Abstract: A cleaning apparatus for selectively applying cleaning foam, cleaning water and compressed air toward a working surface includes a housing incorporated with a mixing pump having inlet manifold and outlet port thereon. Water and compressed air sources are connected to said inlet manifold of the mixing pump, and a cleaning agent tank is arranged in the housing and interconnected to said inlet manifold of the mixing pump so as to create cleaning foam when needs. Wherein cleaning foam, clear water and compressed air can be selectively output during a cleaning cycle so as to economically perform the cleaning process.

Abstract: An oil changing unit comprises a base having a disk configuration and forming a socket at a center thereof. The base further includes a manifold block thereunder and a first circular ridge formed on the base and surrounding said socket and a second circular ridge formed on a peripheral of the base. A first tube is securely assembled to the socket and having an orifice in a wall thereof. A first cylinder is attached to the first circular ridge and encloses the first tube therein. The first cylinder includes a first lid enveloped and secured onto the first tube and tightly sealing an upper end thereof such that the orifice of the first tube is located within the first cylinder. A second cylinder is attached to the second circular ridge and encloses the first tube therein and includes a second lid enveloped and secured onto the first tube and tightly sealing an upper end.

Abstract: An oil replacement assembly includes a housing in which a plurality of circuits and gauges are incorporated therein. An inner one-way valve is arranged between a first connecting port and a third connecting port of a 9-way valve, while a second inner one-way valve is arranged between a second connecting port and a fourth connecting port of the 9-way valve. An eighth connecting port of said 9-way valve is connected to the first connecting port, and is further connected to a dual-3-way valve. A fifth connecting port and a second connecting port are connected to another port of the dual-3-way valve, while another port of the dual-3-way valve is connected to a sixth connecting port of the 9-way valve. Wherein when the first connecting port and the second connecting port are incorrectly connected, contaminated oil received in the second connecting port will be redirected back to the first connecting port.

Abstract: An oil replacement assembly includes a housing in which a plurality of circuits and gauges are incorporated therein. An inner one-way valve is arranged between a first connecting port and a third connecting port of a 9-way valve, while a second inner one-way valve is arranged between a second connecting port and a fourth connecting port of the 9-way valve. An eighth connecting port of said 9-way valve is connected to the first connecting port, and is further connected to a dual-3-way valve. A fifth connecting port and a second connecting port are connected to another port of the dual-3-way valve, while another port of the dual-3-way valve is connected to a sixth connecting port of the 9-way valve. Wherein when the first connecting port and the second connecting port are incorrectly connected, contaminated oil received in the second connecting port will be redirected back to the first connecting port.