The gear cover suspension lug and the fuel tank mating surface can be repaired by damage. It can be repaired when the safety is damaged. If it is not safe or the safety is not complete, it cannot be used. The cracks on the end face of the front seat and the rear end cover can be repaired after shoveling welding, but the length of one weld crack is 10mm, the amount of weld metal is 1kg, and the crack must not extend to the base of the machine base. The screw hole of the fixed end cover on the base, the through hole of the fuel tank, the through hole of the gear cover, etc. may be damaged, and the hole can be expanded and tapped.
The through hole of the fixed pole core on the base is damaged or the hole pitch is not correct. If necessary, it can be repaired and re-drilled to reach the specified size of the drawing. The base seat wear is over-limit, and the hole can be repaired according to the level and equipped with a new end cover. The front and rear end of the zQ80-l motor base has a roundness overhaul limit of 0.mm, the parallelism of the center distance is 0.1mm, and the overhaul limit is 0.2mm. The front and rear end covers are matched with the frame seat. The transition fit is adopted, that is, the maximum clearance of the commutator side is 0.05 mm, the overhaul limit is 0.10 mm; the maximum interference original is 0.08 mm, and the overhaul limit is also 0.08 mm. The maximum clearance of the non-commutator side is 0.05 mm, and the overhaul limit is 0.1 mm. The maximum interference original is 0.09mm, and the overhaul limit is also 0.09mm.
When the gap between the base and the oil tank holding shaft hole is over limit, local surfacing correction is allowed. The joint between the base and the holding shaft oil tank does not exceed 0.2mm on one side, and the sum of the gaps on both sides is not more than 0.3mm. Otherwise, it should be partially piled. Welding correction. The mating surface of the bearing shaft and the bearing shaft should be closely attached, and there should be no 0.1mm through clearance at the window.
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