For testing a newly designed ship's steering gear, a steering gear test bench with a steering gear to be tested and a load generation part should be prepared. The load given to the steering gear has to be pertinent to the load generated in a targeted ship. In this study, the authors suggest a process of estimating the load given to steering gears in ships. At first, a test for measuring the load in the steering gear of a real ship was conducted. Then, a process was developed to compute rudder driving torque and force by using basic equations including some empirical equations on ship's steering. The test results and the computation results on the load in the steering gear were compared, As a result, the process suggested in this study for estimating load in ship's steering gears was verified.

The existing dismantling and fitting tool of the lead sleeve in fuel injection pump in the laboratory is taken as the research object, aiming at its shortcomings or problems like the limited scope of application, the laborious operation, the hidden danger of personnel injury and so on. Starting from the design requirements of the special tool for the dismantling and fitting of the lead sleeve in the marine fuel injection pump, a special tool for disassembling and assembling of the lead sleeve of the injection pump is designed by using the graphic design software AutoCAD2014, and the working principle and the main components of the tool are introduced. Finally, from the aspects of technique, operation, maintenance, economy and so on, the feasibility of the special tool for the dismantling and fitting of the lead sleeve in the fuel injection pump was taken analyzed.