The rated power generated from the engine of a heavy duty vehicle can only become useful when effectively transmitted from the engine via the fly wheel to the transmission system of the truck and finally to the final drive. The propeller shaft or the drive shaft which is the mechanical component used for transmitting torque and rotation is used in transmitting these generated power to the final drive.
However, when the Ghana Armed Forces introduced the Chinese made Dong Feng trucks which are five ton troop carrying vehicles (TCVs) for its operations, their propeller shafts recorded a high rate of failure. This inevitably affected the morale of troops and the operations of the Ghana Armed Forces. Some drivers of the truck fearing the propeller shaft failure could result in accident, hanged nylon rope or chain under the trucks to prevent a failed shaft from striking the ground. Below are pictures to that effect.
This project therefore aims at identifying the causes of the failures of propeller shafts and recommend mitigating measures to them.
Fig.1.1 Nylon Rope Beneath the Propeller Shaft
The objectives of this project work are:
•To identify the causes of propeller shaft failure of heavy duty trucks at the Base Workshop. •To recommend mitigating and preventive measures to the problems.
It is anticipated that the findings of this project will bring to the knowledge of truck owners and users especially the Ghana Armed Forces the causes of propeller shaft failures and recommended measures to prevent them from occurring.
The methods to be adopted include:
•Visit to the Dong Feng Base Workshop, Burma – Camp.
•Consultation with Lecturers at the Mechanical Engineering Department of UMaT, Tarkwa. •Data collection and analysis.
1.5Facilities Used for the Research
The facilities to be employed include:
•The Base Workshop.
•Relevant literature review.
•Library facilities at UMaT.
•Internet facilities at UMaT.
1.6Scope of work
This project is limited to investigations into the causes of propeller shaft failures on Dong Feng trucks at the Base Workshop, Burma-Camp, Accra, Ghana.
This project work is organized into four chapters as follows: Chapter one consists of the statement of the problem, objective, methods used, research facilities used, justification of the project objectives, scope of work and work organization. The second chapter introduces relevant information about Base Workshop by way of an overview and some department at the Base Workshop and their maintenance procedure.
The third chapter gives a brief introduction to the truck and its technical data, detailed description of power train system and a general overview of the propeller shaft universal joint,General Causes of Propeller Shaft Failure and Mitigating Measures carried out in this chapter.
Chapter four will dealInvestigation at the Base Workshopinto the causes of propeller shaft failure, Outcome of the Investigation, conclusions and recommendations.
RELEVANT INFORMATION ABOUT BASE WORKSHOP (B/WKSHP)
After the first and second world wars, the Army thought of forming a workshop to undertake repair work in the Army. In 1946, a nucleus workshop was formed and located at Bubuashie at Accra to undertake the repairs of the Royal West African Frontier Force’s (RWAFF) weapons and equipments. Later it moved to a new site at United Africa Company (UAC) Workshop, opposite Accra Railways Station. In 1950, it was designated as No. 1 Station Workshop, West Africa Electrical and Mechanical Engineering (WAEME) and moved to a new location at Duala barracks, Giffard Camp, now Burma Camp. In 1952, the No. 1 Station Workshop was re - designated as No.4 Command Workshop with 300 military and civilian personnel. As a...