ZYB-4.2/4.0B gear fuel pump gear has a gear end clearance adjustable structure, when the pump appears to work a certain time pressure drops, the pump can be covered by fine-tuning the structure of the external gear pump end clearance can be adjusted so the working pressure of the pump was restored, and can be adjusted several times . So it is more than the general gear pump 5-10 times longer service life , in our high-pressure spray containing impurities burn fuel oil it is the first occasion , and reached the advanced level of similar products at home and abroad .
