Predicting Repair and Maintenance Costs for Five Tractor Makes in the Gezira Scheme (Sudan)

Lotfie A. Yousif and Shaker Babiker Ahmed
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Lotfie A. Yousif: Agricultural Research Corporation (ARC), Agricultural Engineering Research Program, Wad Medani, Sudan
Shaker Babiker Ahmed: Department of Agricultural Engineering, Faculty of Agriculture, Omdurman Islamic University, Sudan

International Journal of Research and Scientific Innovation, 2025, vol. 12, issue 4, 366-375

Abstract: Many tractor makes of two-wheel drive (2WD) types are working in the Gezira irrigated agricultural scheme, Sudan. Private individual farmers own most of them. However, information regarding their repair and maintenance costs are insufficient. Moreover, depending on information on repair and maintenance costs from other farming systems or countries is unrealistic. The objectives of this study were to develop power mathematical model to predict repair and maintenance costs for tractors make and their general model for tractors owned by individual private farmers in the Gezira irrigated scheme. The required data was obtained through structured questionnaire. The collected data included tractor make, model and initial purchase price, in addition, to tractor’s annual repair and maintenance expenses. Moreover, the annual working hours for tractors were calculated. Five tractors make were studied; namely Massey Ferguson (MF 290), New Holland (TT 75), Hattat 290, Tafe 8502 and John Deere (JD 5075E). Power models were developed for these tractors make and their general model. The results showed that there was strong and highly significant correlation between annual repair and maintenance cost as percentage of purchase price (y) and annual hours of use (x). The coefficients of determination (R2) were between 0.85 and 0.99 and the significance levels (P) were (P

Date: 2025
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