1, gear pump drive shaft and bushing wear repair gear pump drive shaft and bushing wear, with the gap increases, will certainly affect the pump oil. In this case, you can repair the drive shaft or bushing method to restore its normal with the gap. If the drive shaft wear slightly, simply press the old bushing and put on the standard size bushing, with the gap can be restored to the allowable range. If the drive shaft and bushing wear serious and serious with excessive clearance, not only to replace the bushing, and the drive shaft also applies chrome or vibration welding method to increase its diameter, and then grinding to the standard size, recovery and bushing With the requirements. 2, gear pump oil pump housing repair shell crack repair shell cracks can be cast 508 nickel-copper welding electrode repair. Welds to be close and yuan stomatal, with the flatness of the pump cover with no more than 0.05 mm flatness. 3, gear pump drive shaft bushing hole and driven shaft hole wear Repair drive shaft bushing hole wear, the reaming method can be used to eliminate wear marks, and then with increased to the appropriate size of the bushing. Driven shaft hole wear to reaming method to eliminate wear traces, and then press the hole after the actual size of the preparation of the slave shaft 4, the gear pump pump cavity repair cavity pump cavity wear, the general cavity set France repair, is about to enlarging the inner cavity set with cast iron or steel bushings. Inlaid, the cavity enamel 5, the valve seat repair: pressure limiting valve with a ball valve and plunger valve two. Ball seat wear, the ball can be placed on a valve seat, and then gently tap the metal ball, until the ball valve and valve seat so close. If the valve seat is worn seriously, first remove the worn marks by reaming, and then use the method to make it close. Plunger seat wear, you can put a little valve sand grinding until close together. 5, gear pump cover repair work plane repair: If the gear pump pump cover work surface wear small manual grinding method can be used to eliminate wear marks, that is, put a little valve in the platform or thick glass plate sand, and then put the pump cover Grinding above, until the wear marks disappear, the working surface so far. When the pump cover working surface wear depth of more than 0.1 mm, should be taken after the turning grinding method to repair.
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