| 摘要 |
Apparatus and method for cleaning heat exchangers when overhauling transmissions or the like wherein the inlet and outlet of a heat exchanger is disconnected from the transmission and connected to a source of solvent, oil and air. Solvent is first injected into the heat exchanger in a direction reverse to the normal flow of oil through the heat exchanger. This injection of solvent is stopped, then started again after a predetermined delay time. This injection and delay cycle may be repeated. Air is now injected under pressure into the heat exchanger in a direction reverse to the flow of oil therethrough, i.e. in the same direction as the solvent injection. Thirdly, oil is injected into the heat exchanger in the normal direction of flow of oil therethrough for a predetermined time. This injection of oil is stopped for a predetermined period of time. The injection and delay cycle for oil injection may also be repeated. Air is then injected under pressure through the heat exchanger in the normal direction of flow of oil therethrough. The cleaned and flushed heat exchanger may now be reconnected to the transmission.
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