Abstract: A radiator cleaning device includes a fresh fluid tank for preserving fresh fluid to be filled into a radiator and a used fluid tank for collecting used fluid from the radiator. A discharge hose is releasably connected to an outlet of the radiator. The discharge hose is selectively connectable to the used fluid tank for discharging the used fluid into the used fluid tank. An intake hose is releasably connected to an inlet of the radiator. The intake hose is selectively connectable to the fresh fluid tank for receiving the fresh fluid therefrom. Pressure/vacuum generation units selectively generate a vacuum inside the used fluid tank to forcibly draw the used fluid from the radiator via the discharge hose and generates a pressure inside the fresh fluid tank to forcibly drive the fresh fluid from the fresh fluid tank into the radiator via the intake hose. The discharge hose is also selectively connectable to the intake hose by a three-way valve for circulating the used fluid to the intake hose.

Abstract: A power steering fluid refilling and draining device according to the present invention includes a frame mounting with a fresh fluid tank including an output pipe connected to a first three-way valve and a refilling port. The frame further houses a used fluid tank including a sucking pipe connected to a second three-way valve and a sucking port. A pneumatic pump is interconnected to the output pipe and the sucking pipe, respectively. Wherein when the pneumatic pump is operated, the fresh fluid will be delivered into a steering system with used fluid therein being sucked out by the sucking port simultaneously. Each of the fresh fluid tank and the used fluid tank is provided with a window.

Abstract: A pneumatically operated oil pump comprises an outer tube for extending into an oil tank and a sucking tube moveably arranged within the outer tube. The sucking tube includes one-way valve establishing an airtight arrangement with respect to an inner wall of the outer tube. An air operated device is arranged on top of the outer tube and interconnected to the sucking tube located within the outer tube. The device includes an upper operating chamber and a lower operating chamber intercommunicated with an air pipe. The device further includes a movement reciprocally moved within the device when compressed air is introduced into the device so as to move the sucking tube reciprocally.

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 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.