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After the gear oil pump drive shaft bushing hole is worn, the reaming method can be used to eliminate the wear marks, and then a bushing enlarged to the corresponding size is used. The driven shaft hole wear is also reamed to eliminate the wear marks, and then the rear hole is reamed The actual size of the configuration of the driven shaft
Repair of the drive shaft and bushing after wear
After the gear oil pump drive shaft and bushing are worn, the matching clearance increases, which will inevitably affect the pump oil volume. In case of this, the method of repairing the drive shaft or bushing can be used to restore its normal matching clearance. If the drive shaft is slightly worn, only It is necessary to press out the old bush and replace it with a standard size bush, and the fitting clearance can be restored to the allowable range. If the drive shaft and the bush wear severely and the fitting clearance exceeds the standard, not only the bush must be replaced, but the drive shaft is also used Chrome plating or vibration surfacing method increases its diameter, and then grinds it to a standard size to restore the matching requirements with the bushing.
Lubricating oil pump housing repair
Shell cracks can be repaired by welding with cast 508 nickel-copper welding rod. The welding seam must be close and porous, and the flatness error of the joint surface with the pump cover shall not exceed 0.05 mm.
Gear oil pump cover repair
Repair of working plane: If the working plane of the pump cover is less worn, manual grinding can be used to eliminate the wear marks, that is, put a little valve sand on the platform or thick glass plate, and then put the pump cover on it for grinding until the wear marks are eliminated. The working surface is flat. When the wear depth of the working surface of the pump cover exceeds 0.1 mm, it should be repaired by turning first and then grinding.
Repair of the inner cavity of the gear pump casing
After the inner cavity of the gear oil pump casing is worn out, the inner cavity inserting method is generally used to repair, that is, the inner cavity is enlarged and the cast iron or steel bushing is inserted. After inserting, the inner cavity is enamel 5. Repair of the valve seat: pressure limiting valve There are two types of spherical valve and plunger valve. After the spherical valve seat is worn, a steel ball can be placed on the valve seat, and then the steel ball can be tapped lightly with a metal rod until the ball valve and the valve seat are tightly sealed. The seat is severely worn. You can first ream to remove the wear marks, and then use the upper method to make it tight. After the plunger valve seat is worn, you can put a little valve sand for grinding until it is tight.
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