First wash. The first cleaning of the hydraulic system of the Rexroth Rexroth hydraulic pump is carried out after the pre-installation (trial assembly of the pipes) and the dismantling of the entire pipeline.
The first cleaning should ensure that a large number of obvious metal burrs and powders, sand dust, paints, oxide scales, oil stains, cotton yarn, rubber particles and other dirt that may be cleaned off are all carefully cleaned. Otherwise, the first installation of the hydraulic system of the Rexroth Rexroth hydraulic pump is not permitted.
The first cleaning time varies depending on the size of the hydraulic system of the Rexroth Rexroth hydraulic pump, the required filtration accuracy and the degree of contamination of the hydraulic system of the Rexroth Rexroth hydraulic pump. When the predetermined cleaning time is reached, it can be determined whether the cleaning work is complete according to the type and quantity of impurities filtered in the filter.
The first cleaning is mainly to pickle the pipeline and clean the oil tank and various components. There are several methods of pipeline pickling.
1) Degreasing and initial washing. Remove the burrs on the tubing, degreasing (degreasing) with sodium hydroxide, sodium sulfate, etc., and then clean with warm water.
2) Pickling. After impregnation and cleaning in 20%-30% dilute hydrochloric acid or 10%-20% dilute sulfuric acid solution for 30-40min (the solution temperature is 40-60 °C), it is then washed with warm water. The cleaning tube must be vibrated or beaten to cause the scale to fall off.
3) Neutralization. Impregnate and wash in 10% caustic soda (soda) solution for 15min (the solution temperature is 30-40 °C), and then wash with steam or warm water.
4) Anti-rust treatment. After drying in clean and dry air, apply anti-rust oil.
When the cleaning is confirmed, the first installation can be carried out.
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