Small sprinkler is a kind of vehicle used in landscaping, road cleaning and other fields, and its maintenance knowledge mainly includes the following aspects:

Electrical system maintenance: The electrical system of the small sprinkler includes power supply, motor, controller, etc., which needs regular inspection and maintenance to ensure the normal operation of the electrical system.

Mechanical system maintenance: The mechanical system of the small sprinkler includes the engine, transmission system, hydraulic system, etc., which needs regular inspection and maintenance to ensure the normal operation of the mechanical system.

Antifreeze system maintenance: the antifreeze system of the small sprinkler includes coolant, cooler, etc., which needs regular inspection and maintenance to ensure the normal operation of the antifreeze system.

Spray system maintenance: The spray system of the small sprinkler includes the sprinkler head, spray pipe, etc., which needs regular inspection and maintenance to ensure the normal operation of the spray system.

To sum up, the maintenance knowledge of small sprinklers includes electrical system maintenance, mechanical system maintenance, antifreeze system maintenance and spray system maintenance, etc., which need regular inspection and maintenance to ensure the normal operation of small sprinklers.