that involves the movement of heavy engine parts in the workshop from one place to another. The entire process usually takes time depending on the hoisting device employed. For example, chain hoist requires more time with human efforts for support and can only carry limited engine weight capacity, whereas, hydraulic hoist can carry heavier engine than chain hoist and electrical hoist. However, Electrical hoist can handle engine weight of about 200Kg (approximately 2KN) but with greater speed than chain hoist and hydraulic hoist. In this paper, three design concepts were considered for hoisting Robin Hood engine and gear box which is about 193Kg and the second concept which operates electrically was selected in terms of performance, cost, interaction, safety and ergonomics. The design efficiency obtained was 66.7% and the final engine hoisting design concept selected met all the requirements including tilting capacity of up to 30 degrees.
