1. Various reasons that cause the large-flow gear pump to rotate smoothly can cause the gear pump to heat up, and the elimination method can also refer to its implementation. 2. Oil viscosity is too high or too low.Reselect the oil. 3, side plate, bearing and gear end face severe friction.Repair or replace. 4. High ambient temperature, small fuel tank volume and poor heat dissipation will cause the high-flow gear pump to heat up.Should be handled separately. (1) Gear 进行对研，最后清洗干净;对用肉眼能观察到的严重磨损件，应予以更换。1. Tooth shape repair; use gauze cloth or whetstone to remove the strained or diamond-shaped parts, and then change the direction of the gear tooth contact surface, andcarry outappropriategrinding, and finally clean it; the serious that can be observed with the naked eye Wear parts should be replaced.
原来不齿合工作的齿形表面进行齿合工作，这样不仅能保证其原有的工作性能，还能延长齿轮的工作寿命。3. When the tooth surface of the gear is worn, use oil stone to remove the burrs caused by the wear; at the same time, change the gear tooth orientation to makethe tooth surfacethatwas originally not toothed to perform the tooth toothing work. Some working performance can also extend the workinglife of thegear. (2) Pump body Wear of large-flow gear pump body: The side where the inner cavity is connected to the gear collar is mostly on the suction side.体翻转180度后再用，如泵体属于非对称型，则需采用电镀青铜合金工艺或电刷的方法修复泵体内腔孔磨损部位。If the pump body is symmetrical, the pump body can beturned over 180 degrees before being used. If the pump body is asymmetrical, electroplated bronze alloy process or brush method must be used to repair the wornparts in thecavity of the pump body. (3) bearing race 可将4个轴承座圈放在平面磨床上，以不与齿轮接触的那一面为基准将拉毛端面磨平，其精度应保证在10微米之内，轴承座圈一般磨损较小，若磨损严重，可研磨或适当的加大孔径并重新选配滚针，或更换轴承座圈。The wear of the bearing race is generally on the end face that is in contact with the gear and the inner hole that is in contact with the needle bearing. When the end face is worn or frayed,4 bearing races can be placed on a surface grinder to prevent contact with the gear. The contacting side is used as a reference to grind the brushed end surface. The accuracy should be within 10microns. The bearing races generally wear less. If the wear is severe, you can grind or increase the hole diameter appropriately and re-select a needle roller. Replace the bearingrace. (4) Long and short axis failure Wear occurs mainly in contact with needle bearings.损严重或折断，则需用镀铬工艺修复，或重新加工。If the wear is slight, it can be repaired by polishing (and replaced with a new needle bearing). If the wear issevere or broken, it needs to be repaired by chrome plating or reprocessed.平行度和对称度的要求，装在轴上的平键与齿轮键槽的配合间隙均不能过大，轴不能在齿轮内径产生径向摆动，轴颈与安装大流量齿轮泵齿轮部位配合表面的同轴度不得大于10微米，两端轴颈的同轴度不得超过20-30微米。When re-processing, the key grooves on the long and short axes must meet theparallelism and symmetry requirementsof the shaft centerline.The fitting clearance of the flat keys and gear key grooves mounted on the shaft must not be too large, and the shaft cannot be generated on the inner diameter of the gear. Radialswing, the coaxiality of the journal and the mating surface of the gear part where the large-flow gear pump is installed must not be greater than 10 microns, and the coaxiality of the journals at both ends must not exceed 20-30 microns.