1. If the burr on the tooth surface of the transmission gear and the main and driven gears can be polished by the oilstone, if there is any flaking or notch on the teeth, it should be replaced.
2. The main teeth of the sewage suction vehicle and the driven gear should meet the requirements. The thick gauge can be used to measure three points at 120 degrees each other. The normal meshing clearance should be 0.08-0.20 mm. More than 0.75 mm should be replaced.
3. The surface of the suction pump oil pump cover wears and should be polished.
4, due to pressure limiting valve spring is too soft or because of ball valve wear, elliptic, pitting too much, so that when the closure is not strict, should be replaced sewage pump oil pump.
5, if the drive gear horizontal pin loose, should be replaced.
6. If the clearance between the oil pump shaft and shell of the sewage suction truck exceeds 0.16 mm, the pump shaft should be replaced (handshake the pump shaft to check its looseness).
7, the bending of the active shaft, check with a dial indicator, the pointer swing can not exceed 0.06 mm, otherwise it should be school
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