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78. An auxiliary diesel engine on your fishing trawler uses a starting system similar to the one shown in the illustration. The hand pump is capable of charging the accumulator to the pressure necessary to start the engine and the engine successfully starts. While running, the engine driven pump is not capable of maintaining the accumulator in a state of being fully charged. Which of the following is most likely to be the cause
The accumulator charges normally with the hand pump but not when the engine is running, indicating the engine-driven pump is not functioning. A broken drive belt would prevent the pump from operating, explaining the observed behavior.
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